Merge pull request #2822 from zhangjidi2016/develop

[ISSUE #2538]Optimize log output when message trace saving fails

client/src/main/java/org/apache/rocketmq/client/trace/AsyncTraceDispatcher.java

@@ -370,7 +370,7 @@ public class AsyncTraceDispatcher implements TraceDispatcher {
 
                     @Override
                     public void onException(Throwable e) {
-                        log.info("send trace data ,the traceData is " + data);
+                        log.error("send trace data failed, the traceData is {}", data, e);
                     }
                 };
                 if (traceBrokerSet.isEmpty()) {
@@ -398,7 +398,7 @@ public class AsyncTraceDispatcher implements TraceDispatcher {
                 }
 
             } catch (Exception e) {
-                log.info("send trace data,the traceData is" + data);
+                log.error("send trace data failed, the traceData is {}", data, e);
             }
         }