// 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 querycoord

import (
	"context"
	"encoding/json"
	"errors"
	"testing"
	"time"

	"go.uber.org/zap"

	"github.com/milvus-io/milvus/internal/common"
	"github.com/milvus-io/milvus/internal/log"
	"github.com/milvus-io/milvus/internal/util/sessionutil"

	"github.com/stretchr/testify/assert"

	"github.com/milvus-io/milvus/internal/proto/commonpb"
	"github.com/milvus-io/milvus/internal/proto/internalpb"
	"github.com/milvus-io/milvus/internal/proto/milvuspb"
	"github.com/milvus-io/milvus/internal/proto/querypb"
	"github.com/milvus-io/milvus/internal/util/metricsinfo"
)

func waitLoadPartitionDone(ctx context.Context, queryCoord *QueryCoord, collectionID UniqueID, partitionIDs []UniqueID) error {
	for {
		showPartitionReq := &querypb.ShowPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowPartitions,
			},
			CollectionID: collectionID,
			PartitionIDs: partitionIDs,
		}

		res, err := queryCoord.ShowPartitions(ctx, showPartitionReq)
		if err != nil || res.Status.ErrorCode != commonpb.ErrorCode_Success {
			return errors.New("showPartitions failed")
		}

		loadDone := true
		for _, percent := range res.InMemoryPercentages {
			if percent < 100 {
				loadDone = false
			}
		}
		if loadDone {
			break
		}
	}

	return nil
}

func waitLoadCollectionDone(ctx context.Context, queryCoord *QueryCoord, collectionID UniqueID) error {
	for {
		showCollectionReq := &querypb.ShowCollectionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowPartitions,
			},
			CollectionIDs: []UniqueID{collectionID},
		}

		res, err := queryCoord.ShowCollections(ctx, showCollectionReq)
		if err != nil || res.Status.ErrorCode != commonpb.ErrorCode_Success {
			return errors.New("showCollection failed")
		}

		loadDone := len(res.InMemoryPercentages) > 0
		for _, percent := range res.InMemoryPercentages {
			if percent < 100 {
				loadDone = false
			}
		}
		if loadDone {
			break
		}

		time.Sleep(500 * time.Millisecond)
	}

	return nil
}

func waitLoadCollectionRollbackDone(queryCoord *QueryCoord, collectionID UniqueID) bool {
	maxRetryNum := 100

	for cnt := 0; cnt < maxRetryNum; cnt++ {
		_, err := queryCoord.meta.getCollectionInfoByID(collectionID)
		if err != nil {
			return true
		}
		log.Debug("waiting for rollback done...")
		time.Sleep(100 * time.Millisecond)
	}

	return false
}

func TestGrpcTask(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)

	t.Run("Test ShowParsOnNotLoadedCol", func(t *testing.T) {
		res, err := queryCoord.ShowPartitions(ctx, &querypb.ShowPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
			CollectionID: defaultCollectionID,
			PartitionIDs: []UniqueID{defaultPartitionID},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test LoadEmptyPartition", func(t *testing.T) {
		status, err := queryCoord.LoadPartitions(ctx, &querypb.LoadPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_LoadPartitions,
			},
			CollectionID:  defaultCollectionID,
			Schema:        genDefaultCollectionSchema(false),
			ReplicaNumber: 1,
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test LoadPartition", func(t *testing.T) {
		status, err := queryCoord.LoadPartitions(ctx, &querypb.LoadPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_LoadPartitions,
			},
			CollectionID:  defaultCollectionID,
			PartitionIDs:  []UniqueID{defaultPartitionID},
			Schema:        genDefaultCollectionSchema(false),
			ReplicaNumber: 1,
		})
		assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ShowPartitions", func(t *testing.T) {
		res, err := queryCoord.ShowPartitions(ctx, &querypb.ShowPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
			CollectionID: defaultCollectionID,
			PartitionIDs: []UniqueID{defaultPartitionID},
		})
		assert.Equal(t, commonpb.ErrorCode_Success, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ShowNotLoadedPartitions", func(t *testing.T) {
		res, err := queryCoord.ShowPartitions(ctx, &querypb.ShowPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
			CollectionID: defaultCollectionID,
			PartitionIDs: []UniqueID{-1},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ShowAllPartitions", func(t *testing.T) {
		res, err := queryCoord.ShowPartitions(ctx, &querypb.ShowPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
			CollectionID: defaultCollectionID,
		})
		assert.Equal(t, commonpb.ErrorCode_Success, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test GetPartitionStates", func(t *testing.T) {
		res, err := queryCoord.GetPartitionStates(ctx, &querypb.GetPartitionStatesRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_GetPartitionStatistics,
			},
			CollectionID: defaultCollectionID,
			PartitionIDs: []UniqueID{defaultPartitionID},
		})
		assert.Equal(t, commonpb.ErrorCode_Success, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ReleaseEmptyPartitions", func(t *testing.T) {
		status, err := queryCoord.ReleasePartitions(ctx, &querypb.ReleasePartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleasePartitions,
			},
			CollectionID: defaultCollectionID,
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ReleaseNotExistPartition", func(t *testing.T) {
		status, err := queryCoord.ReleasePartitions(ctx, &querypb.ReleasePartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleasePartitions,
			},
			CollectionID: defaultCollectionID,
			PartitionIDs: []UniqueID{-1},
		})
		assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ReleasePartition", func(t *testing.T) {
		status, err := queryCoord.ReleasePartitions(ctx, &querypb.ReleasePartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleasePartitions,
			},
			CollectionID: defaultCollectionID,
			PartitionIDs: []UniqueID{defaultPartitionID},
		})
		assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test LoadCollection", func(t *testing.T) {
		status, err := queryCoord.LoadCollection(ctx, &querypb.LoadCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_LoadCollection,
			},
			CollectionID:  defaultCollectionID,
			Schema:        genDefaultCollectionSchema(false),
			ReplicaNumber: 1,
		})
		assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
		assert.Nil(t, err)
	})

