// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package proxy

import (
	"context"
	"errors"
	"fmt"
	"os"
	"strconv"
	"sync"

	"golang.org/x/sync/errgroup"

	"github.com/golang/protobuf/proto"
	"github.com/milvus-io/milvus-proto/go-api/commonpb"
	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
	"github.com/milvus-io/milvus/internal/common"
	"github.com/milvus-io/milvus/internal/log"
	"github.com/milvus-io/milvus/internal/metrics"
	"github.com/milvus-io/milvus/internal/mq/msgstream"
	"github.com/milvus-io/milvus/internal/proto/datapb"
	"github.com/milvus-io/milvus/internal/proto/internalpb"
	"github.com/milvus-io/milvus/internal/proto/proxypb"
	"github.com/milvus-io/milvus/internal/proto/querypb"
	"github.com/milvus-io/milvus/internal/util"
	"github.com/milvus-io/milvus/internal/util/commonpbutil"
	"github.com/milvus-io/milvus/internal/util/crypto"
	"github.com/milvus-io/milvus/internal/util/errorutil"
	"github.com/milvus-io/milvus/internal/util/importutil"
	"github.com/milvus-io/milvus/internal/util/logutil"
	"github.com/milvus-io/milvus/internal/util/metricsinfo"
	"github.com/milvus-io/milvus/internal/util/paramtable"
	"github.com/milvus-io/milvus/internal/util/timerecord"
	"github.com/milvus-io/milvus/internal/util/trace"
	"github.com/milvus-io/milvus/internal/util/typeutil"
	"go.uber.org/zap"
)

const moduleName = "Proxy"

// UpdateStateCode updates the state code of Proxy.
func (node *Proxy) UpdateStateCode(code commonpb.StateCode) {
	node.stateCode.Store(code)
}

// GetComponentStates get state of Proxy.
func (node *Proxy) GetComponentStates(ctx context.Context) (*milvuspb.ComponentStates, error) {
	stats := &milvuspb.ComponentStates{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_Success,
		},
	}
	code, ok := node.stateCode.Load().(commonpb.StateCode)
	if !ok {
		errMsg := "unexpected error in type assertion"
		stats.Status = &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    errMsg,
		}
		return stats, nil
	}
	nodeID := common.NotRegisteredID
	if node.session != nil && node.session.Registered() {
		nodeID = node.session.ServerID
	}
	info := &milvuspb.ComponentInfo{
		// NodeID:    Params.ProxyID, // will race with Proxy.Register()
		NodeID:    nodeID,
		Role:      typeutil.ProxyRole,
		StateCode: code,
	}
	stats.State = info
	return stats, nil
}

// GetStatisticsChannel gets statistics channel of Proxy.
func (node *Proxy) GetStatisticsChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
	return &milvuspb.StringResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_Success,
			Reason:    "",
		},
		Value: "",
	}, nil
}

// InvalidateCollectionMetaCache invalidate the meta cache of specific collection.
func (node *Proxy) InvalidateCollectionMetaCache(ctx context.Context, request *proxypb.InvalidateCollMetaCacheRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}
	ctx = logutil.WithModule(ctx, moduleName)
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-InvalidateCollectionMetaCache")
	defer sp.Finish()
	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collectionName", request.CollectionName),
		zap.Int64("collectionID", request.CollectionID))

	log.Info("received request to invalidate collection meta cache")

	collectionName := request.CollectionName
	collectionID := request.CollectionID

	var aliasName []string
	if globalMetaCache != nil {
		if collectionName != "" {
			globalMetaCache.RemoveCollection(ctx, collectionName) // no need to return error, though collection may be not cached
		}
		if request.CollectionID != UniqueID(0) {
			aliasName = globalMetaCache.RemoveCollectionsByID(ctx, collectionID)
		}
	}
	if request.GetBase().GetMsgType() == commonpb.MsgType_DropCollection {
		// no need to handle error, since this Proxy may not create dml stream for the collection.
		node.chMgr.removeDMLStream(request.GetCollectionID())
		// clean up collection level metrics
		metrics.CleanupCollectionMetrics(paramtable.GetNodeID(), collectionName)
		for _, alias := range aliasName {
			metrics.CleanupCollectionMetrics(paramtable.GetNodeID(), alias)
		}
	}
	log.Info("complete to invalidate collection meta cache")

	return &commonpb.Status{
		ErrorCode: commonpb.ErrorCode_Success,
		Reason:    "",
	}, nil
}

// CreateCollection create a collection by the schema.
// TODO(dragondriver): add more detailed ut for ConsistencyLevel, should we support multiple consistency level in Proxy?
func (node *Proxy) CreateCollection(ctx context.Context, request *milvuspb.CreateCollectionRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-CreateCollection")
	defer sp.Finish()
	method := "CreateCollection"
	tr := timerecord.NewTimeRecorder(method)

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()

	cct := &createCollectionTask{
		ctx:                     ctx,
		Condition:               NewTaskCondition(ctx),
		CreateCollectionRequest: request,
		rootCoord:               node.rootCoord,
	}

	// avoid data race
	lenOfSchema := len(request.Schema)

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.Int("len(schema)", lenOfSchema),
		zap.Int32("shards_num", request.ShardsNum),
		zap.String("consistency_level", request.ConsistencyLevel.String()))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(cct); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.AbandonLabel).Inc()
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", cct.BeginTs()),
		zap.Uint64("EndTs", cct.EndTs()),
		zap.Uint64("timestamp", request.Base.Timestamp))

	if err := cct.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", cct.BeginTs()),
			zap.Uint64("EndTs", cct.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", cct.BeginTs()),
		zap.Uint64("EndTs", cct.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return cct.result, nil
}

// DropCollection drop a collection.
func (node *Proxy) DropCollection(ctx context.Context, request *milvuspb.DropCollectionRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-DropCollection")
	defer sp.Finish()
	method := "DropCollection"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()

	dct := &dropCollectionTask{
		ctx:                   ctx,
		Condition:             NewTaskCondition(ctx),
		DropCollectionRequest: request,
		rootCoord:             node.rootCoord,
		chMgr:                 node.chMgr,
		chTicker:              node.chTicker,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName))

	log.Debug("DropCollection received")

	if err := node.sched.ddQueue.Enqueue(dct); err != nil {
		log.Warn("DropCollection failed to enqueue",
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.AbandonLabel).Inc()
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug("DropCollection enqueued",
		zap.Uint64("BeginTs", dct.BeginTs()),
		zap.Uint64("EndTs", dct.EndTs()))

	if err := dct.WaitToFinish(); err != nil {
		log.Warn("DropCollection failed to WaitToFinish",
			zap.Error(err),
			zap.Uint64("BeginTs", dct.BeginTs()),
			zap.Uint64("EndTs", dct.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug("DropCollection done",
		zap.Uint64("BeginTs", dct.BeginTs()),
		zap.Uint64("EndTs", dct.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return dct.result, nil
}

// HasCollection check if the specific collection exists in Milvus.
func (node *Proxy) HasCollection(ctx context.Context, request *milvuspb.HasCollectionRequest) (*milvuspb.BoolResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.BoolResponse{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-HasCollection")
	defer sp.Finish()
	method := "HasCollection"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName))

	log.Debug("HasCollection received")

	hct := &hasCollectionTask{
		ctx:                  ctx,
		Condition:            NewTaskCondition(ctx),
		HasCollectionRequest: request,
		rootCoord:            node.rootCoord,
	}

	if err := node.sched.ddQueue.Enqueue(hct); err != nil {
		log.Warn("HasCollection failed to enqueue",
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()
		return &milvuspb.BoolResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug("HasCollection enqueued",
		zap.Uint64("BeginTS", hct.BeginTs()),
		zap.Uint64("EndTS", hct.EndTs()))

	if err := hct.WaitToFinish(); err != nil {
		log.Warn("HasCollection failed to WaitToFinish",
			zap.Error(err),
			zap.Uint64("BeginTS", hct.BeginTs()),
			zap.Uint64("EndTS", hct.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()
		return &milvuspb.BoolResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug("HasCollection done",
		zap.Uint64("BeginTS", hct.BeginTs()),
		zap.Uint64("EndTS", hct.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return hct.result, nil
}

// LoadCollection load a collection into query nodes.
func (node *Proxy) LoadCollection(ctx context.Context, request *milvuspb.LoadCollectionRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-LoadCollection")
	defer sp.Finish()
	method := "LoadCollection"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()
	lct := &loadCollectionTask{
		ctx:                   ctx,
		Condition:             NewTaskCondition(ctx),
		LoadCollectionRequest: request,
		queryCoord:            node.queryCoord,
		indexCoord:            node.indexCoord,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName))

	log.Debug("LoadCollection received")

	if err := node.sched.ddQueue.Enqueue(lct); err != nil {
		log.Warn("LoadCollection failed to enqueue",
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug("LoadCollection enqueued",
		zap.Uint64("BeginTS", lct.BeginTs()),
		zap.Uint64("EndTS", lct.EndTs()))

	if err := lct.WaitToFinish(); err != nil {
		log.Warn("LoadCollection failed to WaitToFinish",
			zap.Error(err),
			zap.Uint64("BeginTS", lct.BeginTs()),
			zap.Uint64("EndTS", lct.EndTs()))
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug("LoadCollection done",
		zap.Uint64("BeginTS", lct.BeginTs()),
		zap.Uint64("EndTS", lct.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return lct.result, nil
}

// ReleaseCollection remove the loaded collection from query nodes.
func (node *Proxy) ReleaseCollection(ctx context.Context, request *milvuspb.ReleaseCollectionRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-ReleaseCollection")
	defer sp.Finish()
	method := "ReleaseCollection"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()
	rct := &releaseCollectionTask{
		ctx:                      ctx,
		Condition:                NewTaskCondition(ctx),
		ReleaseCollectionRequest: request,
		queryCoord:               node.queryCoord,
		chMgr:                    node.chMgr,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(rct); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTS", rct.BeginTs()),
		zap.Uint64("EndTS", rct.EndTs()))

	if err := rct.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTS", rct.BeginTs()),
			zap.Uint64("EndTS", rct.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTS", rct.BeginTs()),
		zap.Uint64("EndTS", rct.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return rct.result, nil
}

// DescribeCollection get the meta information of specific collection, such as schema, created timestamp and etc.
func (node *Proxy) DescribeCollection(ctx context.Context, request *milvuspb.DescribeCollectionRequest) (*milvuspb.DescribeCollectionResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.DescribeCollectionResponse{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-DescribeCollection")
	defer sp.Finish()
	method := "DescribeCollection"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	dct := &describeCollectionTask{
		ctx:                       ctx,
		Condition:                 NewTaskCondition(ctx),
		DescribeCollectionRequest: request,
		rootCoord:                 node.rootCoord,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName))

	log.Debug("DescribeCollection received")

	if err := node.sched.ddQueue.Enqueue(dct); err != nil {
		log.Warn("DescribeCollection failed to enqueue",
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()
		return &milvuspb.DescribeCollectionResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug("DescribeCollection enqueued",
		zap.Uint64("BeginTS", dct.BeginTs()),
		zap.Uint64("EndTS", dct.EndTs()))

	if err := dct.WaitToFinish(); err != nil {
		log.Warn("DescribeCollection failed to WaitToFinish",
			zap.Error(err),
			zap.Uint64("BeginTS", dct.BeginTs()),
			zap.Uint64("EndTS", dct.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.DescribeCollectionResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug("DescribeCollection done",
		zap.Uint64("BeginTS", dct.BeginTs()),
		zap.Uint64("EndTS", dct.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return dct.result, nil
}

