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https://issues.apache.org/jira/browse/CASSANDRA-6285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13994075#comment-13994075
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Pavel Yaskevich commented on CASSANDRA-6285:
--------------------------------------------

So I can do two things, a). set alwaysReuse to true by default and release 
0.3.5 today b). you can just switch to alwaysReallocate(true) in the 
configuration for 2.0.8, either works for me.

> 2.0 HSHA server introduces corrupt data
> ---------------------------------------
>
>                 Key: CASSANDRA-6285
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6285
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: 4 nodes, shortly updated from 1.2.11 to 2.0.2
>            Reporter: David Sauer
>            Assignee: Pavel Yaskevich
>            Priority: Critical
>             Fix For: 2.0.8
>
>         Attachments: 6285_testnotes1.txt, 
> CASSANDRA-6285-disruptor-heap.patch, cassandra-attack-src.zip, 
> compaction_test.py, disruptor-high-cpu.patch, 
> disruptor-memory-corruption.patch, enable_reallocate_buffers.txt
>
>
> After altering everything to LCS the table OpsCenter.rollups60 amd one other 
> none OpsCenter-Table got stuck with everything hanging around in L0.
> The compaction started and ran until the logs showed this:
> ERROR [CompactionExecutor:111] 2013-11-01 19:14:53,865 CassandraDaemon.java 
> (line 187) Exception in thread Thread[CompactionExecutor:111,1,RMI Runtime]
> java.lang.RuntimeException: Last written key 
> DecoratedKey(1326283851463420237, 
> 37382e34362e3132382e3139382d6a7576616c69735f6e6f72785f696e6465785f323031335f31305f30382d63616368655f646f63756d656e74736c6f6f6b75702d676574426c6f6f6d46696c746572537061636555736564)
>  >= current key DecoratedKey(954210699457429663, 
> 37382e34362e3132382e3139382d6a7576616c69735f6e6f72785f696e6465785f323031335f31305f30382d63616368655f646f63756d656e74736c6f6f6b75702d676574546f74616c4469736b5370616365557365640b0f)
>  writing into 
> /var/lib/cassandra/data/OpsCenter/rollups60/OpsCenter-rollups60-tmp-jb-58656-Data.db
>       at 
> org.apache.cassandra.io.sstable.SSTableWriter.beforeAppend(SSTableWriter.java:141)
>       at 
> org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:164)
>       at 
> org.apache.cassandra.db.compaction.CompactionTask.runWith(CompactionTask.java:160)
>       at 
> org.apache.cassandra.io.util.DiskAwareRunnable.runMayThrow(DiskAwareRunnable.java:48)
>       at 
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
>       at 
> org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:60)
>       at 
> org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:59)
>       at 
> org.apache.cassandra.db.compaction.CompactionManager$6.runMayThrow(CompactionManager.java:296)
>       at 
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
>       at 
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
>       at java.util.concurrent.FutureTask.run(FutureTask.java:262)
>       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:724)
> Moving back to STC worked to keep the compactions running.
> Especialy my own Table i would like to move to LCS.
> After a major compaction with STC the move to LCS fails with the same 
> Exception.



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