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Robert Stupp commented on CASSANDRA-13754: ------------------------------------------ Yea, that {{SEPWorker}} plus a couple more places (see [here|https://github.com/apache/cassandra/compare/cassandra-3.11...snazy:13754-ftl-leak-3.11?expand=1] and [here|https://github.com/apache/cassandra/compare/trunk...snazy:13754-ftl-leak-trunk?expand=1]). It's actually difficult to tell whether there was really something broken in all these places in the patch, but those changes don't (should not) harm. But if someone introduces a {{FastThreadLocal}} there in the future, it should have no negative impact. Our CI's currently checking the patches. [~markusdlugi], do you have any chance to verify the patches? > FastThreadLocal leaks memory > ---------------------------- > > Key: CASSANDRA-13754 > URL: https://issues.apache.org/jira/browse/CASSANDRA-13754 > Project: Cassandra > Issue Type: Bug > Components: Core > Environment: Cassandra 3.11.0, Netty 4.0.44.Final, OpenJDK 8u141-b15 > Reporter: Eric Evans > Assignee: Robert Stupp > Fix For: 3.11.1 > > > After a chronic bout of {{OutOfMemoryError}} in our development environment, > a heap analysis is showing that more than 10G of our 12G heaps are consumed > by the {{threadLocals}} members (instances of {{java.lang.ThreadLocalMap}}) > of various {{io.netty.util.concurrent.FastThreadLocalThread}} instances. > Reverting > [cecbe17|https://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=commit;h=cecbe17e3eafc052acc13950494f7dddf026aa54] > fixes the issue. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org