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From "Eric Evans (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-13754) FastThreadLocal leaks memory
Date Thu, 10 Aug 2017 16:16:00 GMT
Eric Evans created CASSANDRA-13754:
--------------------------------------

             Summary: FastThreadLocal leaks memory
                 Key: CASSANDRA-13754
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13754
             Project: Cassandra
          Issue Type: Bug
          Components: Core
         Environment: OpenJDK 8u141-b15
            Reporter: Eric Evans
             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.



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