return an error when max retry is reached in executeMethod()

api.go

@@ -20,6 +20,7 @@ import (
 	"bytes"
 	"encoding/base64"
 	"encoding/hex"
+	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -448,6 +449,8 @@ func (c Client) executeMethod(method string, metadata requestMetadata) (res *htt
 	// Indicate to our routine to exit cleanly upon return.
 	defer close(doneCh)
 
+	var retryCount int
+
 	// Blank indentifier is kept here on purpose since 'range' without
 	// blank identifiers is only supported since go1.4
 	// https://golang.org/doc/go1.4#forrange.
@@ -476,6 +479,7 @@ func (c Client) executeMethod(method string, metadata requestMetadata) (res *htt
 		}
 
 		// Initiate the request.
+		retryCount++
 		res, err = c.do(req)
 		if err != nil {
 			// For supported network errors verify.
@@ -528,6 +532,11 @@ func (c Client) executeMethod(method string, metadata requestMetadata) (res *htt
 		// For all other cases break out of the retry loop.
 		break
 	}
+
+	if retryCount >= MaxRetry {
+		err = errors.New("Max retry reached")
+	}
+
 	return res, err
 }