	//t.Run("Test LoadParAfterLoadCol", func(t *testing.T) {
	//	status, err := queryCoord.LoadPartitions(ctx, &querypb.LoadPartitionsRequest{
	//		Base: &commonpb.MsgBase{
	//			MsgType: commonpb.MsgType_LoadPartitions,
	//		},
	//		CollectionID: defaultCollectionID,
	//		PartitionIDs: []UniqueID{defaultPartitionID},
	//		Schema:       genDefaultCollectionSchema(defaultCollectionID, false),
	//	})
	//	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	//	assert.Nil(t, err)
	//})

	t.Run("Test ShowCollections", func(t *testing.T) {
		res, err := queryCoord.ShowCollections(ctx, &querypb.ShowCollectionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
			CollectionIDs: []UniqueID{defaultCollectionID},
		})
		assert.Equal(t, commonpb.ErrorCode_Success, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ShowNotLoadedCollections", func(t *testing.T) {
		res, err := queryCoord.ShowCollections(ctx, &querypb.ShowCollectionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
			CollectionIDs: []UniqueID{-1},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ShowAllCollections", func(t *testing.T) {
		res, err := queryCoord.ShowCollections(ctx, &querypb.ShowCollectionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
		})
		assert.Equal(t, commonpb.ErrorCode_Success, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test GetSegmentInfo", func(t *testing.T) {
		err := waitLoadCollectionDone(ctx, queryCoord, defaultCollectionID)
		assert.NoError(t, err)
		time.Sleep(3 * time.Second)

		res, err := queryCoord.GetSegmentInfo(ctx, &querypb.GetSegmentInfoRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_SegmentInfo,
			},
			SegmentIDs: []UniqueID{defaultSegmentID},
		})
		assert.Equal(t, commonpb.ErrorCode_Success, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ReleaseParOfNotLoadedCol", func(t *testing.T) {
		status, err := queryCoord.ReleasePartitions(ctx, &querypb.ReleasePartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleasePartitions,
			},
			CollectionID: -1,
			PartitionIDs: []UniqueID{defaultPartitionID},
		})
		assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ReleaseNotExistCollection", func(t *testing.T) {
		status, err := queryCoord.ReleaseCollection(ctx, &querypb.ReleaseCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleaseCollection,
			},
			CollectionID: -1,
		})
		assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ReleaseCollection", func(t *testing.T) {
		status, err := queryCoord.ReleaseCollection(ctx, &querypb.ReleaseCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleaseCollection,
			},
			CollectionID: defaultCollectionID,
		})
		assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test GetStatisticsChannel", func(t *testing.T) {
		_, err = queryCoord.GetStatisticsChannel(ctx)
		assert.Nil(t, err)
	})

	t.Run("Test GetTimeTickChannel", func(t *testing.T) {
		_, err = queryCoord.GetTimeTickChannel(ctx)
		assert.Nil(t, err)
	})

	t.Run("Test GetComponentStates", func(t *testing.T) {
		states, err := queryCoord.GetComponentStates(ctx)
		assert.Equal(t, commonpb.ErrorCode_Success, states.Status.ErrorCode)
		assert.Equal(t, internalpb.StateCode_Healthy, states.State.StateCode)
		assert.Nil(t, err)
	})

