diff --git a/internal/proxy/collection_task_test.go b/internal/proxy/collection_task_test.go
deleted file mode 100644
index 12da8e82fa..0000000000
--- a/internal/proxy/collection_task_test.go
+++ /dev/null
@@ -1,269 +0,0 @@
-// Copyright (C) 2019-2020 Zilliz. All rights reserved.
-//
-// Licensed 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"
-	"strconv"
-	"testing"
-	"time"
-
-	"github.com/milvus-io/milvus/internal/proto/schemapb"
-
-	"github.com/milvus-io/milvus/internal/proto/commonpb"
-
-	"github.com/milvus-io/milvus/internal/util/uniquegenerator"
-
-	"github.com/stretchr/testify/assert"
-
-	"github.com/golang/protobuf/proto"
-
-	"github.com/milvus-io/milvus/internal/util/funcutil"
-
-	"github.com/milvus-io/milvus/internal/proto/milvuspb"
-)
-
-func TestCreateCollectionTask(t *testing.T) {
-	Params.Init()
-
-	rc := NewRootCoordMock()
-	ctx := context.Background()
-	shardsNum := int32(2)
-	prefix := "TestCreateCollectionTask"
-	dbName := ""
-	collectionName := prefix + funcutil.GenRandomStr()
-	int64Field := "int64"
-	floatVecField := "fvec"
-	dim := 128
-
-	schema := constructCollectionSchema(int64Field, floatVecField, dim, collectionName)
-	var marshaledSchema []byte
-	marshaledSchema, err := proto.Marshal(schema)
-	assert.NoError(t, err)
-
-	task := &createCollectionTask{
-		Condition: NewTaskCondition(ctx),
-		CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
-			Base:           nil,
-			DbName:         dbName,
-			CollectionName: collectionName,
-			Schema:         marshaledSchema,
-			ShardsNum:      shardsNum,
-		},
-		ctx:       ctx,
-		rootCoord: rc,
-		result:    nil,
-		schema:    nil,
-	}
-
-	t.Run("on enqueue", func(t *testing.T) {
-		err := task.OnEnqueue()
-		assert.NoError(t, err)
-		assert.Equal(t, commonpb.MsgType_CreateCollection, task.Type())
-	})
-
-	t.Run("ctx", func(t *testing.T) {
-		traceCtx := task.TraceCtx()
-		assert.NotNil(t, traceCtx)
-	})
-
-	t.Run("id", func(t *testing.T) {
-		id := UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt())
-		task.SetID(id)
-		assert.Equal(t, id, task.ID())
-	})
-
-	t.Run("name", func(t *testing.T) {
-		assert.Equal(t, CreateCollectionTaskName, task.Name())
-	})
-
-	t.Run("ts", func(t *testing.T) {
-		ts := Timestamp(time.Now().UnixNano())
-		task.SetTs(ts)
-		assert.Equal(t, ts, task.BeginTs())
-		assert.Equal(t, ts, task.EndTs())
-	})
-
-	t.Run("process task", func(t *testing.T) {
-		var err error
-
-		err = task.PreExecute(ctx)
-		assert.NoError(t, err)
-
-		err = task.Execute(ctx)
-		assert.NoError(t, err)
-		assert.Equal(t, commonpb.ErrorCode_Success, task.result.ErrorCode)
-
-		// recreate -> fail
-		err = task.Execute(ctx)
-		assert.NoError(t, err)
-		assert.NotEqual(t, commonpb.ErrorCode_Success, task.result.ErrorCode)
-
-		err = task.PostExecute(ctx)
-		assert.NoError(t, err)
-	})
-
-	t.Run("PreExecute", func(t *testing.T) {
-		var err error
-
-		err = task.PreExecute(ctx)
-		assert.NoError(t, err)
-
-		task.Schema = []byte{0x1, 0x2, 0x3, 0x4}
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-		task.Schema = marshaledSchema
-
-		task.ShardsNum = Params.MaxShardNum + 1
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-		task.ShardsNum = shardsNum
-
-		reqBackup := proto.Clone(task.CreateCollectionRequest).(*milvuspb.CreateCollectionRequest)
-		schemaBackup := proto.Clone(schema).(*schemapb.CollectionSchema)
-
-		schemaWithTooManyFields := &schemapb.CollectionSchema{
-			Name:        collectionName,
-			Description: "",
-			AutoID:      false,
-			Fields:      make([]*schemapb.FieldSchema, Params.MaxFieldNum+1),
-		}
-		marshaledSchemaWithTooManyFields, err := proto.Marshal(schemaWithTooManyFields)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = marshaledSchemaWithTooManyFields
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-
-		task.CreateCollectionRequest = reqBackup
-
-		// ValidateCollectionName
-
-		schema.Name = " " // empty
-		emptyNameSchema, err := proto.Marshal(schema)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = emptyNameSchema
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-
-		schema.Name = prefix
-		for i := 0; i < int(Params.MaxNameLength); i++ {
-			schema.Name += strconv.Itoa(i % 10)
-		}
-		tooLongNameSchema, err := proto.Marshal(schema)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = tooLongNameSchema
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-
-		schema.Name = "$" // invalid first char
-		invalidFirstCharSchema, err := proto.Marshal(schema)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = invalidFirstCharSchema
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-
-		// ValidateDuplicatedFieldName
-		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
-		schema.Fields = append(schema.Fields, schema.Fields[0])
-		duplicatedFieldsSchema, err := proto.Marshal(schema)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = duplicatedFieldsSchema
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-
-		// ValidatePrimaryKey
-		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
-		for idx := range schema.Fields {
-			schema.Fields[idx].IsPrimaryKey = false
-		}
-		noPrimaryFieldsSchema, err := proto.Marshal(schema)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = noPrimaryFieldsSchema
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-
-		// ValidateFieldName
-		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
-		for idx := range schema.Fields {
-			schema.Fields[idx].Name = "$"
-		}
-		invalidFieldNameSchema, err := proto.Marshal(schema)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = invalidFieldNameSchema
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-
-		// ValidateVectorField
-		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
-		for idx := range schema.Fields {
-			if schema.Fields[idx].DataType == schemapb.DataType_FloatVector ||
-				schema.Fields[idx].DataType == schemapb.DataType_BinaryVector {
-				schema.Fields[idx].TypeParams = nil
-			}
-		}
-		noDimSchema, err := proto.Marshal(schema)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = noDimSchema
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-
-		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
-		for idx := range schema.Fields {
-			if schema.Fields[idx].DataType == schemapb.DataType_FloatVector ||
-				schema.Fields[idx].DataType == schemapb.DataType_BinaryVector {
-				schema.Fields[idx].TypeParams = []*commonpb.KeyValuePair{
-					{
-						Key:   "dim",
-						Value: "not int",
-					},
-				}
-			}
-		}
-		dimNotIntSchema, err := proto.Marshal(schema)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = dimNotIntSchema
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-
-		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
-		for idx := range schema.Fields {
-			if schema.Fields[idx].DataType == schemapb.DataType_FloatVector ||
-				schema.Fields[idx].DataType == schemapb.DataType_BinaryVector {
-				schema.Fields[idx].TypeParams = []*commonpb.KeyValuePair{
-					{
-						Key:   "dim",
-						Value: strconv.Itoa(int(Params.MaxDimension) + 1),
-					},
-				}
-			}
-		}
-		tooLargeDimSchema, err := proto.Marshal(schema)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = tooLargeDimSchema
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-
-		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
-		schema.Fields[1].DataType = schemapb.DataType_BinaryVector
-		schema.Fields[1].TypeParams = []*commonpb.KeyValuePair{
-			{
-				Key:   "dim",
-				Value: strconv.Itoa(int(Params.MaxDimension) + 1),
-			},
-		}
-		binaryTooLargeDimSchema, err := proto.Marshal(schema)
-		assert.NoError(t, err)
-		task.CreateCollectionRequest.Schema = binaryTooLargeDimSchema
-		err = task.PreExecute(ctx)
-		assert.Error(t, err)
-	})
-}
diff --git a/internal/proxy/rootcoord_mock_test.go b/internal/proxy/rootcoord_mock_test.go
index dd3806221c..48ca8b427b 100644
--- a/internal/proxy/rootcoord_mock_test.go
+++ b/internal/proxy/rootcoord_mock_test.go
@@ -137,6 +137,15 @@ func (coord *RootCoordMock) GetComponentStates(ctx context.Context) (*internalpb
 }
 