// GetStatistics get the statistics, such as `num_rows`.
// WARNING: It is an experimental API
func (node *Proxy) GetStatistics(ctx context.Context, request *milvuspb.GetStatisticsRequest) (*milvuspb.GetStatisticsResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.GetStatisticsResponse{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetStatistics")
	defer sp.Finish()
	method := "GetStatistics"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()
	g := &getStatisticsTask{
		request:   request,
		Condition: NewTaskCondition(ctx),
		ctx:       ctx,
		tr:        tr,
		dc:        node.dataCoord,
		qc:        node.queryCoord,
		shardMgr:  node.shardMgr,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName))

	log.Debug(
		rpcReceived(method),
		zap.Strings("partitions", request.PartitionNames))

	if err := node.sched.ddQueue.Enqueue(g); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err),
			zap.Strings("partitions", request.PartitionNames))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.GetStatisticsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTS", g.BeginTs()),
		zap.Uint64("EndTS", g.EndTs()),
		zap.Strings("partitions", request.PartitionNames))

	if err := g.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTS", g.BeginTs()),
			zap.Uint64("EndTS", g.EndTs()),
			zap.Strings("partitions", request.PartitionNames))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.GetStatisticsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTS", g.BeginTs()),
		zap.Uint64("EndTS", g.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return g.result, nil
}

// GetCollectionStatistics get the collection statistics, such as `num_rows`.
func (node *Proxy) GetCollectionStatistics(ctx context.Context, request *milvuspb.GetCollectionStatisticsRequest) (*milvuspb.GetCollectionStatisticsResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.GetCollectionStatisticsResponse{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetCollectionStatistics")
	defer sp.Finish()
	method := "GetCollectionStatistics"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()
	g := &getCollectionStatisticsTask{
		ctx:                            ctx,
		Condition:                      NewTaskCondition(ctx),
		GetCollectionStatisticsRequest: request,
		dataCoord:                      node.dataCoord,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(g); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.GetCollectionStatisticsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTS", g.BeginTs()),
		zap.Uint64("EndTS", g.EndTs()))

	if err := g.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTS", g.BeginTs()),
			zap.Uint64("EndTS", g.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.GetCollectionStatisticsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTS", g.BeginTs()),
		zap.Uint64("EndTS", g.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return g.result, nil
}

// ShowCollections list all collections in Milvus.
func (node *Proxy) ShowCollections(ctx context.Context, request *milvuspb.ShowCollectionsRequest) (*milvuspb.ShowCollectionsResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.ShowCollectionsResponse{
			Status: unhealthyStatus(),
		}, nil
	}
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-ShowCollections")
	defer sp.Finish()
	method := "ShowCollections"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()

	sct := &showCollectionsTask{
		ctx:                    ctx,
		Condition:              NewTaskCondition(ctx),
		ShowCollectionsRequest: request,
		queryCoord:             node.queryCoord,
		rootCoord:              node.rootCoord,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("DbName", request.DbName),
		zap.Uint64("TimeStamp", request.TimeStamp),
		zap.String("ShowType", request.Type.String()))

	log.Debug("ShowCollections received",
		zap.Any("CollectionNames", request.CollectionNames))

	err := node.sched.ddQueue.Enqueue(sct)
	if err != nil {
		log.Warn("ShowCollections failed to enqueue",
			zap.Error(err),
			zap.Any("CollectionNames", request.CollectionNames))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.AbandonLabel).Inc()
		return &milvuspb.ShowCollectionsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug("ShowCollections enqueued",
		zap.Any("CollectionNames", request.CollectionNames))

	err = sct.WaitToFinish()
	if err != nil {
		log.Warn("ShowCollections failed to WaitToFinish",
			zap.Error(err),
			zap.Any("CollectionNames", request.CollectionNames))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()

		return &milvuspb.ShowCollectionsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug("ShowCollections Done",
		zap.Int("len(CollectionNames)", len(request.CollectionNames)),
		zap.Int("num_collections", len(sct.result.CollectionNames)))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return sct.result, nil
}

func (node *Proxy) AlterCollection(ctx context.Context, request *milvuspb.AlterCollectionRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-AlterCollection")
	defer sp.Finish()
	method := "AlterCollection"
	tr := timerecord.NewTimeRecorder(method)

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()

	act := &alterCollectionTask{
		ctx:                    ctx,
		Condition:              NewTaskCondition(ctx),
		AlterCollectionRequest: request,
		rootCoord:              node.rootCoord,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName))

	log.Debug(
		rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(act); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.AbandonLabel).Inc()
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", act.BeginTs()),
		zap.Uint64("EndTs", act.EndTs()),
		zap.Uint64("timestamp", request.Base.Timestamp))

	if err := act.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", act.BeginTs()),
			zap.Uint64("EndTs", act.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", act.BeginTs()),
		zap.Uint64("EndTs", act.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return act.result, nil
}

// CreatePartition create a partition in specific collection.
func (node *Proxy) CreatePartition(ctx context.Context, request *milvuspb.CreatePartitionRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-CreatePartition")
	defer sp.Finish()
	method := "CreatePartition"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()

	cpt := &createPartitionTask{
		ctx:                    ctx,
		Condition:              NewTaskCondition(ctx),
		CreatePartitionRequest: request,
		rootCoord:              node.rootCoord,
		result:                 nil,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("partition", request.PartitionName))

	log.Debug(rpcReceived("CreatePartition"))

	if err := node.sched.ddQueue.Enqueue(cpt); err != nil {
		log.Warn(
			rpcFailedToEnqueue("CreatePartition"),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.AbandonLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued("CreatePartition"),
		zap.Uint64("BeginTS", cpt.BeginTs()),
		zap.Uint64("EndTS", cpt.EndTs()))

	if err := cpt.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish("CreatePartition"),
			zap.Error(err),
			zap.Uint64("BeginTS", cpt.BeginTs()),
			zap.Uint64("EndTS", cpt.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone("CreatePartition"),
		zap.Uint64("BeginTS", cpt.BeginTs()),
		zap.Uint64("EndTS", cpt.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return cpt.result, nil
}

// DropPartition drop a partition in specific collection.
func (node *Proxy) DropPartition(ctx context.Context, request *milvuspb.DropPartitionRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-DropPartition")
	defer sp.Finish()
	method := "DropPartition"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()

	dpt := &dropPartitionTask{
		ctx:                  ctx,
		Condition:            NewTaskCondition(ctx),
		DropPartitionRequest: request,
		rootCoord:            node.rootCoord,
		queryCoord:           node.queryCoord,
		result:               nil,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("partition", request.PartitionName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(dpt); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.AbandonLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTS", dpt.BeginTs()),
		zap.Uint64("EndTS", dpt.EndTs()))

	if err := dpt.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTS", dpt.BeginTs()),
			zap.Uint64("EndTS", dpt.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTS", dpt.BeginTs()),
		zap.Uint64("EndTS", dpt.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return dpt.result, nil
}

// HasPartition check if partition exist.
func (node *Proxy) HasPartition(ctx context.Context, request *milvuspb.HasPartitionRequest) (*milvuspb.BoolResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.BoolResponse{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-HasPartition")
	defer sp.Finish()
	method := "HasPartition"
	tr := timerecord.NewTimeRecorder(method)
	//TODO: use collectionID instead of collectionName
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	hpt := &hasPartitionTask{
		ctx:                 ctx,
		Condition:           NewTaskCondition(ctx),
		HasPartitionRequest: request,
		rootCoord:           node.rootCoord,
		result:              nil,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("partition", request.PartitionName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(hpt); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.BoolResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
			Value: false,
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTS", hpt.BeginTs()),
		zap.Uint64("EndTS", hpt.EndTs()))

	if err := hpt.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTS", hpt.BeginTs()),
			zap.Uint64("EndTS", hpt.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.BoolResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
			Value: false,
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTS", hpt.BeginTs()),
		zap.Uint64("EndTS", hpt.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return hpt.result, nil
}

// LoadPartitions load specific partitions into query nodes.
func (node *Proxy) LoadPartitions(ctx context.Context, request *milvuspb.LoadPartitionsRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-LoadPartitions")
	defer sp.Finish()
	method := "LoadPartitions"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()
	lpt := &loadPartitionsTask{
		ctx:                   ctx,
		Condition:             NewTaskCondition(ctx),
		LoadPartitionsRequest: request,
		queryCoord:            node.queryCoord,
		indexCoord:            node.indexCoord,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.Any("partitions", request.PartitionNames))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(lpt); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTS", lpt.BeginTs()),
		zap.Uint64("EndTS", lpt.EndTs()))

	if err := lpt.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTS", lpt.BeginTs()),
			zap.Uint64("EndTS", lpt.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTS", lpt.BeginTs()),
		zap.Uint64("EndTS", lpt.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return lpt.result, nil
}

// ReleasePartitions release specific partitions from query nodes.
func (node *Proxy) ReleasePartitions(ctx context.Context, request *milvuspb.ReleasePartitionsRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-ReleasePartitions")
	defer sp.Finish()

	rpt := &releasePartitionsTask{
		ctx:                      ctx,
		Condition:                NewTaskCondition(ctx),
		ReleasePartitionsRequest: request,
		queryCoord:               node.queryCoord,
	}

	method := "ReleasePartitions"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.Any("partitions", request.PartitionNames))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(rpt); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTS", rpt.BeginTs()),
		zap.Uint64("EndTS", rpt.EndTs()))

	if err := rpt.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTS", rpt.BeginTs()),
			zap.Uint64("EndTS", rpt.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTS", rpt.BeginTs()),
		zap.Uint64("EndTS", rpt.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return rpt.result, nil
}

// GetPartitionStatistics get the statistics of partition, such as num_rows.
func (node *Proxy) GetPartitionStatistics(ctx context.Context, request *milvuspb.GetPartitionStatisticsRequest) (*milvuspb.GetPartitionStatisticsResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.GetPartitionStatisticsResponse{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetPartitionStatistics")
	defer sp.Finish()
	method := "GetPartitionStatistics"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	g := &getPartitionStatisticsTask{
		ctx:                           ctx,
		Condition:                     NewTaskCondition(ctx),
		GetPartitionStatisticsRequest: request,
		dataCoord:                     node.dataCoord,
	}

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("partition", request.PartitionName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(g); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.GetPartitionStatisticsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTS", g.BeginTs()),
		zap.Uint64("EndTS", g.EndTs()))

	if err := g.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTS", g.BeginTs()),
			zap.Uint64("EndTS", g.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.GetPartitionStatisticsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTS", g.BeginTs()),
		zap.Uint64("EndTS", g.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return g.result, nil
}

