[ 
https://issues.apache.org/jira/browse/CASSANDRA-16133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17197513#comment-17197513
 ] 

Marcus Eriksson commented on CASSANDRA-16133:
---------------------------------------------

Could you find a stacktrace for {{ERROR [CompactionExecutor:272] 2020-09-17 
08:18:20,615 CassandraDaemon.java:235 - Exception in thread 
Thread[CompactionExecutor:272,1,main]
java.lang.NullPointerException: null}} ?

> Recurring exceptions
> --------------------
>
>                 Key: CASSANDRA-16133
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16133
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Oskar Liljeblad
>            Priority: Normal
>
> This happens with 3.11.7.
> The following exceptions are logged every minute or so:
> ERROR [CompactionExecutor:271] 2020-09-17 08:18:58,586 
> CassandraDaemon.java:235 - Exception in thread 
> Thread[CompactionExecutor:271,1,main]
> java.lang.IllegalArgumentException: Self-suppression not permitted
>  at java.lang.Throwable.addSuppressed(Throwable.java:1072) ~[na:1.8.0_262]
>  at org.apache.cassandra.utils.Throwables.merge(Throwables.java:44) 
> ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.db.lifecycle.Helpers.prepareForObsoletion(Helpers.java:140)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.db.lifecycle.LifecycleTransaction.doPrepare(LifecycleTransaction.java:206)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:168)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.io.sstable.SSTableRewriter.doPrepare(SSTableRewriter.java:393)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:168)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.db.compaction.writers.CompactionAwareWriter.doPrepare(CompactionAwareWriter.java:113)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:168)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.finish(Transactional.java:179)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.db.compaction.writers.CompactionAwareWriter.finish(CompactionAwareWriter.java:123)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.db.compaction.CompactionTask.runMayThrow(CompactionTask.java:223)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) 
> ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:85)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:61)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at 
> org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:272)
>  ~[apache-cassandra-3.11.7.jar:3.11.7]
>  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 
> ~[na:1.8.0_262]
>  at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_262]
>  at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>  ~[na:1.8.0_262]
>  at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>  [na:1.8.0_262]
>  at 
> org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:84)
>  [apache-cassandra-3.11.7.jar:3.11.7]
>  at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_262]
> Caused by: java.lang.NullPointerException: null
> and
> ERROR [CompactionExecutor:272] 2020-09-17 08:18:20,615 
> CassandraDaemon.java:235 - Exception in thread 
> Thread[CompactionExecutor:272,1,main]
> java.lang.NullPointerException: null
>  
> Currently trying a full repair to see if it fixes the issue.
> Oskar Liljeblad
>  



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