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https://issues.apache.org/jira/browse/CASSANDRA-5624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13686794#comment-13686794
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Jonathan Ellis commented on CASSANDRA-5624:
-------------------------------------------
bq. i am looking at notifyListener() in CLHM 1.3
It looks to me like CLHM is trying to take advantage of the threads using it,
to spread out the work of eviction notifications. So remove (and get!) will
loop through pendingNotifications and notify listeners, but only evict adds
events to the queue.
> Memory leak in SerializingCache
> -------------------------------
>
> Key: CASSANDRA-5624
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5624
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.1.1
> Reporter: Jonathan Ellis
> Assignee: Ryan McGuire
>
> A customer reported a memory leak when off-heap row cache is enabled.
> I gave them a patch against 1.1.9 to troubleshoot
> (https://github.com/jbellis/cassandra/commits/row-cache-finalizer). This
> confirms that row cache is responsible. Here is a sample of the log:
> {noformat}
> DEBUG [Finalizer] 2013-06-08 06:49:58,656 FreeableMemory.java (line 69)
> Unreachable memory still has nonzero refcount 1
> DEBUG [Finalizer] 2013-06-08 06:49:58,656 FreeableMemory.java (line 71)
> Unreachable memory 140337996747792 has not been freed (will free now)
> DEBUG [Finalizer] 2013-06-08 06:49:58,656 FreeableMemory.java (line 69)
> Unreachable memory still has nonzero refcount 1
> DEBUG [Finalizer] 2013-06-08 06:49:58,656 FreeableMemory.java (line 71)
> Unreachable memory 140337989287984 has not been freed (will free now)
> {noformat}
> That is, memory is not being freed because we never got to zero references.
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