	t.Run("Test LoadBalance", func(t *testing.T) {
		res, err := queryCoord.LoadBalance(ctx, &querypb.LoadBalanceRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_LoadBalanceSegments,
			},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test GetMetrics", func(t *testing.T) {
		metricReq := make(map[string]string)
		metricReq[metricsinfo.MetricTypeKey] = "system_info"
		req, err := json.Marshal(metricReq)
		assert.Nil(t, err)
		res, err := queryCoord.GetMetrics(ctx, &milvuspb.GetMetricsRequest{
			Base:    &commonpb.MsgBase{},
			Request: string(req),
		})

		assert.Nil(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, res.Status.ErrorCode)
	})

	t.Run("Test InvalidMetricType", func(t *testing.T) {
		metricReq := make(map[string]string)
		metricReq["invalidKey"] = "invalidValue"
		req, err := json.Marshal(metricReq)
		assert.Nil(t, err)
		res, err := queryCoord.GetMetrics(ctx, &milvuspb.GetMetricsRequest{
			Base:    &commonpb.MsgBase{},
			Request: string(req),
		})

		assert.Nil(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)

		metricReq = make(map[string]string)
		metricReq[metricsinfo.MetricTypeKey] = "invalid"
		req, err = json.Marshal(metricReq)
		assert.Nil(t, err)
		res, err = queryCoord.GetMetrics(ctx, &milvuspb.GetMetricsRequest{
			Base:    &commonpb.MsgBase{},
			Request: string(req),
		})

		assert.Nil(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
	})

	err = node.stop()
	err = removeNodeSession(node.queryNodeID)
	assert.Nil(t, err)
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func TestGrpcTaskEnqueueFail(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	queryNode, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	taskIDAllocator := queryCoord.scheduler.taskIDAllocator
	failedAllocator := func() (UniqueID, error) {
		return 0, errors.New("scheduler failed to allocate ID")
	}

	queryCoord.scheduler.taskIDAllocator = failedAllocator

	waitQueryNodeOnline(queryCoord.cluster, queryNode.queryNodeID)
	assert.NotEmpty(t, queryCoord.cluster.OnlineNodeIDs())

	t.Run("Test LoadPartition", func(t *testing.T) {
		status, err := queryCoord.LoadPartitions(ctx, &querypb.LoadPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_LoadPartitions,
			},
			CollectionID:  defaultCollectionID,
			PartitionIDs:  []UniqueID{defaultPartitionID},
			Schema:        genDefaultCollectionSchema(false),
			ReplicaNumber: 1,
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test LoadCollection", func(t *testing.T) {
		status, err := queryCoord.LoadCollection(ctx, &querypb.LoadCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_LoadCollection,
			},
			CollectionID:  defaultCollectionID,
			Schema:        genDefaultCollectionSchema(false),
			ReplicaNumber: 1,
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
		assert.Nil(t, err)
	})

	queryCoord.scheduler.taskIDAllocator = taskIDAllocator
	status, err := queryCoord.LoadCollection(ctx, &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	})
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	queryCoord.scheduler.taskIDAllocator = failedAllocator

	t.Run("Test ReleaseCollection", func(t *testing.T) {
		status, err := queryCoord.ReleaseCollection(ctx, &querypb.ReleaseCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleaseCollection,
			},
			CollectionID: defaultCollectionID,
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
		assert.Nil(t, err)
	})

	queryCoord.scheduler.taskIDAllocator = taskIDAllocator
	status, err = queryCoord.ReleaseCollection(ctx, &querypb.ReleaseCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleaseCollection,
		},
		CollectionID: defaultCollectionID,
	})

	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	status, err = queryCoord.LoadPartitions(ctx, &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	})

	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	queryCoord.scheduler.taskIDAllocator = failedAllocator

	t.Run("Test ReleasePartition", func(t *testing.T) {
		status, err := queryCoord.ReleasePartitions(ctx, &querypb.ReleasePartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleasePartitions,
			},
			CollectionID: defaultCollectionID,
			PartitionIDs: []UniqueID{defaultPartitionID},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test LoadBalance", func(t *testing.T) {
		status, err := queryCoord.LoadBalance(ctx, &querypb.LoadBalanceRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleaseCollection,
			},
		})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
	})

