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Posted to commits@cassandra.apache.org by "Oleg Dulin (JIRA)" <ji...@apache.org> on 2013/05/24 15:38:23 UTC
[jira] [Comment Edited] (CASSANDRA-4687) Exception:
DecoratedKey(xxx, yyy) != DecoratedKey(zzz, kkk)
[ https://issues.apache.org/jira/browse/CASSANDRA-4687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13666301#comment-13666301 ]
Oleg Dulin edited comment on CASSANDRA-4687 at 5/24/13 1:37 PM:
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We just experienced this error. I can't reproduce it, but the workload was very heavy read-before-write load where reads are slice queries. We were loading about 6million data items resulting in updates to about a dozen column families, so roughly speaking 30-40million writes, some interspersed with read-before-write.
Using Cassandra 1.1.11
Please do leave it open for the time being.
was (Author: olegdulin):
We just experienced this error. I can't reproduce it, but the workload was very heavy read-before-write load where reads are slice queries. We were loading about 6million data items resulting in updates to about a dozen column families, so roughly speaking 30-40million writes, some interspersed with read-before-write.
> 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
>
>
> 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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