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https://issues.apache.org/jira/browse/SOLR-13118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16737325#comment-16737325
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ASF subversion and git services commented on SOLR-13118:
--------------------------------------------------------
Commit 5a60c3e0db26ec3dba119d6a6a44facf2089c77d in lucene-solr's branch
refs/heads/branch_8x from Chris M. Hostetter
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=5a60c3e ]
SOLR-13118: Fix various nodeAdded/nodeLost trigger (integration) tests related
to restoriung state
This includes some cleanup and refactoring of unrelated test methods in the
same classes to use new helper methods
(cherry picked from commit 5a513fab8345cd0397435e7ce830268cd3763651)
> Redesign integration tests for nodeAdded/nodeLost trigger state restoration
> ---------------------------------------------------------------------------
>
> Key: SOLR-13118
> URL: https://issues.apache.org/jira/browse/SOLR-13118
> Project: Solr
> Issue Type: Sub-task
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Hoss Man
> Assignee: Hoss Man
> Priority: Major
> Attachments: SOLR-13118.patch
>
>
> The (integration) tests related to autoscaling nodeAdd/nodeLost trigger's and
> restoring their state are problematic for a lot of reasons.
> Beyond some silly implementation mistakes, a fundemental timing/concurrency
> issue is that (as designed) the tests have no way to ensure that "after"
> creating a nodeAdded/nodeLost situation, they can wait for the (first
> instance of) the trigger to run() and detect the situation (recording it in
> the trigger's internal state) so that the test can subsequently "update" the
> trigger, forcing a new instance to restore the old state and then execute the
> trigger actions. This can result i na lot of flaky-ness if the triggers
> don't run when "expected"
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