	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func TestLoadBalanceTask(t *testing.T) {
	refreshParams()
	baseCtx := context.Background()

	queryCoord, err := startQueryCoord(baseCtx)
	assert.Nil(t, err)

	queryNode1, err := startQueryNodeServer(baseCtx)
	assert.Nil(t, err)

	queryNode2, err := startQueryNodeServer(baseCtx)
	assert.Nil(t, err)

	time.Sleep(100 * time.Millisecond)
	res, err := queryCoord.LoadCollection(baseCtx, &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	})
	assert.Nil(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, res.ErrorCode)

	time.Sleep(100 * time.Millisecond)
	for {
		collectionInfo := queryCoord.meta.showCollections()
		if collectionInfo[0].InMemoryPercentage == 100 {
			break
		}
	}
	nodeID := queryNode1.queryNodeID
	queryCoord.cluster.StopNode(nodeID)
	loadBalanceSegment := &querypb.LoadBalanceRequest{
		Base: &commonpb.MsgBase{
			MsgType:  commonpb.MsgType_LoadBalanceSegments,
			SourceID: nodeID,
		},
		SourceNodeIDs: []int64{nodeID},
		BalanceReason: querypb.TriggerCondition_NodeDown,
	}

	loadBalanceTask := &loadBalanceTask{
		baseTask: &baseTask{
			ctx:              baseCtx,
			condition:        newTaskCondition(baseCtx),
			triggerCondition: querypb.TriggerCondition_NodeDown,
		},
		LoadBalanceRequest: loadBalanceSegment,
		broker:             queryCoord.broker,
		cluster:            queryCoord.cluster,
		meta:               queryCoord.meta,
	}
	queryCoord.scheduler.Enqueue(loadBalanceTask)

	res, err = queryCoord.ReleaseCollection(baseCtx, &querypb.ReleaseCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleaseCollection,
		},
		CollectionID: defaultCollectionID,
	})
	assert.Nil(t, err)

	queryNode1.stop()
	queryNode2.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func TestGrpcTaskBeforeHealthy(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	unHealthyCoord, err := startUnHealthyQueryCoord(ctx)
	assert.Nil(t, err)

	t.Run("Test LoadPartition", func(t *testing.T) {
		status, err := unHealthyCoord.LoadPartitions(ctx, &querypb.LoadPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_LoadPartitions,
			},
			CollectionID:  defaultCollectionID,
			PartitionIDs:  []UniqueID{defaultPartitionID},
			Schema:        genDefaultCollectionSchema(false),
			ReplicaNumber: 1,
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ShowPartitions", func(t *testing.T) {
		res, err := unHealthyCoord.ShowPartitions(ctx, &querypb.ShowPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
			CollectionID: defaultCollectionID,
			PartitionIDs: []UniqueID{defaultPartitionID},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ShowAllPartitions", func(t *testing.T) {
		res, err := unHealthyCoord.ShowPartitions(ctx, &querypb.ShowPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
			CollectionID: defaultCollectionID,
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test GetPartitionStates", func(t *testing.T) {
		res, err := unHealthyCoord.GetPartitionStates(ctx, &querypb.GetPartitionStatesRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_GetPartitionStatistics,
			},
			CollectionID: defaultCollectionID,
			PartitionIDs: []UniqueID{defaultPartitionID},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test LoadCollection", func(t *testing.T) {
		status, err := unHealthyCoord.LoadCollection(ctx, &querypb.LoadCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_LoadCollection,
			},
			CollectionID:  defaultCollectionID,
			Schema:        genDefaultCollectionSchema(false),
			ReplicaNumber: 1,
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ShowCollections", func(t *testing.T) {
		res, err := unHealthyCoord.ShowCollections(ctx, &querypb.ShowCollectionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
			CollectionIDs: []UniqueID{defaultCollectionID},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test ShowAllCollections", func(t *testing.T) {
		res, err := unHealthyCoord.ShowCollections(ctx, &querypb.ShowCollectionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ShowCollections,
			},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test GetSegmentInfo", func(t *testing.T) {
		res, err := unHealthyCoord.GetSegmentInfo(ctx, &querypb.GetSegmentInfoRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_SegmentInfo,
			},
			SegmentIDs: []UniqueID{defaultSegmentID},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test LoadBalance", func(t *testing.T) {
		res, err := unHealthyCoord.LoadBalance(ctx, &querypb.LoadBalanceRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_LoadBalanceSegments,
			},
		})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.ErrorCode)
	})

	t.Run("Test ReleasePartition", func(t *testing.T) {
		status, err := unHealthyCoord.ReleasePartitions(ctx, &querypb.ReleasePartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleasePartitions,
			},
			CollectionID: defaultCollectionID,
			PartitionIDs: []UniqueID{defaultPartitionID},
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
		assert.Nil(t, err)

