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https://issues.apache.org/jira/browse/HBASE-18089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16030502#comment-16030502
 ] 

Ted Yu commented on HBASE-18089:
--------------------------------

For the 2nd part of testImportanceOfHeartbeats :
{code}
    HeartbeatRPCServices.heartbeatsEnabled = false;
    try {
      testCallable.call();
    } catch (Exception e) {
      return;
{code}
What might have happened where the test failed was that the call() returned 
earlier than an exception could be thrown.

> TestScannerHeartbeatMessages fails in branch-1
> ----------------------------------------------
>
>                 Key: HBASE-18089
>                 URL: https://issues.apache.org/jira/browse/HBASE-18089
>             Project: HBase
>          Issue Type: Test
>            Reporter: Ted Yu
>            Assignee: huaxiang sun
>         Attachments: test-heartbeat-6860.out
>
>
> From 
> https://builds.apache.org/job/PreCommit-HBASE-Build/6860/artifact/patchprocess/patch-unit-hbase-server.txt
>  :
> {code}
> testScannerHeartbeatMessages(org.apache.hadoop.hbase.regionserver.TestScannerHeartbeatMessages)
>   Time elapsed: 2.376 sec  <<< FAILURE!
> java.lang.AssertionError: Heartbeats messages are disabled, an exception 
> should be thrown. If an exception  is not thrown, the test case is not 
> testing the importance of heartbeat messages
>       at org.junit.Assert.fail(Assert.java:88)
>       at 
> org.apache.hadoop.hbase.regionserver.TestScannerHeartbeatMessages.testImportanceOfHeartbeats(TestScannerHeartbeatMessages.java:237)
>       at 
> org.apache.hadoop.hbase.regionserver.TestScannerHeartbeatMessages.testScannerHeartbeatMessages(TestScannerHeartbeatMessages.java:207)
> {code}
> Similar test failure can be observed in 
> https://builds.apache.org/job/PreCommit-HBASE-Build/6852/artifact/patchprocess/patch-unit-hbase-server.txt



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