// ShowPartitions list all partitions in the specific collection.
func (node *Proxy) ShowPartitions(ctx context.Context, request *milvuspb.ShowPartitionsRequest) (*milvuspb.ShowPartitionsResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.ShowPartitionsResponse{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-ShowPartitions")
	defer sp.Finish()

	spt := &showPartitionsTask{
		ctx:                   ctx,
		Condition:             NewTaskCondition(ctx),
		ShowPartitionsRequest: request,
		rootCoord:             node.rootCoord,
		queryCoord:            node.queryCoord,
		result:                nil,
	}

	method := "ShowPartitions"
	tr := timerecord.NewTimeRecorder(method)
	//TODO: use collectionID instead of collectionName
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(zap.String("role", typeutil.ProxyRole))

	log.Debug(
		rpcReceived(method),
		zap.Any("request", request))

	if err := node.sched.ddQueue.Enqueue(spt); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err),
			zap.Any("request", request))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.ShowPartitionsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTS", spt.BeginTs()),
		zap.Uint64("EndTS", spt.EndTs()),
		zap.String("db", spt.ShowPartitionsRequest.DbName),
		zap.String("collection", spt.ShowPartitionsRequest.CollectionName),
		zap.Any("partitions", spt.ShowPartitionsRequest.PartitionNames))

	if err := spt.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTS", spt.BeginTs()),
			zap.Uint64("EndTS", spt.EndTs()),
			zap.String("db", spt.ShowPartitionsRequest.DbName),
			zap.String("collection", spt.ShowPartitionsRequest.CollectionName),
			zap.Any("partitions", spt.ShowPartitionsRequest.PartitionNames))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.ShowPartitionsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTS", spt.BeginTs()),
		zap.Uint64("EndTS", spt.EndTs()),
		zap.String("db", spt.ShowPartitionsRequest.DbName),
		zap.String("collection", spt.ShowPartitionsRequest.CollectionName),
		zap.Any("partitions", spt.ShowPartitionsRequest.PartitionNames))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return spt.result, nil
}

func (node *Proxy) getCollectionProgress(ctx context.Context, request *milvuspb.GetLoadingProgressRequest, collectionID int64) (int64, error) {
	resp, err := node.queryCoord.ShowCollections(ctx, &querypb.ShowCollectionsRequest{
		Base: commonpbutil.UpdateMsgBase(
			request.Base,
			commonpbutil.WithMsgType(commonpb.MsgType_DescribeCollection),
		),
		CollectionIDs: []int64{collectionID},
	})
	if err != nil {
		return 0, err
	}

	if resp.Status.ErrorCode != commonpb.ErrorCode_Success {
		return 0, errors.New(resp.Status.Reason)
	}

	if len(resp.InMemoryPercentages) == 0 {
		return 0, errors.New("fail to show collections from the querycoord, no data")
	}
	return resp.InMemoryPercentages[0], nil
}

func (node *Proxy) getPartitionProgress(ctx context.Context, request *milvuspb.GetLoadingProgressRequest, collectionID int64) (int64, error) {
	IDs2Names := make(map[int64]string)
	partitionIDs := make([]int64, 0)
	for _, partitionName := range request.PartitionNames {
		partitionID, err := globalMetaCache.GetPartitionID(ctx, request.CollectionName, partitionName)
		if err != nil {
			return 0, err
		}
		IDs2Names[partitionID] = partitionName
		partitionIDs = append(partitionIDs, partitionID)
	}
	resp, err := node.queryCoord.ShowPartitions(ctx, &querypb.ShowPartitionsRequest{
		Base: commonpbutil.UpdateMsgBase(
			request.Base,
			commonpbutil.WithMsgType(commonpb.MsgType_ShowPartitions),
		),
		CollectionID: collectionID,
		PartitionIDs: partitionIDs,
	})
	if err != nil {
		return 0, err
	}
	if len(resp.InMemoryPercentages) != len(partitionIDs) {
		return 0, errors.New("fail to show partitions from the querycoord, invalid data num")
	}
	var progress int64
	for _, p := range resp.InMemoryPercentages {
		progress += p
	}
	progress /= int64(len(partitionIDs))
	return progress, nil
}

func (node *Proxy) GetLoadingProgress(ctx context.Context, request *milvuspb.GetLoadingProgressRequest) (*milvuspb.GetLoadingProgressResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.GetLoadingProgressResponse{Status: unhealthyStatus()}, nil
	}
	method := "GetLoadingProgress"
	tr := timerecord.NewTimeRecorder(method)
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetLoadingProgress")
	defer sp.Finish()
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()
	log := log.Ctx(ctx)

	log.Debug(
		rpcReceived(method),
		zap.Any("request", request))

	getErrResponse := func(err error) *milvuspb.GetLoadingProgressResponse {
		log.Warn("fail to get loading progress",
			zap.Error(err),
			zap.String("collection_name", request.CollectionName),
			zap.Strings("partition_name", request.PartitionNames))
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		return &milvuspb.GetLoadingProgressResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}
	}
	if err := validateCollectionName(request.CollectionName); err != nil {
		return getErrResponse(err), nil
	}
	collectionID, err := globalMetaCache.GetCollectionID(ctx, request.CollectionName)
	if err != nil {
		return getErrResponse(err), nil
	}
	msgBase := commonpbutil.NewMsgBase(
		commonpbutil.WithMsgType(commonpb.MsgType_SystemInfo),
		commonpbutil.WithMsgID(0),
		commonpbutil.WithSourceID(paramtable.GetNodeID()),
	)
	if request.Base == nil {
		request.Base = msgBase
	} else {
		request.Base.MsgID = msgBase.MsgID
		request.Base.Timestamp = msgBase.Timestamp
		request.Base.SourceID = msgBase.SourceID
	}

	var progress int64
	if len(request.GetPartitionNames()) == 0 {
		if progress, err = node.getCollectionProgress(ctx, request, collectionID); err != nil {
			return getErrResponse(err), nil
		}
	} else {
		if progress, err = node.getPartitionProgress(ctx, request, collectionID); err != nil {
			return getErrResponse(err), nil
		}
	}

	log.Debug(
		rpcDone(method),
		zap.Any("request", request))
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return &milvuspb.GetLoadingProgressResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_Success,
		},
		Progress: progress,
	}, nil
}

// CreateIndex create index for collection.
func (node *Proxy) CreateIndex(ctx context.Context, request *milvuspb.CreateIndexRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-CreateIndex")
	defer sp.Finish()

	cit := &createIndexTask{
		ctx:        ctx,
		Condition:  NewTaskCondition(ctx),
		req:        request,
		rootCoord:  node.rootCoord,
		indexCoord: node.indexCoord,
		queryCoord: node.queryCoord,
	}

	method := "CreateIndex"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("field", request.FieldName),
		zap.Any("extra_params", request.ExtraParams))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(cit); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", cit.BeginTs()),
		zap.Uint64("EndTs", cit.EndTs()))

	if err := cit.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", cit.BeginTs()),
			zap.Uint64("EndTs", cit.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", cit.BeginTs()),
		zap.Uint64("EndTs", cit.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return cit.result, nil
}

// DescribeIndex get the meta information of index, such as index state, index id and etc.
func (node *Proxy) DescribeIndex(ctx context.Context, request *milvuspb.DescribeIndexRequest) (*milvuspb.DescribeIndexResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.DescribeIndexResponse{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-DescribeIndex")
	defer sp.Finish()

	dit := &describeIndexTask{
		ctx:                  ctx,
		Condition:            NewTaskCondition(ctx),
		DescribeIndexRequest: request,
		indexCoord:           node.indexCoord,
	}

	method := "DescribeIndex"
	// avoid data race
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("field", request.FieldName),
		zap.String("index name", request.IndexName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(dit); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.DescribeIndexResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", dit.BeginTs()),
		zap.Uint64("EndTs", dit.EndTs()))

	if err := dit.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", dit.BeginTs()),
			zap.Uint64("EndTs", dit.EndTs()))

		errCode := commonpb.ErrorCode_UnexpectedError
		if dit.result != nil {
			errCode = dit.result.Status.GetErrorCode()
		}
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.DescribeIndexResponse{
			Status: &commonpb.Status{
				ErrorCode: errCode,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", dit.BeginTs()),
		zap.Uint64("EndTs", dit.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return dit.result, nil
}

// DropIndex drop the index of collection.
func (node *Proxy) DropIndex(ctx context.Context, request *milvuspb.DropIndexRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-DropIndex")
	defer sp.Finish()

	dit := &dropIndexTask{
		ctx:              ctx,
		Condition:        NewTaskCondition(ctx),
		DropIndexRequest: request,
		indexCoord:       node.indexCoord,
		queryCoord:       node.queryCoord,
	}

	method := "DropIndex"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("field", request.FieldName),
		zap.String("index name", request.IndexName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(dit); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", dit.BeginTs()),
		zap.Uint64("EndTs", dit.EndTs()))

	if err := dit.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", dit.BeginTs()),
			zap.Uint64("EndTs", dit.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", dit.BeginTs()),
		zap.Uint64("EndTs", dit.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return dit.result, nil
}

// GetIndexBuildProgress gets index build progress with filed_name and index_name.
// IndexRows is the num of indexed rows. And TotalRows is the total number of segment rows.
// Deprecated: use DescribeIndex instead
func (node *Proxy) GetIndexBuildProgress(ctx context.Context, request *milvuspb.GetIndexBuildProgressRequest) (*milvuspb.GetIndexBuildProgressResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.GetIndexBuildProgressResponse{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetIndexBuildProgress")
	defer sp.Finish()

	gibpt := &getIndexBuildProgressTask{
		ctx:                          ctx,
		Condition:                    NewTaskCondition(ctx),
		GetIndexBuildProgressRequest: request,
		indexCoord:                   node.indexCoord,
		rootCoord:                    node.rootCoord,
		dataCoord:                    node.dataCoord,
	}

	method := "GetIndexBuildProgress"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("field", request.FieldName),
		zap.String("index name", request.IndexName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(gibpt); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.GetIndexBuildProgressResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", gibpt.BeginTs()),
		zap.Uint64("EndTs", gibpt.EndTs()))

	if err := gibpt.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", gibpt.BeginTs()),
			zap.Uint64("EndTs", gibpt.EndTs()))
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.GetIndexBuildProgressResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", gibpt.BeginTs()),
		zap.Uint64("EndTs", gibpt.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return gibpt.result, nil
}

// GetIndexState get the build-state of index.
// Deprecated: use DescribeIndex instead
func (node *Proxy) GetIndexState(ctx context.Context, request *milvuspb.GetIndexStateRequest) (*milvuspb.GetIndexStateResponse, error) {
	if !node.checkHealthy() {
		return &milvuspb.GetIndexStateResponse{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-Insert")
	defer sp.Finish()

	dipt := &getIndexStateTask{
		ctx:                  ctx,
		Condition:            NewTaskCondition(ctx),
		GetIndexStateRequest: request,
		indexCoord:           node.indexCoord,
		rootCoord:            node.rootCoord,
	}

	method := "GetIndexState"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("field", request.FieldName),
		zap.String("index name", request.IndexName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(dipt); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.GetIndexStateResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", dipt.BeginTs()),
		zap.Uint64("EndTs", dipt.EndTs()))

	if err := dipt.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", dipt.BeginTs()),
			zap.Uint64("EndTs", dipt.EndTs()))
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.GetIndexStateResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", dipt.BeginTs()),
		zap.Uint64("EndTs", dipt.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return dipt.result, nil
}

// Insert insert records into collection.
func (node *Proxy) Insert(ctx context.Context, request *milvuspb.InsertRequest) (*milvuspb.MutationResult, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-Insert")
	defer sp.Finish()
	log := log.Ctx(ctx)
	log.Debug("Start processing insert request in Proxy")
	defer log.Debug("Finish processing insert request in Proxy")

	if !node.checkHealthy() {
		return &milvuspb.MutationResult{
			Status: unhealthyStatus(),
		}, nil
	}
	method := "Insert"
	tr := timerecord.NewTimeRecorder(method)
	receiveSize := proto.Size(request)
	rateCol.Add(internalpb.RateType_DMLInsert.String(), float64(receiveSize))
	metrics.ProxyReceiveBytes.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), metrics.InsertLabel).Add(float64(receiveSize))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()
	it := &insertTask{
		ctx:       ctx,
		Condition: NewTaskCondition(ctx),
		// req:       request,
		insertMsg: &msgstream.InsertMsg{
			BaseMsg: msgstream.BaseMsg{
				HashValues: request.HashKeys,
			},
			InsertRequest: internalpb.InsertRequest{
				Base: commonpbutil.NewMsgBase(
					commonpbutil.WithMsgType(commonpb.MsgType_Insert),
					commonpbutil.WithMsgID(0),
					commonpbutil.WithSourceID(paramtable.GetNodeID()),
				),
				CollectionName: request.CollectionName,
				PartitionName:  request.PartitionName,
				FieldsData:     request.FieldsData,
				NumRows:        uint64(request.NumRows),
				Version:        internalpb.InsertDataVersion_ColumnBased,
				// RowData: transfer column based request to this
			},
		},
		idAllocator:   node.rowIDAllocator,
		segIDAssigner: node.segAssigner,
		chMgr:         node.chMgr,
		chTicker:      node.chTicker,
	}

