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https://issues.apache.org/jira/browse/SOLR-16848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17737798#comment-17737798
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Paul McArthur commented on SOLR-16848:
--------------------------------------
[~stillalex] I don't think I have the permission required to push to your
branch and update the PR. The change is pretty simple, so feel free to take
whichever bits you think are useful.
Maybe we can throw my name in the commit metadata when it gets squash-merged :)
> Flaky DeleteReplicaTest.raceConditionOnDeleteAndRegisterReplica
> ---------------------------------------------------------------
>
> Key: SOLR-16848
> URL: https://issues.apache.org/jira/browse/SOLR-16848
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Alex Deparvu
> Assignee: Jason Gerlowski
> Priority: Minor
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Some stats first:
> - Past 7 days trend:
> {noformat}
> Class: org.apache.solr.cloud.DeleteReplicaTest
> Method: raceConditionOnDeleteAndRegisterReplica
> Failures: 11.22% (44 / 392)
> {noformat}
> - Test failure is caused by a NullPointerException:
> {noformat}
> ERROR (coreZkRegister-772-thread-1-processing-127.0.0.1:40471_solr)
> [n:127.0.0.1:40471_solr c:raceDeleteReplicaCollection s:shard1 r:core_node4
> x:raceDeleteReplicaCollection_shard1_replica_n2] o.a.s.c.DeleteReplicaTest
> Failed to delete replica
> => java.lang.NullPointerException: Cannot invoke
> "org.apache.solr.core.CoreContainer.getZkController()" because the return
> value of "org.apache.solr.embedded.JettySolrRunner.getCoreContainer()" is null
> {noformat}
> a more complete trace
> {noformat}
> o.a.s.c.DeleteReplicaTest Failed to delete replica
> 2> => java.lang.NullPointerException
> 2> at
> org.apache.solr.cloud.DeleteReplicaTest.lambda$raceConditionOnDeleteAndRegisterReplica$10(DeleteReplicaTest.java:350)
> 2> java.lang.NullPointerException: null
> 2> at
> org.apache.solr.cloud.DeleteReplicaTest.lambda$raceConditionOnDeleteAndRegisterReplica$10(DeleteReplicaTest.java:350)
> 2> at
> org.apache.solr.core.ZkContainer.lambda$registerInZk$1(ZkContainer.java:211)
> [main/:?]
> 2> at
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:289)
> 2> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> [?:?]
> 2> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> [?:?]
> 2> at java.lang.Thread.run(Thread.java:829) [?:?]
> o.a.s.c.u.ExecutorUtil Uncaught exception java.lang.AssertionError: Failed to
> delete replica thrown by thread:
> coreZkRegister-1586-thread-1-processing-127.0.0.1:34497_solr
> 2> => java.lang.Exception: Submitter stack trace
> 2> at
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.execute(ExecutorUtil.java:256)
> java.lang.Exception: Submitter stack trace
> 2> at
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.execute(ExecutorUtil.java:256)
> 2> at org.apache.solr.core.ZkContainer.registerInZk(ZkContainer.java:244)
> ~[main/:?]
> 2> at
> org.apache.solr.core.CoreContainer.lambda$loadInternal$12(CoreContainer.java:1025)
> 2> at
> com.codahale.metrics.InstrumentedExecutorService$InstrumentedCallable.call(InstrumentedExecutorService.java:234)
> 2> at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
> 2> at
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:289)
> 2> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> [?:?]
> 2> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> [?:?]
> 2> at java.lang.Thread.run(Thread.java:829) [?:?]
> Caused by: java.lang.Exception: Submitter stack trace
> 2> at
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.execute(ExecutorUtil.java:256)
> 2> at
> java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140)
> ~[?:?]
> 2> at
> com.codahale.metrics.InstrumentedExecutorService.submit(InstrumentedExecutorService.java:122)
> 2> at
> org.apache.solr.core.CoreContainer.loadInternal(CoreContainer.java:1009)
> ~[main/:?]
> 2> at org.apache.solr.core.CoreContainer.load(CoreContainer.java:753)
> 2> at
> org.apache.solr.servlet.CoreContainerProvider.createCoreContainer(CoreContainerProvider.java:411)
> 2> at
> org.apache.solr.servlet.CoreContainerProvider.init(CoreContainerProvider.java:230)
> 2> at
> org.apache.solr.embedded.JettySolrRunner$1.lifeCycleStarted(JettySolrRunner.java:407)
> {noformat}
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