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Posted to hdfs-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2023/02/10 01:48:00 UTC

[jira] [Commented] (HDFS-16740) Mini cluster test flakiness

    [ https://issues.apache.org/jira/browse/HDFS-16740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17686826#comment-17686826 ] 

ASF GitHub Bot commented on HDFS-16740:
---------------------------------------

GuoPhilipse commented on PR #4835:
URL: https://github.com/apache/hadoop/pull/4835#issuecomment-1425064462

   indeed, ``restartNameNode`` faces timeout from time to time, for now we have #5377. it will be very nice if we can eliminate this test case errors .
   do we need to change all places related new MiniDFSCluster.Builder to the new constructor ? 




> Mini cluster test flakiness
> ---------------------------
>
>                 Key: HDFS-16740
>                 URL: https://issues.apache.org/jira/browse/HDFS-16740
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs, test
>    Affects Versions: 3.4.0, 3.3.5
>            Reporter: Steve Vaughan
>            Assignee: Steve Vaughan
>            Priority: Major
>              Labels: pull-request-available
>
> Mini clusters used during HDFS unit tests are reporting test failures that do not appear to be directly related to submitted changes.  The failures are the result of either interactions between tests run in parallel, or tests which share common disk space for tests.  In all cases, the tests can be run individually serially without any errors.  Addressing this issue will simplify future submissions by eliminating the confusion introduced by these unrelated test failures.
> We can apply lessons recently from TestRollingUpgrade, which was recently patched to unblock a recent submission.  The fixes involved changing the HDFS configuration to use temporary disk space for each individual tests, and using try-with-resources to ensure that clusters were shutdown cleanly.



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