 func (coord *RootCoordMock) GetStatisticsChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &milvuspb.StringResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+		}, nil
+	}
 	return &milvuspb.StringResponse{
 		Status: &commonpb.Status{
 			ErrorCode: commonpb.ErrorCode_Success,
@@ -151,6 +160,15 @@ func (coord *RootCoordMock) Register() error {
 }
 
 func (coord *RootCoordMock) GetTimeTickChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &milvuspb.StringResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+		}, nil
+	}
 	return &milvuspb.StringResponse{
 		Status: &commonpb.Status{
 			ErrorCode: commonpb.ErrorCode_Success,
@@ -161,6 +179,13 @@ func (coord *RootCoordMock) GetTimeTickChannel(ctx context.Context) (*milvuspb.S
 }
 
 func (coord *RootCoordMock) CreateCollection(ctx context.Context, req *milvuspb.CreateCollectionRequest) (*commonpb.Status, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UnexpectedError,
+			Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+		}, nil
+	}
 	coord.collMtx.Lock()
 	defer coord.collMtx.Unlock()
 
@@ -228,6 +253,13 @@ func (coord *RootCoordMock) CreateCollection(ctx context.Context, req *milvuspb.
 }
 
 func (coord *RootCoordMock) DropCollection(ctx context.Context, req *milvuspb.DropCollectionRequest) (*commonpb.Status, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UnexpectedError,
+			Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+		}, nil
+	}
 	coord.collMtx.Lock()
 	defer coord.collMtx.Unlock()
 
@@ -255,6 +287,16 @@ func (coord *RootCoordMock) DropCollection(ctx context.Context, req *milvuspb.Dr
 }
 
 func (coord *RootCoordMock) HasCollection(ctx context.Context, req *milvuspb.HasCollectionRequest) (*milvuspb.BoolResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &milvuspb.BoolResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+			Value: false,
+		}, nil
+	}
 	coord.collMtx.RLock()
 	defer coord.collMtx.RUnlock()
 
@@ -270,6 +312,17 @@ func (coord *RootCoordMock) HasCollection(ctx context.Context, req *milvuspb.Has
 }
 
 func (coord *RootCoordMock) DescribeCollection(ctx context.Context, req *milvuspb.DescribeCollectionRequest) (*milvuspb.DescribeCollectionResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &milvuspb.DescribeCollectionResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+			Schema:       nil,
+			CollectionID: 0,
+		}, nil
+	}
 	coord.collMtx.RLock()
 	defer coord.collMtx.RUnlock()
 
