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From "Erick Erickson (JIRA)" <>
Subject [jira] [Commented] (SOLR-12733) SolrMetricReporter failure
Date Wed, 05 Sep 2018 15:20:00 GMT


Erick Erickson commented on SOLR-12733:

Oops, forgot the "Test" at the end. Well, _*I*_ knew what I meant ;)

Thanks for digging into this, I got wrapped up yesterday and didn't get back to it. I'd wondered
about the superclass but hadn't gotten to test it yet.

Anyway, I'll fix up both tests and, I hope, check them in today.

Thanks again!

> SolrMetricReporter failure
> --------------------------
>                 Key: SOLR-12733
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: logging
>            Reporter: Erick Erickson
>            Assignee: Erick Erickson
>            Priority: Major
> Since the change to async logger, this test fails 100% of the time for me locally. [~steve_rowe]
confirmed that it fails for him too so it's not something weird in my environment.
> Why there are no reports from Jenkins of this failure is a mystery.
> The _test_ succeeds, but there is a thread leak and the stack trace points to "lmax.disruptor"
which is certainly a part of the async logging.
> And why, if this is something generic, it doesn't fail many many tests is another mystery
so I suspect it's something specific to the test, perhaps having to do with mocking the metric
reporter, but that's a wild shot in the dark.
> My working hypothesis is that "something isn't being closed/shutdown correctly", but
that's...a little vague.
> {code}
> Sep 04, 2018 9:38:00 AM com.carrotsearch.randomizedtesting.ThreadLeakControl checkThreadLeaks
> WARNING: Will linger awaiting termination of 1 leaked thread(s).
> Sep 04, 2018 9:38:20 AM com.carrotsearch.randomizedtesting.ThreadLeakControl checkThreadLeaks
> SEVERE: 1 thread leaked from SUITE scope at org.apache.solr.metrics.SolrMetricReporterTest:

>    1) Thread[id=14, name=Log4j2-TF-1-AsyncLoggerConfig--1, state=TIMED_WAITING, group=TGRP-SolrMetricReporterTest]
>         at sun.misc.Unsafe.park(Native Method)
>         at java.util.concurrent.locks.LockSupport.parkNanos(
>         at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(
>         at com.lmax.disruptor.TimeoutBlockingWaitStrategy.waitFor(
>         at com.lmax.disruptor.ProcessingSequenceBarrier.waitFor(
>         at
>         at
> {code}

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