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https://issues.apache.org/jira/browse/SOLR-12923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16787304#comment-16787304
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ASF subversion and git services commented on SOLR-12923:
--------------------------------------------------------

Commit 27aeb11a37e258c9dae7c4c71361cb005026a746 in lucene-solr's branch 
refs/heads/branch_8x from Chris M. Hostetter
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=27aeb11 ]

SOLR-12923: harden TestSimLargeCluster

- added logging
- ensure start/finish trigger action counters are incremented before latches 
are released
- replace arbitrary sleep calls with a trigger listener countdown latch
- increase all await() times: This means that 'real' failures (which should be 
rare and hopefully
  reproducible) will be 'slow', but the trade off will be less hard to 
reproduce 'false failures'
  due to thread contention on slow or heavily loaded (ie: jenkins) machines

(cherry picked from commit 20de3d2ee0d234d04bbcf7c2cddc18ff67a09f8b)


> The new AutoScaling tests are way to flaky and need special attention.
> ----------------------------------------------------------------------
>
>                 Key: SOLR-12923
>                 URL: https://issues.apache.org/jira/browse/SOLR-12923
>             Project: Solr
>          Issue Type: Sub-task
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: Tests
>            Reporter: Mark Miller
>            Priority: Major
>
> I've already done some work here (not posted yet). We need to address this, 
> these tests are too new to fail so often and easily.
> I want to add beasting to precommit (LUCENE-8545) to help prevent tests that 
> fail so easily from being committed.



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