@@ -300,6 +353,16 @@ func (coord *RootCoordMock) DescribeCollection(ctx context.Context, req *milvusp
 }
 
 func (coord *RootCoordMock) ShowCollections(ctx context.Context, req *milvuspb.ShowCollectionsRequest) (*milvuspb.ShowCollectionsResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &milvuspb.ShowCollectionsResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+			CollectionNames: nil,
+		}, nil
+	}
 	coord.collMtx.RLock()
 	defer coord.collMtx.RUnlock()
 
@@ -333,6 +396,13 @@ func (coord *RootCoordMock) ShowCollections(ctx context.Context, req *milvuspb.S
 }
 
 func (coord *RootCoordMock) CreatePartition(ctx context.Context, req *milvuspb.CreatePartitionRequest) (*commonpb.Status, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UnexpectedError,
+			Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+		}, nil
+	}
 	coord.collMtx.RLock()
 	defer coord.collMtx.RUnlock()
 
@@ -372,6 +442,13 @@ func (coord *RootCoordMock) CreatePartition(ctx context.Context, req *milvuspb.C
 }
 
 func (coord *RootCoordMock) DropPartition(ctx context.Context, req *milvuspb.DropPartitionRequest) (*commonpb.Status, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UnexpectedError,
+			Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+		}, nil
+	}
 	coord.collMtx.RLock()
 	defer coord.collMtx.RUnlock()
 
@@ -404,6 +481,16 @@ func (coord *RootCoordMock) DropPartition(ctx context.Context, req *milvuspb.Dro
 }
 
 func (coord *RootCoordMock) HasPartition(ctx context.Context, req *milvuspb.HasPartitionRequest) (*milvuspb.BoolResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &milvuspb.BoolResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+			Value: false,
+		}, nil
+	}
 	coord.collMtx.RLock()
 	defer coord.collMtx.RUnlock()
 
@@ -432,6 +519,17 @@ func (coord *RootCoordMock) HasPartition(ctx context.Context, req *milvuspb.HasP
 }
 
 func (coord *RootCoordMock) ShowPartitions(ctx context.Context, req *milvuspb.ShowPartitionsRequest) (*milvuspb.ShowPartitionsResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &milvuspb.ShowPartitionsResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("rootcoord is not healthy, state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+			PartitionNames: nil,
+			PartitionIDs:   nil,
+		}, nil
+	}
 	coord.collMtx.RLock()
 	defer coord.collMtx.RUnlock()
 
@@ -477,6 +575,13 @@ func (coord *RootCoordMock) ShowPartitions(ctx context.Context, req *milvuspb.Sh
 }
 
 func (coord *RootCoordMock) CreateIndex(ctx context.Context, req *milvuspb.CreateIndexRequest) (*commonpb.Status, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UnexpectedError,
+			Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+		}, nil
+	}
 	return &commonpb.Status{
 		ErrorCode: commonpb.ErrorCode_Success,
 		Reason:    "",
@@ -484,6 +589,16 @@ func (coord *RootCoordMock) CreateIndex(ctx context.Context, req *milvuspb.Creat
 }
 
 func (coord *RootCoordMock) DescribeIndex(ctx context.Context, req *milvuspb.DescribeIndexRequest) (*milvuspb.DescribeIndexResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &milvuspb.DescribeIndexResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+			IndexDescriptions: nil,
+		}, nil
+	}
 	return &milvuspb.DescribeIndexResponse{
 		Status: &commonpb.Status{
 			ErrorCode: commonpb.ErrorCode_Success,
@@ -494,6 +609,13 @@ func (coord *RootCoordMock) DescribeIndex(ctx context.Context, req *milvuspb.Des
 }
 
 func (coord *RootCoordMock) DropIndex(ctx context.Context, req *milvuspb.DropIndexRequest) (*commonpb.Status, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UnexpectedError,
+			Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+		}, nil
+	}
 	return &commonpb.Status{
 		ErrorCode: commonpb.ErrorCode_Success,
 		Reason:    "",
@@ -501,6 +623,17 @@ func (coord *RootCoordMock) DropIndex(ctx context.Context, req *milvuspb.DropInd
 }
 
 func (coord *RootCoordMock) AllocTimestamp(ctx context.Context, req *rootcoordpb.AllocTimestampRequest) (*rootcoordpb.AllocTimestampResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &rootcoordpb.AllocTimestampResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+			Timestamp: 0,
+			Count:     0,
+		}, nil
+	}
 	coord.lastTsMtx.Lock()
 	defer coord.lastTsMtx.Unlock()
 
