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https://issues.apache.org/jira/browse/CASSANDRA-10499?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeff Jirsa resolved CASSANDRA-10499.
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Resolution: Cannot Reproduce
Closing as cant-repro; reopen if you can repro reliably.
> ConcurrentModificationException in Background read repair
> ----------------------------------------------------------
>
> Key: CASSANDRA-10499
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10499
> Project: Cassandra
> Issue Type: Bug
> Reporter: sankalp kohli
> Priority: Minor
> Labels: proposed-cantrepro
>
> We are seeing the below exception in 2.0.14. While looking at the code, it
> looks like it is happening due to ColumnFamily object being modified in SQF.
> trim method.
> Exception in thread Thread[ReadRepairStage:4441,5,main]
> java.util.ConcurrentModificationException
> at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:859)
> at java.util.ArrayList$Itr.next(ArrayList.java:831)
> at
> org.apache.cassandra.db.ColumnFamily.updateDigest(ColumnFamily.java:394)
> at org.apache.cassandra.db.ColumnFamily.digest(ColumnFamily.java:388)
> at
> org.apache.cassandra.service.RowDigestResolver.resolve(RowDigestResolver.java:84)
> at
> org.apache.cassandra.service.RowDigestResolver.resolve(RowDigestResolver.java:28)
> at
> org.apache.cassandra.service.ReadCallback$AsyncRepairRunner.run(ReadCallback.java:173)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
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