	})

	t.Run("Test ReleaseCollection", func(t *testing.T) {
		status, err := unHealthyCoord.ReleaseCollection(ctx, &querypb.ReleaseCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_ReleaseCollection,
			},
			CollectionID: defaultCollectionID,
		})
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
		assert.Nil(t, err)
	})

	t.Run("Test GetComponentStates", func(t *testing.T) {
		states, err := unHealthyCoord.GetComponentStates(ctx)
		assert.Equal(t, commonpb.ErrorCode_Success, states.Status.ErrorCode)
		assert.Equal(t, internalpb.StateCode_Abnormal, states.State.StateCode)
		assert.Nil(t, err)
	})

	t.Run("Test GetMetrics", func(t *testing.T) {
		metricReq := make(map[string]string)
		metricReq[metricsinfo.MetricTypeKey] = "system_info"
		req, err := json.Marshal(metricReq)
		assert.Nil(t, err)
		res, err := unHealthyCoord.GetMetrics(ctx, &milvuspb.GetMetricsRequest{
			Base:    &commonpb.MsgBase{},
			Request: string(req),
		})

		assert.Nil(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, res.Status.ErrorCode)
	})

	t.Run("Test GetReplicas", func(t *testing.T) {
		resp, err := unHealthyCoord.GetReplicas(ctx, &milvuspb.GetReplicasRequest{
			Base:         &commonpb.MsgBase{},
			CollectionID: defaultCollectionID,
		})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, resp.Status.ErrorCode)
	})

	t.Run("Test GetShardLeaders", func(t *testing.T) {
		resp, err := unHealthyCoord.GetShardLeaders(ctx, &querypb.GetShardLeadersRequest{
			Base:         &commonpb.MsgBase{},
			CollectionID: defaultCollectionID,
		})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, resp.Status.ErrorCode)
	})

	unHealthyCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func TestQueryCoord_GetComponentStates(t *testing.T) {
	n := &QueryCoord{}
	n.stateCode.Store(internalpb.StateCode_Healthy)
	resp, err := n.GetComponentStates(context.Background())
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	assert.Equal(t, common.NotRegisteredID, resp.State.NodeID)
	n.session = &sessionutil.Session{}
	n.session.UpdateRegistered(true)
	resp, err = n.GetComponentStates(context.Background())
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
}

func Test_RepeatedLoadSameCollection(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadCollectionReq := &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	//first load defaultCollectionID
	status, err := queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadCollectionDone(ctx, queryCoord, defaultCollectionID)

	// second load defaultCollectionID
	status, err = queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func Test_LoadCollectionAndLoadPartitions(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadCollectionReq := &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	loadPartitionReq := &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	//first load defaultCollectionID
	status, err := queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadCollectionDone(ctx, queryCoord, defaultCollectionID)

	// second load defaultPartitionID
	status, err = queryCoord.LoadPartitions(ctx, loadPartitionReq)
	assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func TestLoadCollectionWithReplicas(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node1, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	node2, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node1.queryNodeID)
	waitQueryNodeOnline(queryCoord.cluster, node2.queryNodeID)
	loadCollectionReq := &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 3,
	}

	// load collection with 3 replicas, but no enough querynodes
	assert.Equal(t, 2, len(queryCoord.cluster.OnlineNodeIDs()))
	status, err := queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)

	// Now it should can load collection with 3 replicas
	node3, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	waitQueryNodeOnline(queryCoord.cluster, node3.queryNodeID)

	status, err = queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	waitLoadCollectionDone(ctx, queryCoord, defaultCollectionID)
	replicas, err := queryCoord.meta.getReplicasByCollectionID(loadCollectionReq.CollectionID)
	assert.NoError(t, err)
	for i := range replicas {
		log.Info("replicas",
			zap.Int64("collectionID", replicas[i].CollectionID),
			zap.Int64("id", replicas[i].ReplicaID),
			zap.Int64s("nodeIds", replicas[i].NodeIds))
	}
	assert.Equal(t, 3, len(replicas))
	for i := range replicas {
		assert.Equal(t, loadCollectionReq.CollectionID, replicas[i].CollectionID)
	}

	// Load the loaded collection with different replica number should fail
	loadCollectionReq.ReplicaNumber = 2
	status, err = queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_IllegalArgument, status.ErrorCode)

	status, err = queryCoord.ReleaseCollection(ctx, &querypb.ReleaseCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleaseCollection,
		},
		CollectionID: loadCollectionReq.CollectionID,
	})
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)

	node1.stop()
	node2.stop()
	node3.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func TestLoadPartitionsWithReplicas(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node1, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	node2, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node1.queryNodeID)
	waitQueryNodeOnline(queryCoord.cluster, node2.queryNodeID)
	loadPartitionsReq := &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 3,
	}

	// load collection with 3 replicas, but no enough querynodes
	assert.Equal(t, 2, len(queryCoord.cluster.OnlineNodeIDs()))
	status, err := queryCoord.LoadPartitions(ctx, loadPartitionsReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)

