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https://issues.apache.org/jira/browse/CASSANDRA-12882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16435947#comment-16435947
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Marcus Eriksson commented on CASSANDRA-12882:
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[~nob13] could you attach a full stack trace for the node? jstack -l <pid>
> Deadlock in MemtableAllocator
> -----------------------------
>
> Key: CASSANDRA-12882
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12882
> Project: Cassandra
> Issue Type: Bug
> Environment: Ubuntu 14.40
> Cassandra 3.5
> Reporter: Nimi Wariboko Jr.
> Priority: Major
> Fix For: 3.11.x
>
> Attachments: cassandra.yaml, threaddump.txt
>
>
> I'm seeing an issue where a node will eventually lock up and their thread
> pools - I looked into jstack, and a lot of threads are stuck in the Memtable
> Allocator
> {code}
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:304)
> at
> org.apache.cassandra.utils.concurrent.WaitQueue$AbstractSignal.awaitUninterruptibly(WaitQueue.java:279)
> at
> org.apache.cassandra.utils.memory.MemtableAllocator$SubAllocator.allocate(MemtableAllocator.java:198)
> at
> org.apache.cassandra.utils.memory.SlabAllocator.allocate(SlabAllocator.java:89)
> at
> org.apache.cassandra.utils.memory.ContextAllocator.allocate(ContextAllocator.java:57)
> at
> org.apache.cassandra.utils.memory.ContextAllocator.clone(ContextAllocator.java:47)
> at
> org.apache.cassandra.utils.memory.MemtableBufferAllocator.clone(MemtableBufferAllocator.java:41)
> {code}
> I looked into the code, and its not immediately apparent to me what thread
> might hold the relevant lock.
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