	if len(it.insertMsg.PartitionName) <= 0 {
		it.insertMsg.PartitionName = Params.CommonCfg.DefaultPartitionName.GetValue()
	}

	constructFailedResponse := func(err error) *milvuspb.MutationResult {
		numRows := request.NumRows
		errIndex := make([]uint32, numRows)
		for i := uint32(0); i < numRows; i++ {
			errIndex[i] = i
		}

		return &milvuspb.MutationResult{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
			ErrIndex: errIndex,
		}
	}

	log.Debug("Enqueue insert request in Proxy",
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("partition", request.PartitionName),
		zap.Int("len(FieldsData)", len(request.FieldsData)),
		zap.Int("len(HashKeys)", len(request.HashKeys)),
		zap.Uint32("NumRows", request.NumRows))

	if err := node.sched.dmQueue.Enqueue(it); err != nil {
		log.Warn("Failed to enqueue insert task: " + err.Error())
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()
		return constructFailedResponse(err), nil
	}

	log.Debug("Detail of insert request in Proxy",
		zap.String("role", typeutil.ProxyRole),
		zap.Uint64("BeginTS", it.BeginTs()),
		zap.Uint64("EndTS", it.EndTs()),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("partition", request.PartitionName),
		zap.Uint32("NumRows", request.NumRows))

	if err := it.WaitToFinish(); err != nil {
		log.Warn("Failed to execute insert task in task scheduler: " + err.Error())
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()
		return constructFailedResponse(err), nil
	}

	if it.result.Status.ErrorCode != commonpb.ErrorCode_Success {
		setErrorIndex := func() {
			numRows := request.NumRows
			errIndex := make([]uint32, numRows)
			for i := uint32(0); i < numRows; i++ {
				errIndex[i] = i
			}
			it.result.ErrIndex = errIndex
		}

		setErrorIndex()
	}

	// InsertCnt always equals to the number of entities in the request
	it.result.InsertCnt = int64(request.NumRows)

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	successCnt := it.result.InsertCnt - int64(len(it.result.ErrIndex))
	metrics.ProxyInsertVectors.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10)).Add(float64(successCnt))
	metrics.ProxyMutationLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), metrics.InsertLabel).Observe(float64(tr.ElapseSpan().Milliseconds()))
	metrics.ProxyCollectionMutationLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), metrics.InsertLabel, request.CollectionName).Observe(float64(tr.ElapseSpan().Milliseconds()))
	log.Debug("lxg debug", zap.Any("insertResult", it.result))
	return it.result, nil
}

// Delete delete records from collection, then these records cannot be searched.
func (node *Proxy) Delete(ctx context.Context, request *milvuspb.DeleteRequest) (*milvuspb.MutationResult, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-Delete")
	defer sp.Finish()
	log := log.Ctx(ctx)
	log.Debug("Start processing delete request in Proxy")
	defer log.Debug("Finish processing delete request in Proxy")

	receiveSize := proto.Size(request)
	rateCol.Add(internalpb.RateType_DMLDelete.String(), float64(receiveSize))
	metrics.ProxyReceiveBytes.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), metrics.DeleteLabel).Add(float64(receiveSize))

	if !node.checkHealthy() {
		return &milvuspb.MutationResult{
			Status: unhealthyStatus(),
		}, nil
	}

	method := "Delete"
	tr := timerecord.NewTimeRecorder(method)

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()
	dt := &deleteTask{
		ctx:        ctx,
		Condition:  NewTaskCondition(ctx),
		deleteExpr: request.Expr,
		deleteMsg: &BaseDeleteTask{
			BaseMsg: msgstream.BaseMsg{
				HashValues: request.HashKeys,
			},
			DeleteRequest: internalpb.DeleteRequest{
				Base: commonpbutil.NewMsgBase(
					commonpbutil.WithMsgType(commonpb.MsgType_Delete),
					commonpbutil.WithMsgID(0),
				),
				DbName:         request.DbName,
				CollectionName: request.CollectionName,
				PartitionName:  request.PartitionName,
				// RowData: transfer column based request to this
			},
		},
		chMgr:    node.chMgr,
		chTicker: node.chTicker,
	}

	log.Debug("Enqueue delete request in Proxy",
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("partition", request.PartitionName),
		zap.String("expr", request.Expr))

	// MsgID will be set by Enqueue()
	if err := node.sched.dmQueue.Enqueue(dt); err != nil {
		log.Error("Failed to enqueue delete task: " + err.Error())
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.MutationResult{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	log.Debug("Detail of delete request in Proxy",
		zap.String("role", typeutil.ProxyRole),
		zap.Uint64("timestamp", dt.deleteMsg.Base.Timestamp),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.String("partition", request.PartitionName),
		zap.String("expr", request.Expr))

	if err := dt.WaitToFinish(); err != nil {
		log.Error("Failed to execute delete task in task scheduler: " + err.Error())
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()
		return &milvuspb.MutationResult{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyMutationLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), metrics.DeleteLabel).Observe(float64(tr.ElapseSpan().Milliseconds()))
	metrics.ProxyCollectionMutationLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), metrics.DeleteLabel, request.CollectionName).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return dt.result, nil
}

// Search search the most similar records of requests.
func (node *Proxy) Search(ctx context.Context, request *milvuspb.SearchRequest) (*milvuspb.SearchResults, error) {
	receiveSize := proto.Size(request)
	metrics.ProxyReceiveBytes.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), metrics.SearchLabel).Add(float64(receiveSize))

	rateCol.Add(internalpb.RateType_DQLSearch.String(), float64(request.GetNq()))

	if !node.checkHealthy() {
		return &milvuspb.SearchResults{
			Status: unhealthyStatus(),
		}, nil
	}
	method := "Search"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-Search")
	defer sp.Finish()

	qt := &searchTask{
		ctx:       ctx,
		Condition: NewTaskCondition(ctx),
		SearchRequest: &internalpb.SearchRequest{
			Base: commonpbutil.NewMsgBase(
				commonpbutil.WithMsgType(commonpb.MsgType_Search),
				commonpbutil.WithSourceID(paramtable.GetNodeID()),
			),
			ReqID: paramtable.GetNodeID(),
		},
		request:  request,
		qc:       node.queryCoord,
		tr:       timerecord.NewTimeRecorder("search"),
		shardMgr: node.shardMgr,
	}

	travelTs := request.TravelTimestamp
	guaranteeTs := request.GuaranteeTimestamp

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.Any("partitions", request.PartitionNames),
		zap.Any("dsl", request.Dsl),
		zap.Any("len(PlaceholderGroup)", len(request.PlaceholderGroup)),
		zap.Any("OutputFields", request.OutputFields),
		zap.Any("search_params", request.SearchParams),
		zap.Uint64("travel_timestamp", travelTs),
		zap.Uint64("guarantee_timestamp", guaranteeTs))

	log.Debug(
		rpcReceived(method))

	if err := node.sched.dqQueue.Enqueue(qt); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.SearchResults{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}
	tr.CtxRecord(ctx, "search request enqueue")

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("timestamp", qt.Base.Timestamp))

	if err := qt.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.SearchResults{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	span := tr.CtxRecord(ctx, "wait search result")
	metrics.ProxyWaitForSearchResultLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10),
		metrics.SearchLabel).Observe(float64(span.Milliseconds()))
	tr.CtxRecord(ctx, "wait search result")
	log.Debug(rpcDone(method))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxySearchVectors.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10)).Add(float64(qt.result.GetResults().GetNumQueries()))
	searchDur := tr.ElapseSpan().Milliseconds()
	metrics.ProxySQLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10),
		metrics.SearchLabel).Observe(float64(searchDur))
	metrics.ProxyCollectionSQLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10),
		metrics.SearchLabel, request.CollectionName).Observe(float64(searchDur))
	if qt.result != nil {
		sentSize := proto.Size(qt.result)
		metrics.ProxyReadReqSendBytes.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10)).Add(float64(sentSize))
		rateCol.Add(metricsinfo.ReadResultThroughput, float64(sentSize))
	}
	return qt.result, nil
}

// Flush notify data nodes to persist the data of collection.
func (node *Proxy) Flush(ctx context.Context, request *milvuspb.FlushRequest) (*milvuspb.FlushResponse, error) {
	resp := &milvuspb.FlushResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    "",
		},
	}
	if !node.checkHealthy() {
		resp.Status.Reason = "proxy is not healthy"
		return resp, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-Flush")
	defer sp.Finish()

	ft := &flushTask{
		ctx:          ctx,
		Condition:    NewTaskCondition(ctx),
		FlushRequest: request,
		dataCoord:    node.dataCoord,
	}

	method := "Flush"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.Any("collections", request.CollectionNames))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(ft); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.AbandonLabel).Inc()

		resp.Status.Reason = err.Error()
		return resp, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", ft.BeginTs()),
		zap.Uint64("EndTs", ft.EndTs()))

	if err := ft.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", ft.BeginTs()),
			zap.Uint64("EndTs", ft.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()

		resp.Status.ErrorCode = commonpb.ErrorCode_UnexpectedError
		resp.Status.Reason = err.Error()
		return resp, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", ft.BeginTs()),
		zap.Uint64("EndTs", ft.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return ft.result, nil
}

// Query get the records by primary keys.
func (node *Proxy) Query(ctx context.Context, request *milvuspb.QueryRequest) (*milvuspb.QueryResults, error) {
	receiveSize := proto.Size(request)
	metrics.ProxyReceiveBytes.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), metrics.QueryLabel).Add(float64(receiveSize))

	rateCol.Add(internalpb.RateType_DQLQuery.String(), 1)

	if !node.checkHealthy() {
		return &milvuspb.QueryResults{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-Query")
	defer sp.Finish()
	tr := timerecord.NewTimeRecorder("Query")

	qt := &queryTask{
		ctx:       ctx,
		Condition: NewTaskCondition(ctx),
		RetrieveRequest: &internalpb.RetrieveRequest{
			Base: commonpbutil.NewMsgBase(
				commonpbutil.WithMsgType(commonpb.MsgType_Retrieve),
				commonpbutil.WithSourceID(paramtable.GetNodeID()),
			),
			ReqID: paramtable.GetNodeID(),
		},
		request:          request,
		qc:               node.queryCoord,
		queryShardPolicy: mergeRoundRobinPolicy,
		shardMgr:         node.shardMgr,
	}

	method := "Query"

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("collection", request.CollectionName),
		zap.Strings("partitions", request.PartitionNames))

	log.Debug(
		rpcReceived(method),
		zap.String("expr", request.Expr),
		zap.Strings("OutputFields", request.OutputFields),
		zap.Uint64("travel_timestamp", request.TravelTimestamp),
		zap.Uint64("guarantee_timestamp", request.GuaranteeTimestamp))

	if err := node.sched.dqQueue.Enqueue(qt); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.AbandonLabel).Inc()

		return &milvuspb.QueryResults{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}
	tr.CtxRecord(ctx, "query request enqueue")

	log.Debug(rpcEnqueued(method))

	if err := qt.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()

		return &milvuspb.QueryResults{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}
	span := tr.CtxRecord(ctx, "wait query result")
	metrics.ProxyWaitForSearchResultLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10),
		metrics.QueryLabel).Observe(float64(span.Milliseconds()))

	log.Debug(rpcDone(method))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()

	metrics.ProxySQLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10),
		metrics.QueryLabel).Observe(float64(tr.ElapseSpan().Milliseconds()))
	metrics.ProxyCollectionSQLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10),
		metrics.QueryLabel, request.CollectionName).Observe(float64(tr.ElapseSpan().Milliseconds()))

	ret := &milvuspb.QueryResults{
		Status:     qt.result.Status,
		FieldsData: qt.result.FieldsData,
	}
	sentSize := proto.Size(qt.result)
	rateCol.Add(metricsinfo.ReadResultThroughput, float64(sentSize))
	metrics.ProxyReadReqSendBytes.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10)).Add(float64(sentSize))
	return ret, nil
}

