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https://issues.apache.org/jira/browse/SOLR-16408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17602500#comment-17602500
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Kevin Risden commented on SOLR-16408:
-------------------------------------
It looks like deleteCore is handled by SolrTestCaseJ4 - and
TestInjection.notifyPauseForeverDone(); is only called in that class. So the
executor can't finish when the test calls deleteCore itself.
> TestHdfsUpdateLog.classMethod not shutting down MDCAwareThreadPoolExecutor
> --------------------------------------------------------------------------
>
> Key: SOLR-16408
> URL: https://issues.apache.org/jira/browse/SOLR-16408
> Project: Solr
> Issue Type: Test
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Hadoop Integration, hdfs
> Reporter: Kevin Risden
> Assignee: Kevin Risden
> Priority: Major
>
> This surfaced after SOLR-16187 which should tell us why some builds were just
> timing out in the past. Now we have a stacktrace of where the pool got stuck.
> {code:java}
> Build: https://jenkins.thetaphi.de/job/Solr-main-Linux/7070/
> Java: 64bit/jdk-11.0.15 -XX:+UseCompressedOops -XX:+UseSerialGC
> 1 tests failed.
> FAILED: org.apache.solr.hdfs.update.TestHdfsUpdateLog.classMethod
> Error Message:
> java.lang.RuntimeException: Timeout waiting for pool
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor@12bfe088[Shutting
> down, pool size = 1, active threads = 1, queued tasks = 0, completed tasks =
> 0] to shutdown.
> Stack Trace:
> java.lang.RuntimeException: Timeout waiting for pool
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor@12bfe088[Shutting
> down, pool size = 1, active threads = 1, queued tasks = 0, completed tasks =
> 0] to shutdown.
> at __randomizedtesting.SeedInfo.seed([C45530E56E50859A]:0)
> at
> org.apache.solr.common.util.ExecutorUtil.awaitTermination(ExecutorUtil.java:112)
> at
> org.apache.solr.common.util.ExecutorUtil.awaitTermination(ExecutorUtil.java:99)
> at
> org.apache.solr.common.util.ExecutorUtil.shutdownAndAwaitTermination(ExecutorUtil.java:89)
> at org.apache.solr.core.SolrCores.close(SolrCores.java:149)
> at
> org.apache.solr.core.CoreContainer.shutdown(CoreContainer.java:1188)
> at org.apache.solr.util.TestHarness.close(TestHarness.java:397)
> at org.apache.solr.SolrTestCaseJ4.deleteCore(SolrTestCaseJ4.java:942)
> at
> org.apache.solr.hdfs.update.TestHdfsUpdateLog.afterClass(TestHdfsUpdateLog.java:75)
> {code}
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