[ 
https://issues.apache.org/jira/browse/CASSANDRA-13754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16148858#comment-16148858
 ] 

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

Reply via email to