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From "Erick Erickson (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-12733) SolrMetricReporter failure
Date Tue, 04 Sep 2018 16:44:01 GMT
Erick Erickson created SOLR-12733:
-------------------------------------

             Summary: SolrMetricReporter failure
                 Key: SOLR-12733
                 URL: https://issues.apache.org/jira/browse/SOLR-12733
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
          Components: logging
            Reporter: Erick Erickson
            Assignee: Erick Erickson


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(LockSupport.java:215)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
        at com.lmax.disruptor.TimeoutBlockingWaitStrategy.waitFor(TimeoutBlockingWaitStrategy.java:38)
        at com.lmax.disruptor.ProcessingSequenceBarrier.waitFor(ProcessingSequenceBarrier.java:56)
        at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
        at java.lang.Thread.run(Thread.java:748)
{code}




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