	// Now it should can load collection with 3 replicas
	node3, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	waitQueryNodeOnline(queryCoord.cluster, node3.queryNodeID)

	status, err = queryCoord.LoadPartitions(ctx, loadPartitionsReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	waitLoadPartitionDone(ctx, queryCoord,
		loadPartitionsReq.CollectionID, loadPartitionsReq.PartitionIDs)

	// Load the loaded partitions with different replica number should fail
	loadPartitionsReq.ReplicaNumber = 2
	status, err = queryCoord.LoadPartitions(ctx, loadPartitionsReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_IllegalArgument, status.ErrorCode)

	status, err = queryCoord.ReleasePartitions(ctx, &querypb.ReleasePartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleaseCollection,
		},
		CollectionID: loadPartitionsReq.CollectionID,
		PartitionIDs: loadPartitionsReq.PartitionIDs,
	})
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)

	node1.stop()
	node2.stop()
	node3.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func TestLoadCollectionSyncSegmentsFail(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	defer removeAllSession()

	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)
	defer queryCoord.Stop()

	node1, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	waitQueryNodeOnline(queryCoord.cluster, node1.queryNodeID)
	defer node1.stop()
	node1.syncReplicaSegments = returnFailedResult

	// Failed to sync segments should cause rollback
	loadCollectionReq := &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}
	status, err := queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)

	// Wait for rollback done
	rollbackDone := waitLoadCollectionRollbackDone(queryCoord, loadCollectionReq.CollectionID)
	assert.True(t, rollbackDone)

	assert.NoError(t, node1.stop())
	assert.NoError(t, queryCoord.Stop())
	assert.NoError(t, removeAllSession())
}

func Test_RepeatedLoadSamePartitions(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadPartitionReq := &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	//first load defaultPartitionID
	status, err := queryCoord.LoadPartitions(ctx, loadPartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadPartitionDone(ctx, queryCoord, defaultCollectionID, []UniqueID{defaultPartitionID})

	// second load defaultPartitionID
	status, err = queryCoord.LoadPartitions(ctx, loadPartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func Test_RepeatedLoadDifferentPartitions(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadPartitionReq := &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	//first load defaultPartitionID
	status, err := queryCoord.LoadPartitions(ctx, loadPartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	assert.Nil(t, waitLoadPartitionDone(ctx, queryCoord, defaultCollectionID, []UniqueID{defaultPartitionID}))

	// second load defaultPartitionID+1
	failLoadRequest := &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID + 1},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}
	status, err = queryCoord.LoadPartitions(ctx, failLoadRequest)
	assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func Test_LoadPartitionsAndLoadCollection(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadCollectionReq := &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	loadPartitionReq := &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	//first load defaultPartitionID
	status, err := queryCoord.LoadPartitions(ctx, loadPartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadPartitionDone(ctx, queryCoord, defaultCollectionID, []UniqueID{defaultPartitionID})

	// second load defaultCollectionID
	status, err = queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func Test_LoadAndReleaseCollection(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadCollectionReq := &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	releaseCollectionReq := &querypb.ReleaseCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleaseCollection,
		},
		CollectionID: defaultCollectionID,
	}

	//first load defaultCollectionID
	status, err := queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadCollectionDone(ctx, queryCoord, defaultCollectionID)

	// second release defaultCollectionID
	status, err = queryCoord.ReleaseCollection(ctx, releaseCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func Test_LoadAndReleasePartitions(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadPartitionReq := &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	releasePartitionReq := &querypb.ReleasePartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleasePartitions,
		},
		CollectionID: defaultCollectionID,
		PartitionIDs: []UniqueID{defaultPartitionID},
	}

	//first load defaultPartitionID
	status, err := queryCoord.LoadPartitions(ctx, loadPartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadPartitionDone(ctx, queryCoord, defaultCollectionID, []UniqueID{defaultPartitionID})

	// second release defaultPartitionID
	status, err = queryCoord.ReleasePartitions(ctx, releasePartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func Test_LoadCollectionAndReleasePartitions(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadCollectionReq := &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	releasePartitionReq := &querypb.ReleasePartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleasePartitions,
		},
		CollectionID: defaultCollectionID,
		PartitionIDs: []UniqueID{defaultPartitionID},
	}

	//first load defaultCollectionID
	status, err := queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadCollectionDone(ctx, queryCoord, defaultCollectionID)

	// second release defaultPartitionID
	status, err = queryCoord.ReleasePartitions(ctx, releasePartitionReq)
	assert.Equal(t, commonpb.ErrorCode_UnexpectedError, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func Test_LoadPartitionsAndReleaseCollection(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadPartitionReq := &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}
	releaseCollectionReq := &querypb.ReleaseCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleaseCollection,
		},
		CollectionID: defaultCollectionID,
	}

