Nimi Wariboko Jr. created CASSANDRA-12882: ---------------------------------------------
Summary: 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. Fix For: 3.5 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)