Add connect err log (#6186)

Signed-off-by: godchen <qingxiang.chen@zilliz.com>

internal/distributed/datacoord/client/client.go

@@ -13,6 +13,7 @@ package grpcdatacoordclient
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"time"
 
@@ -124,7 +125,7 @@ func (c *Client) recall(caller func() (interface{}, error)) (interface{}, error)
 	}
 	err = c.connect()
 	if err != nil {
-		return ret, err
+		return ret, errors.New("Connect to datacoord failed with error:\n" + err.Error())
 	}
 	ret, err = caller()
 	if err == nil {

internal/distributed/datanode/client/client.go

@@ -13,6 +13,7 @@ package grpcdatanodeclient
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"time"
 
@@ -104,7 +105,7 @@ func (c *Client) recall(caller func() (interface{}, error)) (interface{}, error)
 	}
 	err = c.connect()
 	if err != nil {
-		return ret, err
+		return ret, errors.New("Connect to datanode failed with error:\n" + err.Error())
 	}
 	ret, err = caller()
 	if err == nil {

internal/distributed/indexcoord/client/client.go

@@ -13,6 +13,7 @@ package grpcindexcoordclient
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"time"
 
@@ -127,7 +128,7 @@ func (c *Client) recall(caller func() (interface{}, error)) (interface{}, error)
 	}
 	err = c.connect()
 	if err != nil {
-		return ret, err
+		return ret, errors.New("Connect to indexcoord failed with error:\n" + err.Error())
 	}
 	ret, err = caller()
 	if err == nil {

internal/distributed/indexnode/client/client.go

@@ -13,6 +13,7 @@ package grpcindexnodeclient
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"time"
 
@@ -99,7 +100,7 @@ func (c *Client) recall(caller func() (interface{}, error)) (interface{}, error)
 	}
 	err = c.connect()
 	if err != nil {
-		return ret, err
+		return ret, errors.New("Connect to indexnode failed with error:\n" + err.Error())
 	}
 	ret, err = caller()
 	if err == nil {

internal/distributed/proxy/client/client.go

@@ -13,6 +13,7 @@ package grpcproxyclient
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"time"
 
@@ -98,7 +99,7 @@ func (c *Client) recall(caller func() (interface{}, error)) (interface{}, error)
 	}
 	err = c.connect()
 	if err != nil {
-		return ret, err
+		return ret, errors.New("Connect to proxy failed with error:\n" + err.Error())
 	}
 	ret, err = caller()
 	if err == nil {

internal/distributed/querycoord/client/client.go

@@ -13,6 +13,7 @@ package grpcquerycoordclient
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"time"
 
@@ -126,7 +127,7 @@ func (c *Client) recall(caller func() (interface{}, error)) (interface{}, error)
 	}
 	err = c.connect()
 	if err != nil {
-		return ret, err
+		return ret, errors.New("Connect to querycoord failed with error:\n" + err.Error())
 	}
 	ret, err = caller()
 	if err == nil {

internal/distributed/querynode/client/client.go

@@ -13,6 +13,7 @@ package grpcquerynodeclient
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"time"
 
@@ -99,7 +100,7 @@ func (c *Client) recall(caller func() (interface{}, error)) (interface{}, error)
 	}
 	err = c.connect()
 	if err != nil {
-		return ret, err
+		return ret, errors.New("Connect to querynode failed with error:\n" + err.Error())
 	}
 	ret, err = caller()
 	if err == nil {

internal/distributed/rootcoord/client/client.go

@@ -13,6 +13,7 @@ package grpcrootcoordclient
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"time"
 
@@ -147,7 +148,7 @@ func (c *GrpcClient) recall(caller func() (interface{}, error)) (interface{}, er
 	}
 	err = c.connect()
 	if err != nil {
-		return ret, err
+		return ret, errors.New("Connect to rootcoord failed with error:\n" + err.Error())
 	}
 	ret, err = caller()
 	if err == nil {