@@ -521,6 +654,17 @@ func (coord *RootCoordMock) AllocTimestamp(ctx context.Context, req *rootcoordpb
 }
 
 func (coord *RootCoordMock) AllocID(ctx context.Context, req *rootcoordpb.AllocIDRequest) (*rootcoordpb.AllocIDResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &rootcoordpb.AllocIDResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+			ID:    0,
+			Count: 0,
+		}, nil
+	}
 	begin, _ := uniquegenerator.GetUniqueIntGeneratorIns().GetInts(int(req.Count))
 	return &rootcoordpb.AllocIDResponse{
 		Status: &commonpb.Status{
@@ -533,6 +677,13 @@ func (coord *RootCoordMock) AllocID(ctx context.Context, req *rootcoordpb.AllocI
 }
 
 func (coord *RootCoordMock) UpdateChannelTimeTick(ctx context.Context, req *internalpb.ChannelTimeTickMsg) (*commonpb.Status, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UnexpectedError,
+			Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+		}, nil
+	}
 	return &commonpb.Status{
 		ErrorCode: commonpb.ErrorCode_Success,
 		Reason:    "",
@@ -540,6 +691,16 @@ func (coord *RootCoordMock) UpdateChannelTimeTick(ctx context.Context, req *inte
 }
 
 func (coord *RootCoordMock) DescribeSegment(ctx context.Context, req *milvuspb.DescribeSegmentRequest) (*milvuspb.DescribeSegmentResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &milvuspb.DescribeSegmentResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+			IndexID: 0,
+		}, nil
+	}
 	return &milvuspb.DescribeSegmentResponse{
 		Status: &commonpb.Status{
 			ErrorCode: commonpb.ErrorCode_Success,
@@ -552,6 +713,16 @@ func (coord *RootCoordMock) DescribeSegment(ctx context.Context, req *milvuspb.D
 }
 
 func (coord *RootCoordMock) ShowSegments(ctx context.Context, req *milvuspb.ShowSegmentsRequest) (*milvuspb.ShowSegmentsResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &milvuspb.ShowSegmentsResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+			},
+			SegmentIDs: nil,
+		}, nil
+	}
 	return &milvuspb.ShowSegmentsResponse{
 		Status: &commonpb.Status{
 			ErrorCode: commonpb.ErrorCode_Success,
@@ -562,6 +733,13 @@ func (coord *RootCoordMock) ShowSegments(ctx context.Context, req *milvuspb.Show
 }
 
 func (coord *RootCoordMock) ReleaseDQLMessageStream(ctx context.Context, in *proxypb.ReleaseDQLMessageStreamRequest) (*commonpb.Status, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UnexpectedError,
+			Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+		}, nil
+	}
 	return &commonpb.Status{
 		ErrorCode: commonpb.ErrorCode_Success,
 		Reason:    "",
@@ -569,6 +747,13 @@ func (coord *RootCoordMock) ReleaseDQLMessageStream(ctx context.Context, in *pro
 }
 
 func (coord *RootCoordMock) SegmentFlushCompleted(ctx context.Context, in *datapb.SegmentFlushCompletedMsg) (*commonpb.Status, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+		return &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UnexpectedError,
+			Reason:    fmt.Sprintf("state code = %s", internalpb.StateCode_name[int32(code)]),
+		}, nil
+	}
 	return &commonpb.Status{
 		ErrorCode: commonpb.ErrorCode_Success,
 		Reason:    "",
@@ -576,6 +761,17 @@ func (coord *RootCoordMock) SegmentFlushCompleted(ctx context.Context, in *datap
 }
 
 func (coord *RootCoordMock) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error) {
+	code := coord.state.Load().(internalpb.StateCode)
+	if code != internalpb.StateCode_Healthy {
+
+		return &milvuspb.GetMetricsResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UnexpectedError,
+				Reason:    "failed",
+			},
+			Response: "",
+		}, nil
+	}
 	rootCoordTopology := metricsinfo.RootCoordTopology{
 		Self: metricsinfo.RootCoordInfos{
 			BaseComponentInfos: metricsinfo.BaseComponentInfos{
diff --git a/internal/proxy/task_test.go b/internal/proxy/task_test.go
index 2812c5e57d..f3d1fc0acd 100644
--- a/internal/proxy/task_test.go
+++ b/internal/proxy/task_test.go
@@ -2,9 +2,9 @@ package proxy
 
 import (
 	"context"
-	"fmt"
 	"strconv"
 	"testing"
+	"time"
 
 	"github.com/golang/protobuf/proto"
 	"github.com/milvus-io/milvus/internal/log"
@@ -12,6 +12,8 @@ import (
 	"github.com/milvus-io/milvus/internal/proto/internalpb"
 	"github.com/milvus-io/milvus/internal/proto/milvuspb"
 	"github.com/milvus-io/milvus/internal/proto/schemapb"
+	"github.com/milvus-io/milvus/internal/util/funcutil"
+	"github.com/milvus-io/milvus/internal/util/uniquegenerator"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -59,28 +61,6 @@ func constructCollectionSchema(
 	}
 }
 
-func constructCreateCollectionRequest(
-	schema *schemapb.CollectionSchema,
-	dbName, collectionName string,
-	shardsNum int32,
-) *milvuspb.CreateCollectionRequest {
-	bs, err := proto.Marshal(schema)
-	if err != nil {
-		panic(
-			fmt.Sprintf(
-				"failed to marshal collection schema, schema: %v, error: %v",
-				schema,
-				err))
-	}
-	return &milvuspb.CreateCollectionRequest{
-		Base:           nil,
-		DbName:         dbName,
-		CollectionName: collectionName,
-		Schema:         bs,
-		ShardsNum:      shardsNum,
-	}
-}
-
 func TestGetNumRowsOfScalarField(t *testing.T) {
 	cases := []struct {
 		datas interface{}
@@ -682,3 +662,649 @@ func TestSearchTask(t *testing.T) {
 
