Merge remote-tracking branch 'source/0.5.0' into branch-0.5.0

Former-commit-id: 008715764397ee10fbbfd6e67218fce68b68b515

core/coverage.sh

@@ -114,15 +114,15 @@ ${LCOV_CMD} -r "${FILE_INFO_OUTPUT}" -o "${FILE_INFO_OUTPUT_NEW}" \
     "/usr/*" \
     "*/boost/*" \
     "*/cmake_build/*_ep-prefix/*" \
-    "src/index/cmake_build*" \
-    "src/index/thirdparty*" \
-    "src/grpc*"\
-    "src/metrics/MetricBase.h"\
-    "src/server/Server.cpp"\
-    "src/server/DBWrapper.cpp"\
-    "src/server/grpc_impl/GrpcServer.cpp"\
-    "src/utils/easylogging++.h"\
-    "src/utils/easylogging++.cc"\
+    "*/src/index/cmake_build*" \
+    "*/src/index/thirdparty*" \
+    "*/src/grpc*" \
+    "*/src/metrics/MetricBase.h" \
+    "*/src/server/Server.cpp" \
+    "*/src/server/DBWrapper.cpp" \
+    "*/src/server/grpc_impl/GrpcServer.cpp" \
+    "*/src/utils/easylogging++.h" \
+    "*/src/utils/easylogging++.cc"
 
 # gen html report
 ${LCOV_GEN_CMD} "${FILE_INFO_OUTPUT_NEW}" --output-directory ${DIR_LCOV_OUTPUT}/

core/src/db/engine/ExecutionEngineImpl.cpp

@@ -164,6 +164,9 @@ ExecutionEngineImpl::HybridLoad() const {
         quantizer_conf->mode = 1;
         quantizer_conf->gpu_id = best_device_id;
         auto quantizer = index_->LoadQuantizer(quantizer_conf);
+        if (quantizer == nullptr) {
+            ENGINE_LOG_ERROR << "quantizer is nullptr";
+        }
         index_->SetQuantizer(quantizer);
         auto cache_quantizer = std::make_shared<CachedQuantizer>(quantizer);
         cache::GpuCacheMgr::GetInstance(best_device_id)->InsertItem(key, cache_quantizer);

core/src/wrapper/VecIndex.h

@@ -25,6 +25,7 @@
 #include "knowhere/common/BinarySet.h"
 #include "knowhere/common/Config.h"
 #include "knowhere/index/vector_index/Quantizer.h"
+#include "utils/Log.h"
 #include "utils/Status.h"
 
 namespace milvus {
@@ -101,6 +102,7 @@ class VecIndex : public cache::DataObj {
     ////////////////
     virtual knowhere::QuantizerPtr
     LoadQuantizer(const Config& conf) {
+        ENGINE_LOG_ERROR << "LoadQuantizer virtual funciton called.";
         return nullptr;
     }