// CreateAlias create alias for collection, then you can search the collection with alias.
func (node *Proxy) CreateAlias(ctx context.Context, request *milvuspb.CreateAliasRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-CreateAlias")
	defer sp.Finish()

	cat := &CreateAliasTask{
		ctx:                ctx,
		Condition:          NewTaskCondition(ctx),
		CreateAliasRequest: request,
		rootCoord:          node.rootCoord,
	}

	method := "CreateAlias"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("alias", request.Alias),
		zap.String("collection", request.CollectionName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(cat); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.AbandonLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", cat.BeginTs()),
		zap.Uint64("EndTs", cat.EndTs()))

	if err := cat.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", cat.BeginTs()),
			zap.Uint64("EndTs", cat.EndTs()))
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", cat.BeginTs()),
		zap.Uint64("EndTs", cat.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return cat.result, nil
}

// DropAlias alter the alias of collection.
func (node *Proxy) DropAlias(ctx context.Context, request *milvuspb.DropAliasRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-DropAlias")
	defer sp.Finish()

	dat := &DropAliasTask{
		ctx:              ctx,
		Condition:        NewTaskCondition(ctx),
		DropAliasRequest: request,
		rootCoord:        node.rootCoord,
	}

	method := "DropAlias"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("alias", request.Alias))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(dat); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.AbandonLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", dat.BeginTs()),
		zap.Uint64("EndTs", dat.EndTs()))

	if err := dat.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", dat.BeginTs()),
			zap.Uint64("EndTs", dat.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", dat.BeginTs()),
		zap.Uint64("EndTs", dat.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return dat.result, nil
}

// AlterAlias alter alias of collection.
func (node *Proxy) AlterAlias(ctx context.Context, request *milvuspb.AlterAliasRequest) (*commonpb.Status, error) {
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-AlterAlias")
	defer sp.Finish()

	aat := &AlterAliasTask{
		ctx:               ctx,
		Condition:         NewTaskCondition(ctx),
		AlterAliasRequest: request,
		rootCoord:         node.rootCoord,
	}

	method := "AlterAlias"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.TotalLabel).Inc()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", request.DbName),
		zap.String("alias", request.Alias),
		zap.String("collection", request.CollectionName))

	log.Debug(rpcReceived(method))

	if err := node.sched.ddQueue.Enqueue(aat); err != nil {
		log.Warn(
			rpcFailedToEnqueue(method),
			zap.Error(err))
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.AbandonLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcEnqueued(method),
		zap.Uint64("BeginTs", aat.BeginTs()),
		zap.Uint64("EndTs", aat.EndTs()))

	if err := aat.WaitToFinish(); err != nil {
		log.Warn(
			rpcFailedToWaitToFinish(method),
			zap.Error(err),
			zap.Uint64("BeginTs", aat.BeginTs()),
			zap.Uint64("EndTs", aat.EndTs()))

		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()

		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}

	log.Debug(
		rpcDone(method),
		zap.Uint64("BeginTs", aat.BeginTs()),
		zap.Uint64("EndTs", aat.EndTs()))

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return aat.result, nil
}

// CalcDistance calculates the distances between vectors.
func (node *Proxy) CalcDistance(ctx context.Context, request *milvuspb.CalcDistanceRequest) (*milvuspb.CalcDistanceResults, error) {
	if !node.checkHealthy() {
		return &milvuspb.CalcDistanceResults{
			Status: unhealthyStatus(),
		}, nil
	}

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-CalcDistance")
	defer sp.Finish()
	traceID, _, _ := trace.InfoFromSpan(sp)

	query := func(ids *milvuspb.VectorIDs) (*milvuspb.QueryResults, error) {
		outputFields := []string{ids.FieldName}

		queryRequest := &milvuspb.QueryRequest{
			DbName:         "",
			CollectionName: ids.CollectionName,
			PartitionNames: ids.PartitionNames,
			OutputFields:   outputFields,
		}

		qt := &queryTask{
			ctx:       ctx,
			Condition: NewTaskCondition(ctx),
			RetrieveRequest: &internalpb.RetrieveRequest{
				Base: commonpbutil.NewMsgBase(
					commonpbutil.WithMsgType(commonpb.MsgType_Retrieve),
					commonpbutil.WithSourceID(paramtable.GetNodeID()),
				),
				ReqID: paramtable.GetNodeID(),
			},
			request: queryRequest,
			qc:      node.queryCoord,
			ids:     ids.IdArray,

			queryShardPolicy: mergeRoundRobinPolicy,
			shardMgr:         node.shardMgr,
		}

		log := log.Ctx(ctx).With(
			zap.String("collection", queryRequest.CollectionName),
			zap.Any("partitions", queryRequest.PartitionNames),
			zap.Any("OutputFields", queryRequest.OutputFields))

		err := node.sched.dqQueue.Enqueue(qt)
		if err != nil {
			log.Error("CalcDistance queryTask failed to enqueue",
				zap.Error(err))

			return &milvuspb.QueryResults{
				Status: &commonpb.Status{
					ErrorCode: commonpb.ErrorCode_UnexpectedError,
					Reason:    err.Error(),
				},
			}, err
		}

		log.Debug("CalcDistance queryTask enqueued")

		err = qt.WaitToFinish()
		if err != nil {
			log.Error("CalcDistance queryTask failed to WaitToFinish",
				zap.Error(err))

			return &milvuspb.QueryResults{
				Status: &commonpb.Status{
					ErrorCode: commonpb.ErrorCode_UnexpectedError,
					Reason:    err.Error(),
				},
			}, err
		}

		log.Debug("CalcDistance queryTask Done")

		return &milvuspb.QueryResults{
			Status:     qt.result.Status,
			FieldsData: qt.result.FieldsData,
		}, nil
	}

	// calcDistanceTask is not a standard task, no need to enqueue
	task := &calcDistanceTask{
		traceID:   traceID,
		queryFunc: query,
	}

	return task.Execute(ctx, request)
}

// GetDdChannel returns the used channel for dd operations.
func (node *Proxy) GetDdChannel(ctx context.Context, request *internalpb.GetDdChannelRequest) (*milvuspb.StringResponse, error) {
	panic("implement me")
}

// GetPersistentSegmentInfo get the information of sealed segment.
func (node *Proxy) GetPersistentSegmentInfo(ctx context.Context, req *milvuspb.GetPersistentSegmentInfoRequest) (*milvuspb.GetPersistentSegmentInfoResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetPersistentSegmentInfo")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("GetPersistentSegmentInfo",
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", req.DbName),
		zap.Any("collection", req.CollectionName))

	resp := &milvuspb.GetPersistentSegmentInfoResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
		},
	}
	if !node.checkHealthy() {
		resp.Status = unhealthyStatus()
		return resp, nil
	}
	method := "GetPersistentSegmentInfo"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	// list segments
	collectionID, err := globalMetaCache.GetCollectionID(ctx, req.GetCollectionName())
	if err != nil {
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		resp.Status.Reason = fmt.Errorf("getCollectionID failed, err:%w", err).Error()
		return resp, nil
	}

	getSegmentsByStatesResponse, err := node.dataCoord.GetSegmentsByStates(ctx, &datapb.GetSegmentsByStatesRequest{
		CollectionID: collectionID,
		// -1 means list all partition segemnts
		PartitionID: -1,
		States:      []commonpb.SegmentState{commonpb.SegmentState_Flushing, commonpb.SegmentState_Flushed, commonpb.SegmentState_Sealed},
	})
	if err != nil {
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		resp.Status.Reason = fmt.Errorf("getSegmentsOfCollection, err:%w", err).Error()
		return resp, nil
	}

	// get Segment info
	infoResp, err := node.dataCoord.GetSegmentInfo(ctx, &datapb.GetSegmentInfoRequest{
		Base: commonpbutil.NewMsgBase(
			commonpbutil.WithMsgType(commonpb.MsgType_SegmentInfo),
			commonpbutil.WithMsgID(0),
			commonpbutil.WithSourceID(paramtable.GetNodeID()),
		),
		SegmentIDs: getSegmentsByStatesResponse.Segments,
	})
	if err != nil {
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()
		log.Warn("GetPersistentSegmentInfo fail",
			zap.Error(err))
		resp.Status.Reason = fmt.Errorf("dataCoord:GetSegmentInfo, err:%w", err).Error()
		return resp, nil
	}
	log.Debug("GetPersistentSegmentInfo",
		zap.Int("len(infos)", len(infoResp.Infos)),
		zap.Any("status", infoResp.Status))
	if infoResp.Status.ErrorCode != commonpb.ErrorCode_Success {
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
			metrics.FailLabel).Inc()
		resp.Status.Reason = infoResp.Status.Reason
		return resp, nil
	}
	persistentInfos := make([]*milvuspb.PersistentSegmentInfo, len(infoResp.Infos))
	for i, info := range infoResp.Infos {
		persistentInfos[i] = &milvuspb.PersistentSegmentInfo{
			SegmentID:    info.ID,
			CollectionID: info.CollectionID,
			PartitionID:  info.PartitionID,
			NumRows:      info.NumOfRows,
			State:        info.State,
		}
	}
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	resp.Status.ErrorCode = commonpb.ErrorCode_Success
	resp.Infos = persistentInfos
	return resp, nil
}

// GetQuerySegmentInfo gets segment information from QueryCoord.
func (node *Proxy) GetQuerySegmentInfo(ctx context.Context, req *milvuspb.GetQuerySegmentInfoRequest) (*milvuspb.GetQuerySegmentInfoResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetQuerySegmentInfo")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("GetQuerySegmentInfo",
		zap.String("role", typeutil.ProxyRole),
		zap.String("db", req.DbName),
		zap.Any("collection", req.CollectionName))

	resp := &milvuspb.GetQuerySegmentInfoResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
		},
	}
	if !node.checkHealthy() {
		resp.Status = unhealthyStatus()
		return resp, nil
	}

	method := "GetQuerySegmentInfo"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	collID, err := globalMetaCache.GetCollectionID(ctx, req.CollectionName)
	if err != nil {
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		resp.Status.Reason = err.Error()
		return resp, nil
	}
	infoResp, err := node.queryCoord.GetSegmentInfo(ctx, &querypb.GetSegmentInfoRequest{
		Base: commonpbutil.NewMsgBase(
			commonpbutil.WithMsgType(commonpb.MsgType_SegmentInfo),
			commonpbutil.WithMsgID(0),
			commonpbutil.WithSourceID(paramtable.GetNodeID()),
		),
		CollectionID: collID,
	})
	if err != nil {
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		log.Error("Failed to get segment info from QueryCoord",
			zap.Error(err))
		resp.Status.Reason = err.Error()
		return resp, nil
	}
	log.Debug("GetQuerySegmentInfo",
		zap.Any("infos", infoResp.Infos),
		zap.Any("status", infoResp.Status))
	if infoResp.Status.ErrorCode != commonpb.ErrorCode_Success {
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		log.Error("Failed to get segment info from QueryCoord",
			zap.String("errMsg", infoResp.Status.Reason))
		resp.Status.Reason = infoResp.Status.Reason
		return resp, nil
	}
	queryInfos := make([]*milvuspb.QuerySegmentInfo, len(infoResp.Infos))
	for i, info := range infoResp.Infos {
		queryInfos[i] = &milvuspb.QuerySegmentInfo{
			SegmentID:    info.SegmentID,
			CollectionID: info.CollectionID,
			PartitionID:  info.PartitionID,
			NumRows:      info.NumRows,
			MemSize:      info.MemSize,
			IndexName:    info.IndexName,
			IndexID:      info.IndexID,
			State:        info.SegmentState,
			NodeIds:      info.NodeIds,
		}
	}