 	// TODO, add decode result, reduce result test
 }
+
+func TestCreateCollectionTask(t *testing.T) {
+	Params.Init()
+
+	rc := NewRootCoordMock()
+	rc.Start()
+	ctx := context.Background()
+	shardsNum := int32(2)
+	prefix := "TestCreateCollectionTask"
+	dbName := ""
+	collectionName := prefix + funcutil.GenRandomStr()
+	int64Field := "int64"
+	floatVecField := "fvec"
+	dim := 128
+
+	schema := constructCollectionSchema(int64Field, floatVecField, dim, collectionName)
+	var marshaledSchema []byte
+	marshaledSchema, err := proto.Marshal(schema)
+	assert.NoError(t, err)
+
+	task := &createCollectionTask{
+		Condition: NewTaskCondition(ctx),
+		CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
+			Base:           nil,
+			DbName:         dbName,
+			CollectionName: collectionName,
+			Schema:         marshaledSchema,
+			ShardsNum:      shardsNum,
+		},
+		ctx:       ctx,
+		rootCoord: rc,
+		result:    nil,
+		schema:    nil,
+	}
+
+	t.Run("on enqueue", func(t *testing.T) {
+		err := task.OnEnqueue()
+		assert.NoError(t, err)
+		assert.Equal(t, commonpb.MsgType_CreateCollection, task.Type())
+	})
+
+	t.Run("ctx", func(t *testing.T) {
+		traceCtx := task.TraceCtx()
+		assert.NotNil(t, traceCtx)
+	})
+
+	t.Run("id", func(t *testing.T) {
+		id := UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt())
+		task.SetID(id)
+		assert.Equal(t, id, task.ID())
+	})
+
+	t.Run("name", func(t *testing.T) {
+		assert.Equal(t, CreateCollectionTaskName, task.Name())
+	})
+
+	t.Run("ts", func(t *testing.T) {
+		ts := Timestamp(time.Now().UnixNano())
+		task.SetTs(ts)
+		assert.Equal(t, ts, task.BeginTs())
+		assert.Equal(t, ts, task.EndTs())
+	})
+
+	t.Run("process task", func(t *testing.T) {
+		var err error
+
+		err = task.PreExecute(ctx)
+		assert.NoError(t, err)
+
+		err = task.Execute(ctx)
+		assert.NoError(t, err)
+		assert.Equal(t, commonpb.ErrorCode_Success, task.result.ErrorCode)
+
+		// recreate -> fail
+		err = task.Execute(ctx)
+		assert.NoError(t, err)
+		assert.NotEqual(t, commonpb.ErrorCode_Success, task.result.ErrorCode)
+
+		err = task.PostExecute(ctx)
+		assert.NoError(t, err)
+	})
+
+	t.Run("PreExecute", func(t *testing.T) {
+		var err error
+
+		err = task.PreExecute(ctx)
+		assert.NoError(t, err)
+
+		task.Schema = []byte{0x1, 0x2, 0x3, 0x4}
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+		task.Schema = marshaledSchema
+
+		task.ShardsNum = Params.MaxShardNum + 1
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+		task.ShardsNum = shardsNum
+
+		reqBackup := proto.Clone(task.CreateCollectionRequest).(*milvuspb.CreateCollectionRequest)
+		schemaBackup := proto.Clone(schema).(*schemapb.CollectionSchema)
+
+		schemaWithTooManyFields := &schemapb.CollectionSchema{
+			Name:        collectionName,
+			Description: "",
+			AutoID:      false,
+			Fields:      make([]*schemapb.FieldSchema, Params.MaxFieldNum+1),
+		}
+		marshaledSchemaWithTooManyFields, err := proto.Marshal(schemaWithTooManyFields)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = marshaledSchemaWithTooManyFields
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+
+		task.CreateCollectionRequest = reqBackup
+
+		// ValidateCollectionName
+
+		schema.Name = " " // empty
+		emptyNameSchema, err := proto.Marshal(schema)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = emptyNameSchema
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+
+		schema.Name = prefix
+		for i := 0; i < int(Params.MaxNameLength); i++ {
+			schema.Name += strconv.Itoa(i % 10)
+		}
+		tooLongNameSchema, err := proto.Marshal(schema)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = tooLongNameSchema
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+
+		schema.Name = "$" // invalid first char
+		invalidFirstCharSchema, err := proto.Marshal(schema)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = invalidFirstCharSchema
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+
+		// ValidateDuplicatedFieldName
+		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
+		schema.Fields = append(schema.Fields, schema.Fields[0])
+		duplicatedFieldsSchema, err := proto.Marshal(schema)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = duplicatedFieldsSchema
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+
+		// ValidatePrimaryKey
+		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
+		for idx := range schema.Fields {
+			schema.Fields[idx].IsPrimaryKey = false
+		}
+		noPrimaryFieldsSchema, err := proto.Marshal(schema)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = noPrimaryFieldsSchema
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+
