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https://issues.apache.org/jira/browse/CASSANDRA-14355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16426179#comment-16426179
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Eric Evans commented on CASSANDRA-14355:
----------------------------------------

Also, I can make a heap available, but be warned, they are 12GB in size.

> Memory leak
> -----------
>
>                 Key: CASSANDRA-14355
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14355
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: Debian Jessie, OpenJDK 1.8.0_151
>            Reporter: Eric Evans
>            Priority: Major
>             Fix For: 3.11.3
>
>         Attachments: 01_Screenshot from 2018-04-04 14-24-00.png, 
> 02_Screenshot from 2018-04-04 14-28-33.png, 03_Screenshot from 2018-04-04 
> 14-24-50.png
>
>
> We're seeing regular, frequent {{OutOfMemoryError}} exceptions.  Similar to 
> CASSANDRA-13754, an analysis of the heap dumps shows the heap consumed by the 
> {{threadLocals}} member of the instances of 
> {{io.netty.util.concurrent.FastThreadLocalThread}}.



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