Github user danny0405 commented on a diff in the pull request:
https://github.com/apache/storm/pull/2433#discussion_r153037892
--- Diff: storm-client/src/jvm/org/apache/storm/stats/StatsUtil.java ---
@@ -1589,18 +1570,16 @@ public static ComponentPageInfo aggCompExecsStats(
if (lastReportedTime != null) {
reportedTime = lastReportedTime;
} else {
- reportedTime = 0;
+ reportedTime = lastReportedTime = 0;
--- End diff --
we do not decide if updateHeartbeatCache is null when
reportedTime.equals(lastReportedTime)
---