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https://issues.apache.org/jira/browse/CASSANDRA-4000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13223392#comment-13223392
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Sylvain Lebresne commented on CASSANDRA-4000:
---------------------------------------------
I've just pushed a dtest to reproduce (and checked the patch does fix). It's
during short reads, so not sure there's an easy way to test that with a unit
test.
> Division by zero on get_slice
> -----------------------------
>
> Key: CASSANDRA-4000
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4000
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.0.8
> Environment: We start getting this exception after upgrading from
> 1.0.1 -> 1.0.8.
> 4 nodes cluster on Cassandra v1.0.8. RF = 3.
> Hector v0.8.0-3.
> Reporter: Sergey B
> Assignee: Sylvain Lebresne
> Fix For: 1.0.9
>
> Attachments: 4000.txt
>
>
> We have a column family with String row keys and Long column keys.
> Our WideEntityService is trying to get the first column in the range from 0
> to Long.MAX. It's a batch operation performed for every row in the CF (rows
> count is approximately tens of thousands and each row contains from 0 to 1000
> columns).
> After processing each row we are removing some of the columns we have
> queried. Also, at the same time we are writing in this CF in another threads
> but somewhat less intensive.
> An error rises approximately for a one of 100 rows.
> Exception itself:
> [05-Mar-2012 18:47:25,247] ERROR [http-8095-1 WideEntityServiceImpl.java:142]
> - get: key1 - {type=RANGE, start=0, end=9223372036854775807, orderDesc=false,
> limit=1}
> me.prettyprint.hector.api.exceptions.HCassandraInternalException: Cassandra
> encountered an internal error processing this request: TApplicationError
> type: 6 message:Internal error processing get_slice
> at
> me.prettyprint.cassandra.service.ExceptionsTranslatorImpl.translate(ExceptionsTranslatorImpl.java:31)
> at
> me.prettyprint.cassandra.service.KeyspaceServiceImpl$7.execute(KeyspaceServiceImpl.java:285)
> at
> me.prettyprint.cassandra.service.KeyspaceServiceImpl$7.execute(KeyspaceServiceImpl.java:268)
> at
> me.prettyprint.cassandra.service.Operation.executeAndSetResult(Operation.java:101)
> at
> me.prettyprint.cassandra.connection.HConnectionManager.operateWithFailover(HConnectionManager.java:233)
> at
> me.prettyprint.cassandra.service.KeyspaceServiceImpl.operateWithFailover(KeyspaceServiceImpl.java:131)
> at
> me.prettyprint.cassandra.service.KeyspaceServiceImpl.getSlice(KeyspaceServiceImpl.java:289)
> at
> me.prettyprint.cassandra.model.thrift.ThriftSliceQuery$1.doInKeyspace(ThriftSliceQuery.java:53)
> at
> me.prettyprint.cassandra.model.thrift.ThriftSliceQuery$1.doInKeyspace(ThriftSliceQuery.java:49)
> at
> me.prettyprint.cassandra.model.KeyspaceOperationCallback.doInKeyspaceAndMeasure(KeyspaceOperationCallback.java:20)
> at
> me.prettyprint.cassandra.model.ExecutingKeyspace.doExecute(ExecutingKeyspace.java:85)
> at
> me.prettyprint.cassandra.model.thrift.ThriftSliceQuery.execute(ThriftSliceQuery.java:48)
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