+		// ValidateFieldName
+		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
+		for idx := range schema.Fields {
+			schema.Fields[idx].Name = "$"
+		}
+		invalidFieldNameSchema, err := proto.Marshal(schema)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = invalidFieldNameSchema
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+
+		// ValidateVectorField
+		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
+		for idx := range schema.Fields {
+			if schema.Fields[idx].DataType == schemapb.DataType_FloatVector ||
+				schema.Fields[idx].DataType == schemapb.DataType_BinaryVector {
+				schema.Fields[idx].TypeParams = nil
+			}
+		}
+		noDimSchema, err := proto.Marshal(schema)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = noDimSchema
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+
+		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
+		for idx := range schema.Fields {
+			if schema.Fields[idx].DataType == schemapb.DataType_FloatVector ||
+				schema.Fields[idx].DataType == schemapb.DataType_BinaryVector {
+				schema.Fields[idx].TypeParams = []*commonpb.KeyValuePair{
+					{
+						Key:   "dim",
+						Value: "not int",
+					},
+				}
+			}
+		}
+		dimNotIntSchema, err := proto.Marshal(schema)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = dimNotIntSchema
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+
+		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
+		for idx := range schema.Fields {
+			if schema.Fields[idx].DataType == schemapb.DataType_FloatVector ||
+				schema.Fields[idx].DataType == schemapb.DataType_BinaryVector {
+				schema.Fields[idx].TypeParams = []*commonpb.KeyValuePair{
+					{
+						Key:   "dim",
+						Value: strconv.Itoa(int(Params.MaxDimension) + 1),
+					},
+				}
+			}
+		}
+		tooLargeDimSchema, err := proto.Marshal(schema)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = tooLargeDimSchema
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+
+		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
+		schema.Fields[1].DataType = schemapb.DataType_BinaryVector
+		schema.Fields[1].TypeParams = []*commonpb.KeyValuePair{
+			{
+				Key:   "dim",
+				Value: strconv.Itoa(int(Params.MaxDimension) + 1),
+			},
+		}
+		binaryTooLargeDimSchema, err := proto.Marshal(schema)
+		assert.NoError(t, err)
+		task.CreateCollectionRequest.Schema = binaryTooLargeDimSchema
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+	})
+}
+
+func TestDropCollectionTask(t *testing.T) {
+	Params.Init()
+	rc := NewRootCoordMock()
+	rc.Start()
+	ctx := context.Background()
+	InitMetaCache(rc)
+
+	master := newMockGetChannelsService()
+	query := newMockGetChannelsService()
+	factory := newSimpleMockMsgStreamFactory()
+	channelMgr := newChannelsMgrImpl(master.GetChannels, nil, query.GetChannels, nil, factory)
+	defer channelMgr.removeAllDMLStream()
+
+	prefix := "TestDropCollectionTask"
+	dbName := ""
+	collectionName := prefix + funcutil.GenRandomStr()
+
+	shardsNum := int32(2)
+	int64Field := "int64"
+	floatVecField := "fvec"
+	dim := 128
+
+	schema := constructCollectionSchema(int64Field, floatVecField, dim, collectionName)
+	marshaledSchema, err := proto.Marshal(schema)
+	assert.NoError(t, err)
+
+	createColReq := &milvuspb.CreateCollectionRequest{
+		Base: &commonpb.MsgBase{
+			MsgType:   commonpb.MsgType_DropCollection,
+			MsgID:     100,
+			Timestamp: 100,
+		},
+		DbName:         dbName,
+		CollectionName: collectionName,
+		Schema:         marshaledSchema,
+		ShardsNum:      shardsNum,
+	}
+
+	//CreateCollection
+	task := &dropCollectionTask{
+		Condition: NewTaskCondition(ctx),
+		DropCollectionRequest: &milvuspb.DropCollectionRequest{
+			Base: &commonpb.MsgBase{
+				MsgType:   commonpb.MsgType_DropCollection,
+				MsgID:     100,
+				Timestamp: 100,
+			},
+			DbName:         dbName,
+			CollectionName: collectionName,
+		},
+		ctx:       ctx,
+		chMgr:     channelMgr,
+		rootCoord: rc,
+		result:    nil,
+	}
+	task.PreExecute(ctx)
+
+	assert.Equal(t, commonpb.MsgType_DropCollection, task.Type())
+	assert.Equal(t, UniqueID(100), task.ID())
+	assert.Equal(t, Timestamp(100), task.BeginTs())
+	assert.Equal(t, Timestamp(100), task.EndTs())
+	assert.Equal(t, Params.ProxyID, task.GetBase().GetSourceID())
+	// missing collectionID in globalMetaCache
+	err = task.Execute(ctx)
+	assert.NotNil(t, err)
+	// createCollection in RootCood and fill GlobalMetaCache
+	rc.CreateCollection(ctx, createColReq)
+	globalMetaCache.GetCollectionID(ctx, collectionName)
+
+	// success to drop collection
+	err = task.Execute(ctx)
+	assert.Nil(t, err)
+
+	// illegal name
+	task.CollectionName = "#0xc0de"
