Robert Stupp created CASSANDRA-13033:
----------------------------------------
Summary: Thread local pools never cleaned up
Key: CASSANDRA-13033
URL: https://issues.apache.org/jira/browse/CASSANDRA-13033
Project: Cassandra
Issue Type: Bug
Reporter: Robert Stupp
Assignee: Robert Stupp
Fix For: 3.0.x
Netty 4.x uses {{(Fast)ThreadLocal}} instances to provide a pool of (direct)
buffers per thread
({{io.netty.buffer.PooledByteBufAllocator.PoolThreadLocalCache}}. However,
these per-thread pools need to be cleaned up when a thread terminates
({{FastThreadLocal.removeAll()}}) - which is missing.
Although the possibility that such per-thread pools ever _need_ to be cleaned
up, since we rarely terminate threads, it still may actually happen and
manifest in a late and hard to detect out-of-memory situation. One possibility
to raise such a scenario is to regularly stop and restart the native protocol
service.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