	//first load defaultPartitionID
	status, err := queryCoord.LoadPartitions(ctx, loadPartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadPartitionDone(ctx, queryCoord, defaultCollectionID, []UniqueID{defaultPartitionID})

	// second release defaultCollectionID
	status, err = queryCoord.ReleaseCollection(ctx, releaseCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func Test_RepeatedReleaseCollection(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadCollectionReq := &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	releaseCollectionReq := &querypb.ReleaseCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleaseCollection,
		},
		CollectionID: defaultCollectionID,
	}

	// load defaultCollectionID
	status, err := queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadCollectionDone(ctx, queryCoord, defaultCollectionID)

	// first release defaultCollectionID
	status, err = queryCoord.ReleaseCollection(ctx, releaseCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	// second release defaultCollectionID
	status, err = queryCoord.ReleaseCollection(ctx, releaseCollectionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func Test_RepeatedReleaseSamePartitions(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadPartitionReq := &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	releasePartitionReq := &querypb.ReleasePartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleasePartitions,
		},
		CollectionID: defaultCollectionID,
		PartitionIDs: []UniqueID{defaultPartitionID},
	}

	// load defaultPartitionID
	status, err := queryCoord.LoadPartitions(ctx, loadPartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadPartitionDone(ctx, queryCoord, defaultCollectionID, []UniqueID{defaultPartitionID})

	// first release defaultPartitionID
	status, err = queryCoord.ReleasePartitions(ctx, releasePartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	// second release defaultPartitionID
	status, err = queryCoord.ReleasePartitions(ctx, releasePartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func Test_RepeatedReleaseDifferentPartitions(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)

	waitQueryNodeOnline(queryCoord.cluster, node.queryNodeID)
	loadPartitionReq := &querypb.LoadPartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadPartitions,
		},
		CollectionID:  defaultCollectionID,
		PartitionIDs:  []UniqueID{defaultPartitionID, defaultPartitionID + 1},
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 1,
	}

	releasePartitionReq := &querypb.ReleasePartitionsRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_ReleasePartitions,
		},
		CollectionID: defaultCollectionID,
		PartitionIDs: []UniqueID{defaultPartitionID},
	}

	// load defaultPartitionID and defaultPartitionID+1
	status, err := queryCoord.LoadPartitions(ctx, loadPartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)
	waitLoadPartitionDone(ctx, queryCoord, defaultCollectionID, []UniqueID{defaultPartitionID, defaultPartitionID + 1})

	// first release defaultPartitionID
	status, err = queryCoord.ReleasePartitions(ctx, releasePartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	// second release defaultPartitionID+1
	releasePartitionReq.PartitionIDs = []UniqueID{defaultPartitionID + 1}
	status, err = queryCoord.ReleasePartitions(ctx, releasePartitionReq)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	assert.Nil(t, err)

	node.stop()
	queryCoord.Stop()
	err = removeAllSession()
	assert.Nil(t, err)
}

func TestGetReplicas(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)

	node1, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	node2, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	node3, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	node4, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	waitQueryNodeOnline(queryCoord.cluster, node1.queryNodeID)
	waitQueryNodeOnline(queryCoord.cluster, node2.queryNodeID)
	waitQueryNodeOnline(queryCoord.cluster, node3.queryNodeID)
	waitQueryNodeOnline(queryCoord.cluster, node4.queryNodeID)

	// First, load collection with replicas
	loadCollectionReq := &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 3,
	}
	status, err := queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	waitLoadCollectionDone(ctx, queryCoord, defaultCollectionID)
	time.Sleep(200 * time.Millisecond)

	getReplicasReq := &milvuspb.GetReplicasRequest{
		Base:         &commonpb.MsgBase{},
		CollectionID: loadCollectionReq.CollectionID,
	}
	resp, err := queryCoord.GetReplicas(ctx, getReplicasReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	assert.Equal(t, 3, len(resp.Replicas))
	for i := range resp.Replicas {
		for j := 0; j < i; j++ {
			assert.NotEqual(t,
				resp.Replicas[i].NodeIds[0],
				resp.Replicas[j].NodeIds[0])
		}
	}

	getReplicasReq.WithShardNodes = true
	resp, err = queryCoord.GetReplicas(ctx, getReplicasReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	assert.Equal(t, 3, len(resp.Replicas))
	sawNodes := make(map[UniqueID]struct{})
	for i, replica := range resp.Replicas {
		addNodes := make(map[UniqueID]struct{})
		assert.Greater(t, len(replica.NodeIds), 0)
		assert.Greater(t, len(replica.ShardReplicas), 0)
		for _, shard := range replica.ShardReplicas {
			assert.Equal(t,
				shard.NodeIds[0],
				shard.LeaderID)
			assert.Greater(t, len(shard.NodeIds), 0)

			for _, nodeID := range shard.NodeIds {
				_, ok := sawNodes[nodeID]
				assert.False(t, ok)

				addNodes[nodeID] = struct{}{}
			}
		}

		for nodeID := range addNodes {
			sawNodes[nodeID] = struct{}{}
		}

		for j := 0; j < i; j++ {
			assert.NotEqual(t,
				replica.NodeIds[0],
				resp.Replicas[j].NodeIds[0])
		}
	}

