Establish a grpc connection When init queryNode client (#12236)

Signed-off-by: xige-16 <xi.ge@zilliz.com>

internal/distributed/querynode/client/client.go

@@ -110,7 +110,8 @@ func NewClient(ctx context.Context, addr string) (*Client, error) {
 // Init initializes QueryNode's grpc client.
 func (c *Client) Init() error {
 	Params.Init()
-	return nil
+	_, err := c.getGrpcClient()
+	return err
 }
 
 func (c *Client) connect(retryOptions ...retry.Option) error {

internal/distributed/querynode/client/client_test.go

@@ -97,8 +97,7 @@ func Test_NewClient(t *testing.T) {
 	assert.Nil(t, err)
 	assert.NotNil(t, client)
 
-	err = client.Init()
-	assert.Nil(t, err)
+	Params.Init()
 
 	err = client.Start()
 	assert.Nil(t, err)