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https://issues.apache.org/jira/browse/CASSANDRA-21824?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rishabh Saraswat reassigned CASSANDRA-21824:
--------------------------------------------
Assignee: Rishabh Saraswat
> CEP-45: Compaction races with mutation tracking migration
> ---------------------------------------------------------
>
> Key: CASSANDRA-21824
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21824
> Project: Apache Cassandra
> Issue Type: Bug
> Reporter: Blake Eggleston
> Assignee: Rishabh Saraswat
> Priority: Normal
> Time Spent: 10m
> Remaining Estimate: 0h
>
> During migration to tracked replication you’ll sometimes see these exceptions:
> {{
> com.google.common.base.Preconditions.checkState(Preconditions.java:496)
>
> org.apache.cassandra.io.sstable.format.SSTableWriter.finalizeMetadata(SSTableWriter.java:373)
>
> org.apache.cassandra.io.sstable.format.SSTableWriter$TransactionalProxy.doPrepare(SSTableWriter.java:442)
>
> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:168)
>
> org.apache.cassandra.io.sstable.format.SSTableWriter.prepareToCommit(SSTableWriter.java:302)
>
> org.apache.cassandra.io.sstable.SSTableRewriter.doPrepare(SSTableRewriter.java:338)
>
> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:168)
>
> org.apache.cassandra.db.compaction.writers.CompactionAwareWriter.doPrepare(CompactionAwareWriter.java:121)
>
> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:168)
>
> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.finish(Transactional.java:179)
>
> org.apache.cassandra.db.compaction.writers.CompactionAwareWriter.finish(CompactionAwareWriter.java:131)
>
> org.apache.cassandra.db.compaction.IteratorCompactionPipeline.finishWriting(IteratorCompactionPipeline.java:57)
>
> org.apache.cassandra.db.compaction.CompactionTask.finish(CompactionTask.java:410)
>
> org.apache.cassandra.db.compaction.CompactionTask.runMayThrow(CompactionTask.java:320)
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:26)
>
> org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:113)
>
> org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:110)
>
> org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:474)
> org.apache.cassandra.concurrent.FutureTask$3.call(FutureTask.java:141)
> org.apache.cassandra.concurrent.FutureTask.call(FutureTask.java:61)
> org.apache.cassandra.concurrent.FutureTask.run(FutureTask.java:71)
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
>
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> java.lang.Thread.run(Thread.java:1583)}}
> This could be caused by a compaction of sstables within a pending repair
> bucket starting during migration to tracked replication and ending after
> migration completes. Once migration is over it throws an exception if we try
> writing pending repaired sstables. This is temporary and harmless, the
> compaction is rolled back and the sstables are promoted to repaired, but it
> would be best if we didn’t throw exceptions like this during migration.
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