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Posted to commits@cassandra.apache.org by "David Capwell (Jira)" <ji...@apache.org> on 2020/11/19 17:14:00 UTC

[jira] [Updated] (CASSANDRA-15214) Internode messaging catches OOMs and does not rethrow

     [ https://issues.apache.org/jira/browse/CASSANDRA-15214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Capwell updated CASSANDRA-15214:
--------------------------------------
    Summary: Internode messaging catches OOMs and does not rethrow  (was: OOMs caught and not rethrown)

> Internode messaging catches OOMs and does not rethrow
> -----------------------------------------------------
>
>                 Key: CASSANDRA-15214
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15214
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Messaging/Client, Messaging/Internode
>            Reporter: Benedict Elliott Smith
>            Assignee: Yifan Cai
>            Priority: Normal
>             Fix For: 4.0, 4.0-rc
>
>         Attachments: oom-experiments.zip
>
>          Time Spent: 1h 40m
>  Remaining Estimate: 0h
>
> Netty (at least, and perhaps elsewhere in Executors) catches all exceptions, so presently there is no way to ensure that an OOM reaches the JVM handler to trigger a crash/heapdump.
> It may be that the simplest most consistent way to do this would be to have a single thread spawned at startup that waits for any exceptions we must propagate to the Runtime.
> We could probably submit a patch upstream to Netty, but for a guaranteed future proof approach, it may be worth paying the cost of a single thread.



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