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	resp.Status.ErrorCode = commonpb.ErrorCode_Success
	resp.Infos = queryInfos
	return resp, nil
}

// Dummy handles dummy request
func (node *Proxy) Dummy(ctx context.Context, req *milvuspb.DummyRequest) (*milvuspb.DummyResponse, error) {
	failedResponse := &milvuspb.DummyResponse{
		Response: `{"status": "fail"}`,
	}

	// TODO(wxyu): change name RequestType to Request
	drt, err := parseDummyRequestType(req.RequestType)

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-Dummy")
	defer sp.Finish()

	log := log.Ctx(ctx)

	if err != nil {
		log.Warn("Failed to parse dummy request type",
			zap.Error(err))
		return failedResponse, nil
	}

	if drt.RequestType == "query" {
		drr, err := parseDummyQueryRequest(req.RequestType)
		if err != nil {
			log.Warn("Failed to parse dummy query request",
				zap.Error(err))
			return failedResponse, nil
		}

		request := &milvuspb.QueryRequest{
			DbName:         drr.DbName,
			CollectionName: drr.CollectionName,
			PartitionNames: drr.PartitionNames,
			OutputFields:   drr.OutputFields,
		}

		_, err = node.Query(ctx, request)
		if err != nil {
			log.Warn("Failed to execute dummy query",
				zap.Error(err))
			return failedResponse, err
		}

		return &milvuspb.DummyResponse{
			Response: `{"status": "success"}`,
		}, nil
	}

	log.Debug("cannot find specify dummy request type")
	return failedResponse, nil
}

// RegisterLink registers a link
func (node *Proxy) RegisterLink(ctx context.Context, req *milvuspb.RegisterLinkRequest) (*milvuspb.RegisterLinkResponse, error) {
	code := node.stateCode.Load().(commonpb.StateCode)

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-RegisterLink")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.Any("state code of proxy", code))

	log.Debug("RegisterLink")

	if code != commonpb.StateCode_Healthy {
		return &milvuspb.RegisterLinkResponse{
			Address: nil,
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    "proxy not healthy",
			},
		}, nil
	}
	//metrics.ProxyLinkedSDKs.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10)).Inc()
	return &milvuspb.RegisterLinkResponse{
		Address: nil,
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_Success,
			Reason:    os.Getenv(metricsinfo.DeployModeEnvKey),
		},
	}, nil
}

// GetMetrics gets the metrics of proxy
// TODO(dragondriver): cache the Metrics and set a retention to the cache
func (node *Proxy) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetMetrics")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("Proxy.GetMetrics",
		zap.Int64("node_id", paramtable.GetNodeID()),
		zap.String("req", req.Request))

	if !node.checkHealthy() {
		log.Warn("Proxy.GetMetrics failed",
			zap.Int64("node_id", paramtable.GetNodeID()),
			zap.String("req", req.Request),
			zap.Error(errProxyIsUnhealthy(paramtable.GetNodeID())))

		return &milvuspb.GetMetricsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    msgProxyIsUnhealthy(paramtable.GetNodeID()),
			},
			Response: "",
		}, nil
	}

	metricType, err := metricsinfo.ParseMetricType(req.Request)
	if err != nil {
		log.Warn("Proxy.GetMetrics failed to parse metric type",
			zap.Int64("node_id", paramtable.GetNodeID()),
			zap.String("req", req.Request),
			zap.Error(err))

		return &milvuspb.GetMetricsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
			Response: "",
		}, nil
	}

	log.Debug("Proxy.GetMetrics",
		zap.String("metric_type", metricType))

	req.Base = commonpbutil.NewMsgBase(
		commonpbutil.WithMsgType(commonpb.MsgType_SystemInfo),
		commonpbutil.WithMsgID(0),
		commonpbutil.WithSourceID(paramtable.GetNodeID()),
	)
	if metricType == metricsinfo.SystemInfoMetrics {
		ret, err := node.metricsCacheManager.GetSystemInfoMetrics()
		if err == nil && ret != nil {
			return ret, nil
		}
		log.Debug("failed to get system info metrics from cache, recompute instead",
			zap.Error(err))

		metrics, err := getSystemInfoMetrics(ctx, req, node)

		log.Debug("Proxy.GetMetrics",
			zap.Int64("node_id", paramtable.GetNodeID()),
			zap.String("req", req.Request),
			zap.String("metric_type", metricType),
			zap.Any("metrics", metrics), // TODO(dragondriver): necessary? may be very large
			zap.Error(err))

		node.metricsCacheManager.UpdateSystemInfoMetrics(metrics)

		return metrics, nil
	}

	log.Warn("Proxy.GetMetrics failed, request metric type is not implemented yet",
		zap.Int64("node_id", paramtable.GetNodeID()),
		zap.String("req", req.Request),
		zap.String("metric_type", metricType))

	return &milvuspb.GetMetricsResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    metricsinfo.MsgUnimplementedMetric,
		},
		Response: "",
	}, nil
}

// GetProxyMetrics gets the metrics of proxy, it's an internal interface which is different from GetMetrics interface,
// because it only obtains the metrics of Proxy, not including the topological metrics of Query cluster and Data cluster.
func (node *Proxy) GetProxyMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetProxyMetrics")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.Int64("node_id", paramtable.GetNodeID()),
		zap.String("req", req.Request))

	if !node.checkHealthy() {
		log.Warn("Proxy.GetProxyMetrics failed",
			zap.Error(errProxyIsUnhealthy(paramtable.GetNodeID())))

		return &milvuspb.GetMetricsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    msgProxyIsUnhealthy(paramtable.GetNodeID()),
			},
		}, nil
	}

	metricType, err := metricsinfo.ParseMetricType(req.Request)
	if err != nil {
		log.Warn("Proxy.GetProxyMetrics failed to parse metric type",
			zap.Error(err))

		return &milvuspb.GetMetricsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}

	req.Base = commonpbutil.NewMsgBase(
		commonpbutil.WithMsgType(commonpb.MsgType_SystemInfo),
		commonpbutil.WithMsgID(0),
		commonpbutil.WithSourceID(paramtable.GetNodeID()),
	)

	if metricType == metricsinfo.SystemInfoMetrics {
		proxyMetrics, err := getProxyMetrics(ctx, req, node)
		if err != nil {
			log.Warn("Proxy.GetProxyMetrics failed to getProxyMetrics",
				zap.Error(err))

			return &milvuspb.GetMetricsResponse{
				Status: &commonpb.Status{
					ErrorCode: commonpb.ErrorCode_UnexpectedError,
					Reason:    err.Error(),
				},
			}, nil
		}

		log.Debug("Proxy.GetProxyMetrics",
			zap.String("metric_type", metricType))

		return proxyMetrics, nil
	}

	log.Warn("Proxy.GetProxyMetrics failed, request metric type is not implemented yet",
		zap.String("metric_type", metricType))

	return &milvuspb.GetMetricsResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    metricsinfo.MsgUnimplementedMetric,
		},
	}, nil
}

// LoadBalance would do a load balancing operation between query nodes
func (node *Proxy) LoadBalance(ctx context.Context, req *milvuspb.LoadBalanceRequest) (*commonpb.Status, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-LoadBalance")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("Proxy.LoadBalance",
		zap.Int64("proxy_id", paramtable.GetNodeID()),
		zap.Any("req", req))

	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	status := &commonpb.Status{
		ErrorCode: commonpb.ErrorCode_UnexpectedError,
	}

	collectionID, err := globalMetaCache.GetCollectionID(ctx, req.GetCollectionName())
	if err != nil {
		log.Warn("failed to get collection id",
			zap.String("collection name", req.GetCollectionName()),
			zap.Error(err))
		status.Reason = err.Error()
		return status, nil
	}
	infoResp, err := node.queryCoord.LoadBalance(ctx, &querypb.LoadBalanceRequest{
		Base: commonpbutil.NewMsgBase(
			commonpbutil.WithMsgType(commonpb.MsgType_LoadBalanceSegments),
			commonpbutil.WithMsgID(0),
			commonpbutil.WithSourceID(paramtable.GetNodeID()),
		),
		SourceNodeIDs:    []int64{req.SrcNodeID},
		DstNodeIDs:       req.DstNodeIDs,
		BalanceReason:    querypb.TriggerCondition_GrpcRequest,
		SealedSegmentIDs: req.SealedSegmentIDs,
		CollectionID:     collectionID,
	})
	if err != nil {
		log.Warn("Failed to LoadBalance from Query Coordinator",
			zap.Any("req", req),
			zap.Error(err))
		status.Reason = err.Error()
		return status, nil
	}
	if infoResp.ErrorCode != commonpb.ErrorCode_Success {
		log.Warn("Failed to LoadBalance from Query Coordinator",
			zap.String("errMsg", infoResp.Reason))
		status.Reason = infoResp.Reason
		return status, nil
	}
	log.Debug("LoadBalance Done",
		zap.Any("req", req),
		zap.Any("status", infoResp))
	status.ErrorCode = commonpb.ErrorCode_Success
	return status, nil
}

// GetReplicas gets replica info
func (node *Proxy) GetReplicas(ctx context.Context, req *milvuspb.GetReplicasRequest) (*milvuspb.GetReplicasResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetReplicas")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("received get replicas request",
		zap.Int64("collection", req.GetCollectionID()),
		zap.Bool("with shard nodes", req.GetWithShardNodes()))
	resp := &milvuspb.GetReplicasResponse{}
	if !node.checkHealthy() {
		resp.Status = unhealthyStatus()
		return resp, nil
	}

	req.Base = commonpbutil.NewMsgBase(
		commonpbutil.WithMsgType(commonpb.MsgType_GetReplicas),
		commonpbutil.WithSourceID(paramtable.GetNodeID()),
	)

	resp, err := node.queryCoord.GetReplicas(ctx, req)
	if err != nil {
		log.Error("Failed to get replicas from Query Coordinator",
			zap.Error(err))
		resp.Status.ErrorCode = commonpb.ErrorCode_UnexpectedError
		resp.Status.Reason = err.Error()
		return resp, nil
	}
	log.Debug("received get replicas response",
		zap.Any("resp", resp),
		zap.Error(err))
	return resp, nil
}

// GetCompactionState gets the compaction state of multiple segments
func (node *Proxy) GetCompactionState(ctx context.Context, req *milvuspb.GetCompactionStateRequest) (*milvuspb.GetCompactionStateResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetCompactionState")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.Int64("compactionID", req.GetCompactionID()))

	log.Debug("received GetCompactionState request")
	resp := &milvuspb.GetCompactionStateResponse{}
	if !node.checkHealthy() {
		resp.Status = unhealthyStatus()
		return resp, nil
	}

	resp, err := node.dataCoord.GetCompactionState(ctx, req)
	log.Debug("received GetCompactionState response",
		zap.Any("resp", resp),
		zap.Error(err))
	return resp, err
}

// ManualCompaction invokes compaction on specified collection
func (node *Proxy) ManualCompaction(ctx context.Context, req *milvuspb.ManualCompactionRequest) (*milvuspb.ManualCompactionResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-ManualCompaction")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.Int64("collectionID", req.GetCollectionID()))

	log.Info("received ManualCompaction request")
	resp := &milvuspb.ManualCompactionResponse{}
	if !node.checkHealthy() {
		resp.Status = unhealthyStatus()
		return resp, nil
	}

	resp, err := node.dataCoord.ManualCompaction(ctx, req)
	log.Info("received ManualCompaction response",
		zap.Any("resp", resp),
		zap.Error(err))
	return resp, err
}

