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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 updated CASSANDRA-10499:
-----------------------------------
    Labels:   (was: proposed-cantrepro)

>  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
>
> 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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