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https://issues.apache.org/jira/browse/SOLR-17764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17979336#comment-17979336
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Mark Robert Miller commented on SOLR-17764:
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I don't have the code in front of me, so maybe you changed this or was changed,
but from my memory:
• JettySolrRunner.stop() short-circuits the normal Jetty life-cycle so
that unit tests finish quickly
• it explicitly calls coreContainer.shutdown() before it invokes
Server.stop();
• it sets server.setStopTimeout(0) so Jetty never blocks waiting for
in-flight requests.
• Lots of tests may never add the StatisticsHandler?
In which case, tests in general would not be testing graceful shutdown and
would expect to hit a 503 or random issue due to something being closed
depending on races / how peppered that is closed check is in the code.
503 should mean retry: that won't bullet proof that test if its counting on a
request finishing after cluster shutdown or a whole shard is shutdown, but
should be fairly bullet proof for a single instance or all instances in a shard
but one getting shutdown.
> "graceful" jetty shutdown causes ChaosMonkeySafeLeaderWithPullReplicasTest
> failures
> -----------------------------------------------------------------------------------
>
> Key: SOLR-17764
> URL: https://issues.apache.org/jira/browse/SOLR-17764
> Project: Solr
> Issue Type: Bug
> Reporter: Chris M. Hostetter
> Priority: Major
> Attachments:
> E7F93005B9386058.OUTPUT-org.apache.solr.cloud.ChaosMonkeySafeLeaderWithPullReplicasTest.txt
>
>
> Reviewing recent jenkins test failure metrics, I noticed that (Nightly) test
> ChaosMonkeySafeLeaderWithPullReplicasTest started failing ~60% of the time
> right around the time that SOLR-17744 was committed.
> Things i have observed:
> * Seeds from failing runs seem to reliably reproduce the failure
> ** These failures do *NOT* reproduce if i revert to just before SOLR-17744
> * Ad-hoc testing I've done of seeds that do _not_ fail on first attempt seem
> to reliably succeed on all subsequent attempts
> ** Suggesting that the root cause is something deterministic in the
> {{{}random(){}}}-ness of the test, and not something dependent on timing or
> concurrency.
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