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From "Jacek Furmankiewicz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4687) Exception: DecoratedKey(xxx, yyy) != DecoratedKey(zzz, kkk)
Date Fri, 20 Dec 2013 20:24:13 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13854526#comment-13854526
] 

Jacek Furmankiewicz commented on CASSANDRA-4687:
------------------------------------------------

BTW, is there any particular reason why you upgraded snappy? if there are no particularly
important features, maybe it would be worth rolling it back for the 1.2 releases. 

The benefits of that minor change do not seem to be worth losing the ability to run 1.2 on
a stock RHEL5, which is still very common on production systems.

> Exception: DecoratedKey(xxx, yyy) != DecoratedKey(zzz, kkk)
> -----------------------------------------------------------
>
>                 Key: CASSANDRA-4687
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4687
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: CentOS 6.3 64-bit, Oracle JRE 1.6.0.33 64-bit, single node cluster
>            Reporter: Leonid Shalupov
>            Priority: Minor
>         Attachments: 4687-debugging.txt, apache-cassandra-1.2.13-SNAPSHOT.jar, guava-backed-cache.patch
>
>
> Under heavy write load sometimes cassandra fails with assertion error.
> git bisect leads to commit 295aedb278e7a495213241b66bc46d763fd4ce66.
> works fine if global key/row caches disabled in code.
> {quote}
> java.lang.AssertionError: DecoratedKey(xxx, yyy) != DecoratedKey(zzz, kkk) in /var/lib/cassandra/data/...-he-1-Data.db
> 	at org.apache.cassandra.db.columniterator.SSTableSliceIterator.<init>(SSTableSliceIterator.java:60)
> 	at org.apache.cassandra.db.filter.SliceQueryFilter.getSSTableColumnIterator(SliceQueryFilter.java:67)
> 	at org.apache.cassandra.db.filter.QueryFilter.getSSTableColumnIterator(QueryFilter.java:79)
> 	at org.apache.cassandra.db.CollationController.collectAllData(CollationController.java:256)
> 	at org.apache.cassandra.db.CollationController.getTopLevelColumns(CollationController.java:64)
> 	at org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1345)
> 	at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1207)
> 	at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1142)
> 	at org.apache.cassandra.db.Table.getRow(Table.java:378)
> 	at org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadCommand.java:69)
> 	at org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:819)
> 	at org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:1253)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:662)
> {quote}



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