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Posted to hdfs-dev@hadoop.apache.org by "Kihwal Lee (Jira)" <ji...@apache.org> on 2020/02/27 16:01:00 UTC

[jira] [Resolved] (HDFS-15147) LazyPersistTestCase wait logic is error-prone

     [ https://issues.apache.org/jira/browse/HDFS-15147?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kihwal Lee resolved HDFS-15147.
-------------------------------
    Hadoop Flags: Reviewed
      Resolution: Fixed

> LazyPersistTestCase wait logic is error-prone
> ---------------------------------------------
>
>                 Key: HDFS-15147
>                 URL: https://issues.apache.org/jira/browse/HDFS-15147
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Ahmed Hussein
>            Assignee: Ahmed Hussein
>            Priority: Minor
>             Fix For: 3.3.0, 3.1.4, 3.2.2, 2.10.1
>
>         Attachments: HDFS-15147-branch-2.10.001.patch, HDFS-15147-branch-3.2.001.patch, HDFS-15147.001.patch, HDFS-15147.002.patch, HDFS-15147.003.patch
>
>
> {{LazyPersistTestCase}} has some issues hat lead to inconsistent result of the test cases:
> * the wait periods to change of status is too long. It reaches 10 secs in some cases.
> * triggerBlockReport() only triggers FBR of DN with index 0. This is counter intuitive because the JUnit tests restart the DN assuming that the restarted DN will send a FBR. However, this never happens because the DN will get a new index post restart.
> {code:java}
>   protected final void triggerBlockReport()
>       throws IOException, InterruptedException {
>     // Trigger block report to NN
>     DataNodeTestUtils.triggerBlockReport(cluster.getDataNodes().get(0));
>     Thread.sleep(10 * 1000);
>   }
> {code}
> [~inigoiri] suggested that we propagate the findings and fixes from HDFS-13179 and HDFS-15144 into {{LazyPersistTestCase.java}}. This will eventually reduce the runtime and make the test cases more stable.



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