Pankaj Kumar created CASSANDRA-15916:
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Summary: LEAK Detected in Cassandra
Key: CASSANDRA-15916
URL: https://issues.apache.org/jira/browse/CASSANDRA-15916
Project: Cassandra
Issue Type: Bug
Reporter: Pankaj Kumar
Hi
We are using cassandra docker environment. So 1 out of 3 cassandra, cassandra
docker is restarting continuously. This issue is happening in production setup.
Then checked system logs and debug logs and found these traceback occur
multiple times
ERROR [Reference-Reaper] 2020-06-29 14:40:20,800 Ref.java:229 - LEAK DETECTED:
a reference (org.apache.cassandra.utils.concurrent.Ref$State@53581121) to class
org.apache.cassandra.io.util.MmappedRegions$Tidier@194489638:/var/lib/cassandra/data/system_schema/indexes-0feb57ac311f382fba6d9024d305702f/md-626-big-Index.db
was not released before the reference was garbage collectedDEBUG
[SSTableBatchOpen:8] 2020-06-29 14:40:23,698 SSTableReader.java:515 - Opening
/var/lib/cassandra/data/system_schema/indexes-0feb57ac311f382fba6d9024d305702f/md-240-big
(0.050KiB)ERROR [SSTableBatchOpen:5] 2020-06-29 14:40:20,801
DebuggableThreadPoolExecutor.java:239 - Error in ThreadPoolExecutor
java.lang.NullPointerException: null
at
org.apache.cassandra.io.sstable.format.SSTableReader.getFilename(SSTableReader.java:697)
~[apache-cassandra-3.11.5.jar:3.11.5]
at
org.apache.cassandra.io.sstable.format.SSTableReader.open(SSTableReader.java:543)
~[apache-cassandra-3.11.5.jar:3.11.5]
at
org.apache.cassandra.io.sstable.format.SSTableReader.open(SSTableReader.java:385)
~[apache-cassandra-3.11.5.jar:3.11.5]
at
org.apache.cassandra.io.sstable.format.SSTableReader$3.run(SSTableReader.java:570)
~[apache-cassandra-3.11.5.jar:3.11.5]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
~[na:1.8.0_232]
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
~[na:1.8.0_232]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
~[na:1.8.0_232]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[na:1.8.0_232]
at
org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:84)
[apache-cassandra-3.11.5.jar:3.11.5]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_232]
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