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+
+	task.CollectionName = collectionName
+	err = task.PreExecute(ctx)
+	assert.Nil(t, err)
+
+}
+
+func TestHasCollectionTask(t *testing.T) {
+	Params.Init()
+	rc := NewRootCoordMock()
+	rc.Start()
+	ctx := context.Background()
+	InitMetaCache(rc)
+	prefix := "TestHasCollectionTask"
+	dbName := ""
+	collectionName := prefix + funcutil.GenRandomStr()
+
+	shardsNum := int32(2)
+	int64Field := "int64"
+	floatVecField := "fvec"
+	dim := 128
+
+	schema := constructCollectionSchema(int64Field, floatVecField, dim, collectionName)
+	marshaledSchema, err := proto.Marshal(schema)
+	assert.NoError(t, err)
+
+	createColReq := &milvuspb.CreateCollectionRequest{
+		Base: &commonpb.MsgBase{
+			MsgType:   commonpb.MsgType_DropCollection,
+			MsgID:     100,
+			Timestamp: 100,
+		},
+		DbName:         dbName,
+		CollectionName: collectionName,
+		Schema:         marshaledSchema,
+		ShardsNum:      shardsNum,
+	}
+
+	//CreateCollection
+	task := &hasCollectionTask{
+		Condition: NewTaskCondition(ctx),
+		HasCollectionRequest: &milvuspb.HasCollectionRequest{
+			Base: &commonpb.MsgBase{
+				MsgType:   commonpb.MsgType_HasCollection,
+				MsgID:     100,
+				Timestamp: 100,
+			},
+			DbName:         dbName,
+			CollectionName: collectionName,
+		},
+		ctx:       ctx,
+		rootCoord: rc,
+		result:    nil,
+	}
+	task.PreExecute(ctx)
+
+	assert.Equal(t, commonpb.MsgType_HasCollection, task.Type())
+	assert.Equal(t, UniqueID(100), task.ID())
+	assert.Equal(t, Timestamp(100), task.BeginTs())
+	assert.Equal(t, Timestamp(100), task.EndTs())
+	assert.Equal(t, Params.ProxyID, task.GetBase().GetSourceID())
+	// missing collectionID in globalMetaCache
+	err = task.Execute(ctx)
+	assert.Nil(t, err)
+	assert.Equal(t, false, task.result.Value)
+	// createCollection in RootCood and fill GlobalMetaCache
+	rc.CreateCollection(ctx, createColReq)
+	globalMetaCache.GetCollectionID(ctx, collectionName)
+
+	// success to drop collection
+	err = task.Execute(ctx)
+	assert.Nil(t, err)
+	assert.Equal(t, true, task.result.Value)
+
+	// illegal name
+	task.CollectionName = "#0xc0de"
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+
+	rc.updateState(internalpb.StateCode_Abnormal)
+	task.CollectionName = collectionName
+	err = task.PreExecute(ctx)
+	assert.Nil(t, err)
+	err = task.Execute(ctx)
+	assert.NotNil(t, err)
+
+}
+
+func TestDescribeCollectionTask(t *testing.T) {
+	Params.Init()
+	rc := NewRootCoordMock()
+	rc.Start()
+	ctx := context.Background()
+	InitMetaCache(rc)
+	prefix := "TestDescribeCollectionTask"
+	dbName := ""
+	collectionName := prefix + funcutil.GenRandomStr()
+
+	//CreateCollection
+	task := &describeCollectionTask{
+		Condition: NewTaskCondition(ctx),
+		DescribeCollectionRequest: &milvuspb.DescribeCollectionRequest{
+			Base: &commonpb.MsgBase{
+				MsgType:   commonpb.MsgType_DescribeCollection,
+				MsgID:     100,
+				Timestamp: 100,
+			},
+			DbName:         dbName,
+			CollectionName: collectionName,
+		},
+		ctx:       ctx,
+		rootCoord: rc,
+		result:    nil,
+	}
+	task.PreExecute(ctx)
+
+	assert.Equal(t, commonpb.MsgType_DescribeCollection, task.Type())
+	assert.Equal(t, UniqueID(100), task.ID())
+	assert.Equal(t, Timestamp(100), task.BeginTs())
+	assert.Equal(t, Timestamp(100), task.EndTs())
+	assert.Equal(t, Params.ProxyID, task.GetBase().GetSourceID())
+	// missing collectionID in globalMetaCache
+	err := task.Execute(ctx)
+	assert.Nil(t, err)
+
+	// illegal name
+	task.CollectionName = "#0xc0de"
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+
+	rc.Stop()
+	task.CollectionName = collectionName
+	err = task.PreExecute(ctx)
+	assert.Nil(t, err)
+	err = task.Execute(ctx)
+	assert.Nil(t, err)
+	assert.Equal(t, commonpb.ErrorCode_UnexpectedError, task.result.Status.ErrorCode)
+}
+
+func TestCreatePartitionTask(t *testing.T) {
+	Params.Init()
+	rc := NewRootCoordMock()
+	rc.Start()
+	ctx := context.Background()
+	prefix := "TestCreatePartitionTask"
+	dbName := ""
+	collectionName := prefix + funcutil.GenRandomStr()
+	partitionName := prefix + funcutil.GenRandomStr()
+
+	task := &createPartitionTask{
+		Condition: NewTaskCondition(ctx),
+		CreatePartitionRequest: &milvuspb.CreatePartitionRequest{
+			Base: &commonpb.MsgBase{
+				MsgType:   commonpb.MsgType_CreatePartition,
+				MsgID:     100,
+				Timestamp: 100,
+			},
+			DbName:         dbName,
+			CollectionName: collectionName,
+			PartitionName:  partitionName,
+		},
+		ctx:       ctx,
+		rootCoord: rc,
+		result:    nil,
+	}
+	task.PreExecute(ctx)
+
+	assert.Equal(t, commonpb.MsgType_CreatePartition, task.Type())