// GetCompactionStateWithPlans returns the compactions states with the given plan ID
func (node *Proxy) GetCompactionStateWithPlans(ctx context.Context, req *milvuspb.GetCompactionPlansRequest) (*milvuspb.GetCompactionPlansResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetCompactionStateWithPlans")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.Int64("compactionID", req.GetCompactionID()))

	log.Debug("received GetCompactionStateWithPlans request")
	resp := &milvuspb.GetCompactionPlansResponse{}
	if !node.checkHealthy() {
		resp.Status = unhealthyStatus()
		return resp, nil
	}

	resp, err := node.dataCoord.GetCompactionStateWithPlans(ctx, req)
	log.Debug("received GetCompactionStateWithPlans response",
		zap.Any("resp", resp),
		zap.Error(err))
	return resp, err
}

// GetFlushState gets the flush state of multiple segments
func (node *Proxy) GetFlushState(ctx context.Context, req *milvuspb.GetFlushStateRequest) (*milvuspb.GetFlushStateResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetFlushState")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("received get flush state request",
		zap.Any("request", req))
	var err error
	resp := &milvuspb.GetFlushStateResponse{}
	if !node.checkHealthy() {
		resp.Status = unhealthyStatus()
		log.Warn("unable to get flush state because of closed server")
		return resp, nil
	}

	resp, err = node.dataCoord.GetFlushState(ctx, req)
	if err != nil {
		log.Warn("failed to get flush state response",
			zap.Error(err))
		return nil, err
	}
	log.Debug("received get flush state response",
		zap.Any("response", resp))
	return resp, err
}

// checkHealthy checks proxy state is Healthy
func (node *Proxy) checkHealthy() bool {
	code := node.stateCode.Load().(commonpb.StateCode)
	return code == commonpb.StateCode_Healthy
}

func (node *Proxy) checkHealthyAndReturnCode() (commonpb.StateCode, bool) {
	code := node.stateCode.Load().(commonpb.StateCode)
	return code, code == commonpb.StateCode_Healthy
}

// unhealthyStatus returns the proxy not healthy status
func unhealthyStatus() *commonpb.Status {
	return &commonpb.Status{
		ErrorCode: commonpb.ErrorCode_UnexpectedError,
		Reason:    "proxy not healthy",
	}
}

// Import data files(json, numpy, etc.) on MinIO/S3 storage, read and parse them into sealed segments
func (node *Proxy) Import(ctx context.Context, req *milvuspb.ImportRequest) (*milvuspb.ImportResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-Import")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Info("received import request",
		zap.String("collection name", req.GetCollectionName()),
		zap.String("partition name", req.GetPartitionName()),
		zap.Strings("files", req.GetFiles()))
	resp := &milvuspb.ImportResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_Success,
			Reason:    "",
		},
	}
	if !node.checkHealthy() {
		resp.Status = unhealthyStatus()
		return resp, nil
	}

	err := importutil.ValidateOptions(req.GetOptions())
	if err != nil {
		log.Error("failed to execute import request",
			zap.Error(err))
		resp.Status.ErrorCode = commonpb.ErrorCode_UnexpectedError
		resp.Status.Reason = "request options is not illegal    \n" + err.Error() + "    \nIllegal option format    \n" + importutil.OptionFormat
		return resp, nil
	}

	method := "Import"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	// Call rootCoord to finish import.
	respFromRC, err := node.rootCoord.Import(ctx, req)
	if err != nil {
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		log.Error("failed to execute bulk insert request",
			zap.Error(err))
		resp.Status.ErrorCode = commonpb.ErrorCode_UnexpectedError
		resp.Status.Reason = err.Error()
		return resp, nil
	}

	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return respFromRC, nil
}

// GetImportState checks import task state from RootCoord.
func (node *Proxy) GetImportState(ctx context.Context, req *milvuspb.GetImportStateRequest) (*milvuspb.GetImportStateResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-GetImportState")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("received get import state request",
		zap.Int64("taskID", req.GetTask()))
	resp := &milvuspb.GetImportStateResponse{}
	if !node.checkHealthy() {
		resp.Status = unhealthyStatus()
		return resp, nil
	}
	method := "GetImportState"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()

	resp, err := node.rootCoord.GetImportState(ctx, req)
	if err != nil {
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		log.Error("failed to execute get import state",
			zap.Error(err))
		resp.Status.ErrorCode = commonpb.ErrorCode_UnexpectedError
		resp.Status.Reason = err.Error()
		return resp, nil
	}

	log.Debug("successfully received get import state response",
		zap.Int64("taskID", req.GetTask()),
		zap.Any("resp", resp), zap.Error(err))
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return resp, nil
}

// ListImportTasks get id array of all import tasks from rootcoord
func (node *Proxy) ListImportTasks(ctx context.Context, req *milvuspb.ListImportTasksRequest) (*milvuspb.ListImportTasksResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-ListImportTasks")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("received list import tasks request")
	resp := &milvuspb.ListImportTasksResponse{}
	if !node.checkHealthy() {
		resp.Status = unhealthyStatus()
		return resp, nil
	}
	method := "ListImportTasks"
	tr := timerecord.NewTimeRecorder(method)
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method,
		metrics.TotalLabel).Inc()
	resp, err := node.rootCoord.ListImportTasks(ctx, req)
	if err != nil {
		metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.FailLabel).Inc()
		log.Error("failed to execute list import tasks",
			zap.Error(err))
		resp.Status.ErrorCode = commonpb.ErrorCode_UnexpectedError
		resp.Status.Reason = err.Error()
		return resp, nil
	}

	log.Debug("successfully received list import tasks response",
		zap.String("collection", req.CollectionName),
		zap.Any("tasks", resp.Tasks))
	metrics.ProxyFunctionCall.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method, metrics.SuccessLabel).Inc()
	metrics.ProxyReqLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), method).Observe(float64(tr.ElapseSpan().Milliseconds()))
	return resp, err
}

// InvalidateCredentialCache invalidate the credential cache of specified username.
func (node *Proxy) InvalidateCredentialCache(ctx context.Context, request *proxypb.InvalidateCredCacheRequest) (*commonpb.Status, error) {
	ctx = logutil.WithModule(ctx, moduleName)

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-InvalidateCredentialCache")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("username", request.Username))

	log.Debug("received request to invalidate credential cache")
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	username := request.Username
	if globalMetaCache != nil {
		globalMetaCache.RemoveCredential(username) // no need to return error, though credential may be not cached
	}
	log.Debug("complete to invalidate credential cache")

	return &commonpb.Status{
		ErrorCode: commonpb.ErrorCode_Success,
		Reason:    "",
	}, nil
}

// UpdateCredentialCache update the credential cache of specified username.
func (node *Proxy) UpdateCredentialCache(ctx context.Context, request *proxypb.UpdateCredCacheRequest) (*commonpb.Status, error) {
	ctx = logutil.WithModule(ctx, moduleName)

	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-UpdateCredentialCache")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole),
		zap.String("username", request.Username))

	log.Debug("received request to update credential cache")
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	credInfo := &internalpb.CredentialInfo{
		Username:       request.Username,
		Sha256Password: request.Password,
	}
	if globalMetaCache != nil {
		globalMetaCache.UpdateCredential(credInfo) // no need to return error, though credential may be not cached
	}
	log.Debug("complete to update credential cache")

	return &commonpb.Status{
		ErrorCode: commonpb.ErrorCode_Success,
		Reason:    "",
	}, nil
}

func (node *Proxy) CreateCredential(ctx context.Context, req *milvuspb.CreateCredentialRequest) (*commonpb.Status, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-CreateCredential")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.String("username", req.Username))

	log.Debug("CreateCredential",
		zap.String("role", typeutil.ProxyRole))
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}
	// validate params
	username := req.Username
	if err := ValidateUsername(username); err != nil {
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_IllegalArgument,
			Reason:    err.Error(),
		}, nil
	}
	rawPassword, err := crypto.Base64Decode(req.Password)
	if err != nil {
		log.Error("decode password fail",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_CreateCredentialFailure,
			Reason:    "decode password fail key:" + req.Username,
		}, nil
	}
	if err = ValidatePassword(rawPassword); err != nil {
		log.Error("illegal password",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_IllegalArgument,
			Reason:    err.Error(),
		}, nil
	}
	encryptedPassword, err := crypto.PasswordEncrypt(rawPassword)
	if err != nil {
		log.Error("encrypt password fail",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_CreateCredentialFailure,
			Reason:    "encrypt password fail key:" + req.Username,
		}, nil
	}

	credInfo := &internalpb.CredentialInfo{
		Username:          req.Username,
		EncryptedPassword: encryptedPassword,
		Sha256Password:    crypto.SHA256(rawPassword, req.Username),
	}
	result, err := node.rootCoord.CreateCredential(ctx, credInfo)
	if err != nil { // for error like conntext timeout etc.
		log.Error("create credential fail",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}
	return result, err
}

func (node *Proxy) UpdateCredential(ctx context.Context, req *milvuspb.UpdateCredentialRequest) (*commonpb.Status, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-UpdateCredential")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.String("username", req.Username))

	log.Debug("UpdateCredential",
		zap.String("role", typeutil.ProxyRole))
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}
	rawOldPassword, err := crypto.Base64Decode(req.OldPassword)
	if err != nil {
		log.Error("decode old password fail",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UpdateCredentialFailure,
			Reason:    "decode old password fail when updating:" + req.Username,
		}, nil
	}
	rawNewPassword, err := crypto.Base64Decode(req.NewPassword)
	if err != nil {
		log.Error("decode password fail",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UpdateCredentialFailure,
			Reason:    "decode password fail when updating:" + req.Username,
		}, nil
	}
	// valid new password
	if err = ValidatePassword(rawNewPassword); err != nil {
		log.Error("illegal password",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_IllegalArgument,
			Reason:    err.Error(),
		}, nil
	}

	if !passwordVerify(ctx, req.Username, rawOldPassword, globalMetaCache) {
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UpdateCredentialFailure,
			Reason:    "old password is not correct:" + req.Username,
		}, nil
	}
	// update meta data
	encryptedPassword, err := crypto.PasswordEncrypt(rawNewPassword)
	if err != nil {
		log.Error("encrypt password fail",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UpdateCredentialFailure,
			Reason:    "encrypt password fail when updating:" + req.Username,
		}, nil
	}
	updateCredReq := &internalpb.CredentialInfo{
		Username:          req.Username,
		Sha256Password:    crypto.SHA256(rawNewPassword, req.Username),
		EncryptedPassword: encryptedPassword,
	}
	result, err := node.rootCoord.UpdateCredential(ctx, updateCredReq)
	if err != nil { // for error like conntext timeout etc.
		log.Error("update credential fail",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}
	return result, err
}

func (node *Proxy) DeleteCredential(ctx context.Context, req *milvuspb.DeleteCredentialRequest) (*commonpb.Status, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-DeleteCredential")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.String("username", req.Username))

	log.Debug("DeleteCredential",
		zap.String("role", typeutil.ProxyRole))
	if !node.checkHealthy() {
		return unhealthyStatus(), nil
	}

	if req.Username == util.UserRoot {
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_DeleteCredentialFailure,
			Reason:    "user root cannot be deleted",
		}, nil
	}
	result, err := node.rootCoord.DeleteCredential(ctx, req)
	if err != nil { // for error like conntext timeout etc.
		log.Error("delete credential fail",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}
	return result, err
}

func (node *Proxy) ListCredUsers(ctx context.Context, req *milvuspb.ListCredUsersRequest) (*milvuspb.ListCredUsersResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-ListCredUsers")
	defer sp.Finish()

	log := log.Ctx(ctx).With(
		zap.String("role", typeutil.ProxyRole))

	log.Debug("ListCredUsers")
	if !node.checkHealthy() {
		return &milvuspb.ListCredUsersResponse{Status: unhealthyStatus()}, nil
	}
	rootCoordReq := &milvuspb.ListCredUsersRequest{
		Base: commonpbutil.NewMsgBase(
			commonpbutil.WithMsgType(commonpb.MsgType_ListCredUsernames),
		),
	}
	resp, err := node.rootCoord.ListCredUsers(ctx, rootCoordReq)
	if err != nil {
		return &milvuspb.ListCredUsersResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}
	return &milvuspb.ListCredUsersResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_Success,
		},
		Usernames: resp.Usernames,
	}, nil
}

