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https://issues.apache.org/jira/browse/CASSANDRA-14253?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Kirillov updated CASSANDRA-14253:
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Attachment: dump.std
> MutationStage threads deadlock
> ------------------------------
>
> Key: CASSANDRA-14253
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14253
> Project: Cassandra
> Issue Type: Bug
> Components: Local Write-Read Paths
> Environment: Ubuntu 16.04
> Reporter: Sergey Kirillov
> Priority: Major
> Attachments: dump.std, flame.svg, flame_tn.svg
>
>
> Hi.
> I've had a persistent problems with cluster upgraded to 3.11.2. I was
> recreating one of my MVs and suddenly nodes request latencies went crazy.
> During investigation I have found that half of my nodes had stuck
> MutationStage threads. All 64 threads were Active, Pending count was
> continuously increasing while Completed stuck on one value.
> After restart nodes worked a few minutes and then stuck again. Another
> restart, another few minutes of work and stuck.
> In attachment you can find flame graphs for MutationStage threads and for all
> threads. It seems that all MutationStage threads were waiting for some event.
>
> Downgrade to 3.10 solved that problem, after downgrade all nodes are
> operational and not freezing.
>
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