	// GetReplicas after release collection, it should return meta failed
	status, err = queryCoord.ReleaseCollection(ctx, &querypb.ReleaseCollectionRequest{
		Base:         &commonpb.MsgBase{},
		CollectionID: loadCollectionReq.CollectionID,
	})
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)

	resp, err = queryCoord.GetReplicas(ctx, getReplicasReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_MetaFailed, resp.Status.ErrorCode)

	node1.stop()
	node2.stop()
	node3.stop()
	node4.stop()
	queryCoord.Stop()
}

func TestGetShardLeaders(t *testing.T) {
	refreshParams()
	ctx := context.Background()
	queryCoord, err := startQueryCoord(ctx)
	assert.Nil(t, err)
	defer queryCoord.Stop()

	node1, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	node2, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	node3, err := startQueryNodeServer(ctx)
	assert.Nil(t, err)
	waitQueryNodeOnline(queryCoord.cluster, node1.queryNodeID)
	waitQueryNodeOnline(queryCoord.cluster, node2.queryNodeID)
	waitQueryNodeOnline(queryCoord.cluster, node3.queryNodeID)
	defer node1.stop()
	defer node2.stop()
	defer node3.stop()
	defer removeAllSession()

	// First, load collection with replicas
	loadCollectionReq := &querypb.LoadCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType: commonpb.MsgType_LoadCollection,
		},
		CollectionID:  defaultCollectionID,
		Schema:        genDefaultCollectionSchema(false),
		ReplicaNumber: 3,
	}
	status, err := queryCoord.LoadCollection(ctx, loadCollectionReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
	waitLoadCollectionDone(ctx, queryCoord, defaultCollectionID)

	getShardLeadersReq := &querypb.GetShardLeadersRequest{
		Base:         &commonpb.MsgBase{},
		CollectionID: loadCollectionReq.CollectionID,
	}
	resp, err := queryCoord.GetShardLeaders(ctx, getShardLeadersReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)

	totalLeaders := 0
	for i := 0; i < len(resp.Shards); i++ {
		totalLeaders += len(resp.Shards[i].NodeIds)
		assert.Equal(t, 3, len(resp.Shards[i].NodeIds))
	}
	assert.Equal(t, 0, totalLeaders%3)

	// mock replica all down, without triggering load balance
	mockCluster := NewMockCluster(queryCoord.cluster)
	mockCluster.isOnlineHandler = func(nodeID int64) (bool, error) {
		return false, nil
	}
	queryCoord.cluster = mockCluster
	resp, err = queryCoord.GetShardLeaders(ctx, getShardLeadersReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_NoReplicaAvailable, resp.Status.ErrorCode)

	// TODO(yah01): Disable the unit test case for now,
	// restore it after the rebalance between replicas feature is implemented

	// Filter out unavailable shard
	// err = node1.stop()
	// assert.NoError(t, err)
	// err = removeNodeSession(node1.queryNodeID)
	// assert.NoError(t, err)
	// waitAllQueryNodeOffline(queryCoord.cluster, []int64{node1.queryNodeID})
	// resp, err = queryCoord.GetShardLeaders(ctx, getShardLeadersReq)
	// assert.NoError(t, err)
	// assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	// for i := 0; i < len(resp.Shards); i++ {
	// 	assert.Equal(t, 2, len(resp.Shards[i].NodeIds))
	// }

	// node4, err := startQueryNodeServer(ctx)
	// assert.NoError(t, err)
	// waitQueryNodeOnline(queryCoord.cluster, node4.queryNodeID)
	// defer node4.stop()

	// GetShardLeaders after release collection, it should return meta failed
	status, err = queryCoord.ReleaseCollection(ctx, &querypb.ReleaseCollectionRequest{
		Base:         &commonpb.MsgBase{},
		CollectionID: loadCollectionReq.CollectionID,
	})
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)

	resp, err = queryCoord.GetShardLeaders(ctx, getShardLeadersReq)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_MetaFailed, resp.Status.ErrorCode)
}