+	assert.Equal(t, UniqueID(100), task.ID())
+	assert.Equal(t, Timestamp(100), task.BeginTs())
+	assert.Equal(t, Timestamp(100), task.EndTs())
+	assert.Equal(t, Params.ProxyID, task.GetBase().GetSourceID())
+	err := task.Execute(ctx)
+	assert.NotNil(t, err)
+
+	task.CollectionName = "#0xc0de"
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+
+	task.CollectionName = collectionName
+	task.PartitionName = "#0xc0de"
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+}
+
+func TestDropPartitionTask(t *testing.T) {
+	Params.Init()
+	rc := NewRootCoordMock()
+	rc.Start()
+	ctx := context.Background()
+	prefix := "TestDropPartitionTask"
+	dbName := ""
+	collectionName := prefix + funcutil.GenRandomStr()
+	partitionName := prefix + funcutil.GenRandomStr()
+
+	task := &dropPartitionTask{
+		Condition: NewTaskCondition(ctx),
+		DropPartitionRequest: &milvuspb.DropPartitionRequest{
+			Base: &commonpb.MsgBase{
+				MsgType:   commonpb.MsgType_DropPartition,
+				MsgID:     100,
+				Timestamp: 100,
+			},
+			DbName:         dbName,
+			CollectionName: collectionName,
+			PartitionName:  partitionName,
+		},
+		ctx:       ctx,
+		rootCoord: rc,
+		result:    nil,
+	}
+	task.PreExecute(ctx)
+
+	assert.Equal(t, commonpb.MsgType_DropPartition, task.Type())
+	assert.Equal(t, UniqueID(100), task.ID())
+	assert.Equal(t, Timestamp(100), task.BeginTs())
+	assert.Equal(t, Timestamp(100), task.EndTs())
+	assert.Equal(t, Params.ProxyID, task.GetBase().GetSourceID())
+	err := task.Execute(ctx)
+	assert.NotNil(t, err)
+
+	task.CollectionName = "#0xc0de"
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+
+	task.CollectionName = collectionName
+	task.PartitionName = "#0xc0de"
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+}
+
+func TestHasPartitionTask(t *testing.T) {
+	Params.Init()
+	rc := NewRootCoordMock()
+	rc.Start()
+	ctx := context.Background()
+	prefix := "TestHasPartitionTask"
+	dbName := ""
+	collectionName := prefix + funcutil.GenRandomStr()
+	partitionName := prefix + funcutil.GenRandomStr()
+
+	task := &hasPartitionTask{
+		Condition: NewTaskCondition(ctx),
+		HasPartitionRequest: &milvuspb.HasPartitionRequest{
+			Base: &commonpb.MsgBase{
+				MsgType:   commonpb.MsgType_HasPartition,
+				MsgID:     100,
+				Timestamp: 100,
+			},
+			DbName:         dbName,
+			CollectionName: collectionName,
+			PartitionName:  partitionName,
+		},
+		ctx:       ctx,
+		rootCoord: rc,
+		result:    nil,
+	}
+	task.PreExecute(ctx)
+
+	assert.Equal(t, commonpb.MsgType_HasPartition, task.Type())
+	assert.Equal(t, UniqueID(100), task.ID())
+	assert.Equal(t, Timestamp(100), task.BeginTs())
+	assert.Equal(t, Timestamp(100), task.EndTs())
+	assert.Equal(t, Params.ProxyID, task.GetBase().GetSourceID())
+	err := task.Execute(ctx)
+	assert.NotNil(t, err)
+
+	task.CollectionName = "#0xc0de"
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+
+	task.CollectionName = collectionName
+	task.PartitionName = "#0xc0de"
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+}
+
+func TestShowPartitionsTask(t *testing.T) {
+	Params.Init()
+	rc := NewRootCoordMock()
+	rc.Start()
+	ctx := context.Background()
+	prefix := "TestShowPartitionsTask"
+	dbName := ""
+	collectionName := prefix + funcutil.GenRandomStr()
+	partitionName := prefix + funcutil.GenRandomStr()
+
+	task := &showPartitionsTask{
+		Condition: NewTaskCondition(ctx),
+		ShowPartitionsRequest: &milvuspb.ShowPartitionsRequest{
+			Base: &commonpb.MsgBase{
+				MsgType:   commonpb.MsgType_ShowPartitions,
+				MsgID:     100,
+				Timestamp: 100,
+			},
+			DbName:         dbName,
+			CollectionName: collectionName,
+			PartitionNames: []string{partitionName},
+			Type:           milvuspb.ShowType_All,
+		},
+		ctx:       ctx,
+		rootCoord: rc,
+		result:    nil,
+	}
+	task.PreExecute(ctx)
+
+	assert.Equal(t, commonpb.MsgType_ShowPartitions, task.Type())
+	assert.Equal(t, UniqueID(100), task.ID())
+	assert.Equal(t, Timestamp(100), task.BeginTs())
+	assert.Equal(t, Timestamp(100), task.EndTs())
+	assert.Equal(t, Params.ProxyID, task.GetBase().GetSourceID())
+	err := task.Execute(ctx)
+	assert.NotNil(t, err)
+
+	task.CollectionName = "#0xc0de"
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+
+	task.CollectionName = collectionName
+	task.ShowPartitionsRequest.Type = milvuspb.ShowType_InMemory
+	task.PartitionNames = []string{"#0xc0de"}
+	err = task.PreExecute(ctx)
+	assert.NotNil(t, err)
+
+	task.CollectionName = collectionName
+	task.PartitionNames = []string{partitionName}
+	task.ShowPartitionsRequest.Type = milvuspb.ShowType_InMemory
+	err = task.Execute(ctx)
+	assert.NotNil(t, err)
+
+}