diff --git a/httpclimgr.go b/httpclimgr.go
index 94a8292..b33377e 100644
--- a/httpclimgr.go
+++ b/httpclimgr.go
@@ -192,8 +192,14 @@ func (this *httpCliMgr) internalSendRequest(
 			rsp := new(httpCliResponse)
 			rsp.init(data, err)
 			if rsp.GetErr() == nil && jsonRspObj != nil {
-				if json.Unmarshal([]byte(rsp.GetRawData()), jsonRspObj) == nil {
+				parseErr := json.Unmarshal([]byte(rsp.GetRawData()), jsonRspObj)
+				if parseErr == nil {
 					rsp.jsonParseOk = true
+				} else {
+					GetSysLog().Warning("f5.httpclimgr.internalSendRequest json error:%s url:%s params:%s",
+						parseErr,
+						url,
+						q5.EncodeJson(&params))
 				}
 			}
 			if style == GO_STYLE_REQUEST {