func (node *Proxy) CreateRole(ctx context.Context, req *milvuspb.CreateRoleRequest) (*commonpb.Status, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-CreateRole")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("CreateRole",
		zap.Any("req", req))
	if code, ok := node.checkHealthyAndReturnCode(); !ok {
		return errorutil.UnhealthyStatus(code), nil
	}

	var roleName string
	if req.Entity != nil {
		roleName = req.Entity.Name
	}
	if err := ValidateRoleName(roleName); err != nil {
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_IllegalArgument,
			Reason:    err.Error(),
		}, nil
	}

	result, err := node.rootCoord.CreateRole(ctx, req)
	if err != nil {
		log.Error("fail to create role",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}
	return result, nil
}

func (node *Proxy) DropRole(ctx context.Context, req *milvuspb.DropRoleRequest) (*commonpb.Status, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-DropRole")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("DropRole",
		zap.Any("req", req))
	if code, ok := node.checkHealthyAndReturnCode(); !ok {
		return errorutil.UnhealthyStatus(code), nil
	}
	if err := ValidateRoleName(req.RoleName); err != nil {
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_IllegalArgument,
			Reason:    err.Error(),
		}, nil
	}
	if IsDefaultRole(req.RoleName) {
		errMsg := fmt.Sprintf("the role[%s] is a default role, which can't be droped", req.RoleName)
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_IllegalArgument,
			Reason:    errMsg,
		}, nil
	}
	result, err := node.rootCoord.DropRole(ctx, req)
	if err != nil {
		log.Error("fail to drop role",
			zap.String("role_name", req.RoleName),
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}
	return result, nil
}

func (node *Proxy) OperateUserRole(ctx context.Context, req *milvuspb.OperateUserRoleRequest) (*commonpb.Status, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-OperateUserRole")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("OperateUserRole",
		zap.Any("req", req))
	if code, ok := node.checkHealthyAndReturnCode(); !ok {
		return errorutil.UnhealthyStatus(code), nil
	}
	if err := ValidateUsername(req.Username); err != nil {
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_IllegalArgument,
			Reason:    err.Error(),
		}, nil
	}
	if err := ValidateRoleName(req.RoleName); err != nil {
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_IllegalArgument,
			Reason:    err.Error(),
		}, nil
	}

	result, err := node.rootCoord.OperateUserRole(ctx, req)
	if err != nil {
		logger.Error("fail to operate user role",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}
	return result, nil
}

func (node *Proxy) SelectRole(ctx context.Context, req *milvuspb.SelectRoleRequest) (*milvuspb.SelectRoleResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-SelectRole")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("SelectRole", zap.Any("req", req))
	if code, ok := node.checkHealthyAndReturnCode(); !ok {
		return &milvuspb.SelectRoleResponse{Status: errorutil.UnhealthyStatus(code)}, nil
	}

	if req.Role != nil {
		if err := ValidateRoleName(req.Role.Name); err != nil {
			return &milvuspb.SelectRoleResponse{
				Status: &commonpb.Status{
					ErrorCode: commonpb.ErrorCode_IllegalArgument,
					Reason:    err.Error(),
				},
			}, nil
		}
	}

	result, err := node.rootCoord.SelectRole(ctx, req)
	if err != nil {
		log.Error("fail to select role",
			zap.Error(err))
		return &milvuspb.SelectRoleResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}
	return result, nil
}

func (node *Proxy) SelectUser(ctx context.Context, req *milvuspb.SelectUserRequest) (*milvuspb.SelectUserResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-SelectUser")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("SelectUser",
		zap.Any("req", req))
	if code, ok := node.checkHealthyAndReturnCode(); !ok {
		return &milvuspb.SelectUserResponse{Status: errorutil.UnhealthyStatus(code)}, nil
	}

	if req.User != nil {
		if err := ValidateUsername(req.User.Name); err != nil {
			return &milvuspb.SelectUserResponse{
				Status: &commonpb.Status{
					ErrorCode: commonpb.ErrorCode_IllegalArgument,
					Reason:    err.Error(),
				},
			}, nil
		}
	}

	result, err := node.rootCoord.SelectUser(ctx, req)
	if err != nil {
		log.Error("fail to select user",
			zap.Error(err))
		return &milvuspb.SelectUserResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}
	return result, nil
}

func (node *Proxy) validPrivilegeParams(req *milvuspb.OperatePrivilegeRequest) error {
	if req.Entity == nil {
		return fmt.Errorf("the entity in the request is nil")
	}
	if req.Entity.Grantor == nil {
		return fmt.Errorf("the grantor entity in the grant entity is nil")
	}
	if req.Entity.Grantor.Privilege == nil {
		return fmt.Errorf("the privilege entity in the grantor entity is nil")
	}
	if err := ValidatePrivilege(req.Entity.Grantor.Privilege.Name); err != nil {
		return err
	}
	if req.Entity.Object == nil {
		return fmt.Errorf("the resource entity in the grant entity is nil")
	}
	if err := ValidateObjectType(req.Entity.Object.Name); err != nil {
		return err
	}
	if err := ValidateObjectName(req.Entity.ObjectName); err != nil {
		return err
	}
	if req.Entity.Role == nil {
		return fmt.Errorf("the object entity in the grant entity is nil")
	}
	if err := ValidateRoleName(req.Entity.Role.Name); err != nil {
		return err
	}

	return nil
}

func (node *Proxy) OperatePrivilege(ctx context.Context, req *milvuspb.OperatePrivilegeRequest) (*commonpb.Status, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-OperatePrivilege")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("OperatePrivilege",
		zap.Any("req", req))
	if code, ok := node.checkHealthyAndReturnCode(); !ok {
		return errorutil.UnhealthyStatus(code), nil
	}
	if err := node.validPrivilegeParams(req); err != nil {
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_IllegalArgument,
			Reason:    err.Error(),
		}, nil
	}
	curUser, err := GetCurUserFromContext(ctx)
	if err != nil {
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}
	req.Entity.Grantor.User = &milvuspb.UserEntity{Name: curUser}
	result, err := node.rootCoord.OperatePrivilege(ctx, req)
	if err != nil {
		log.Error("fail to operate privilege",
			zap.Error(err))
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_UnexpectedError,
			Reason:    err.Error(),
		}, nil
	}
	return result, nil
}

func (node *Proxy) validGrantParams(req *milvuspb.SelectGrantRequest) error {
	if req.Entity == nil {
		return fmt.Errorf("the grant entity in the request is nil")
	}

	if req.Entity.Object != nil {
		if err := ValidateObjectType(req.Entity.Object.Name); err != nil {
			return err
		}

		if err := ValidateObjectName(req.Entity.ObjectName); err != nil {
			return err
		}
	}

	if req.Entity.Role == nil {
		return fmt.Errorf("the role entity in the grant entity is nil")
	}

	if err := ValidateRoleName(req.Entity.Role.Name); err != nil {
		return err
	}

	return nil
}

func (node *Proxy) SelectGrant(ctx context.Context, req *milvuspb.SelectGrantRequest) (*milvuspb.SelectGrantResponse, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-SelectGrant")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("SelectGrant",
		zap.Any("req", req))
	if code, ok := node.checkHealthyAndReturnCode(); !ok {
		return &milvuspb.SelectGrantResponse{Status: errorutil.UnhealthyStatus(code)}, nil
	}

	if err := node.validGrantParams(req); err != nil {
		return &milvuspb.SelectGrantResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_IllegalArgument,
				Reason:    err.Error(),
			},
		}, nil
	}

	result, err := node.rootCoord.SelectGrant(ctx, req)
	if err != nil {
		log.Error("fail to select grant",
			zap.Error(err))
		return &milvuspb.SelectGrantResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_UnexpectedError,
				Reason:    err.Error(),
			},
		}, nil
	}
	return result, nil
}

func (node *Proxy) RefreshPolicyInfoCache(ctx context.Context, req *proxypb.RefreshPolicyInfoCacheRequest) (*commonpb.Status, error) {
	sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-RefreshPolicyInfoCache")
	defer sp.Finish()

	log := log.Ctx(ctx)

	log.Debug("RefreshPrivilegeInfoCache",
		zap.Any("req", req))
	if code, ok := node.checkHealthyAndReturnCode(); !ok {
		return errorutil.UnhealthyStatus(code), errorutil.UnhealthyError()
	}

	if globalMetaCache != nil {
		err := globalMetaCache.RefreshPolicyInfo(typeutil.CacheOp{
			OpType: typeutil.CacheOpType(req.OpType),
			OpKey:  req.OpKey,
		})
		if err != nil {
			log.Error("fail to refresh policy info",
				zap.Error(err))
			return &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_RefreshPolicyInfoCacheFailure,
				Reason:    err.Error(),
			}, err
		}
	}
	log.Debug("RefreshPrivilegeInfoCache success")

	return &commonpb.Status{
		ErrorCode: commonpb.ErrorCode_Success,
	}, nil
}

// SetRates limits the rates of requests.
func (node *Proxy) SetRates(ctx context.Context, request *proxypb.SetRatesRequest) (*commonpb.Status, error) {
	resp := &commonpb.Status{
		ErrorCode: commonpb.ErrorCode_UnexpectedError,
	}
	if !node.checkHealthy() {
		resp = unhealthyStatus()
		return resp, nil
	}

	err := node.multiRateLimiter.globalRateLimiter.setRates(request.GetRates())
	// TODO: set multiple rate limiter rates
	if err != nil {
		resp.Reason = err.Error()
		return resp, nil
	}
	resp.ErrorCode = commonpb.ErrorCode_Success
	return resp, nil
}

func (node *Proxy) CheckHealth(ctx context.Context, request *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
	if !node.checkHealthy() {
		reason := errorutil.UnHealthReason("proxy", node.session.ServerID, "proxy is unhealthy")
		return &milvuspb.CheckHealthResponse{
			Status:    unhealthyStatus(),
			IsHealthy: false,
			Reasons:   []string{reason}}, nil
	}

	group, ctx := errgroup.WithContext(ctx)
	errReasons := make([]string, 0)

	mu := &sync.Mutex{}
	fn := func(role string, resp *milvuspb.CheckHealthResponse, err error) error {
		mu.Lock()
		defer mu.Unlock()

		sp, ctx := trace.StartSpanFromContextWithOperationName(ctx, "Proxy-RefreshPolicyInfoCache")
		defer sp.Finish()

		log := log.Ctx(ctx).With(zap.String("role", role))

		if err != nil {
			log.Warn("check health fail",
				zap.Error(err))
			errReasons = append(errReasons, fmt.Sprintf("check health fail for %s", role))
			return err
		}

		if !resp.IsHealthy {
			log.Warn("check health fail")
			errReasons = append(errReasons, resp.Reasons...)
		}
		return nil
	}

	group.Go(func() error {
		resp, err := node.rootCoord.CheckHealth(ctx, request)
		return fn("rootcoord", resp, err)
	})

	group.Go(func() error {
		resp, err := node.queryCoord.CheckHealth(ctx, request)
		return fn("querycoord", resp, err)
	})

	group.Go(func() error {
		resp, err := node.dataCoord.CheckHealth(ctx, request)
		return fn("datacoord", resp, err)
	})

	group.Go(func() error {
		resp, err := node.indexCoord.CheckHealth(ctx, request)
		return fn("indexcoord", resp, err)
	})

	err := group.Wait()
	if err != nil || len(errReasons) != 0 {
		return &milvuspb.CheckHealthResponse{
			IsHealthy: false,
			Reasons:   errReasons,
		}, nil
	}

	return &milvuspb.CheckHealthResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_Success,
			Reason:    "",
		},
		IsHealthy: true,
	}, nil
}