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https://issues.apache.org/jira/browse/KUDU-1473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15306955#comment-15306955
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Todd Lipcon commented on KUDU-1473:
-----------------------------------
It's also somewhat curious why this is triggered by the java tests
(TestKuduTable) reasonably often but not by any C++ tests. Perhaps we're
lacking some coverage
> ProcessPendingAssignments accesses tablet metadata without a lock
> -----------------------------------------------------------------
>
> Key: KUDU-1473
> URL: https://issues.apache.org/jira/browse/KUDU-1473
> Project: Kudu
> Issue Type: Bug
> Components: master
> Affects Versions: 0.9.0
> Reporter: Todd Lipcon
> Assignee: Adar Dembo
>
> I've seen Java tests being flaky with this crash:
> {code}
> F0530 13:51:16.076247 30686 cow_object.h:82] Check failed: lock_.HasReaders()
> || lock_.HasWriteLock()
> *** Check failure stack trace: ***
> @ 0x7f8c52d0fe64 kudu::CowObject<>::state()
> @ 0x7f8c52d0848b
> kudu::master::AsyncCreateReplica::AsyncCreateReplica()
> @ 0x7f8c52cf7af2
> kudu::master::CatalogManager::SendCreateTabletRequests()
> @ 0x7f8c52cf7375
> kudu::master::CatalogManager::ProcessPendingAssignments()
> @ 0x7f8c52ce4ad7 kudu::master::CatalogManagerBgTasks::Run()
> {code}
> It seems like this code path doesn't acquire the read lock on the tablet, and
> thus fires the assertion
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