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https://issues.apache.org/jira/browse/CASSANDRA-1412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12903519#action_12903519
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Arya Goudarzi commented on CASSANDRA-1412:
------------------------------------------

>This is caused by having a replication factor greater than the number of nodes 
>in your cluster

All my keyspaces have RF=2 except one which has RF=3 and I have 3 nodes.

> Internal error processing batch_mutate
> --------------------------------------
>
>                 Key: CASSANDRA-1412
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1412
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.7 beta 1
>         Environment: CentOS 5.2
> svn co -r 987305, August 19th
>            Reporter: Arya Goudarzi
>            Priority: Minor
>             Fix For: 0.7.0
>
>         Attachments: node1.log, node2.log, node3.log
>
>
> I have a 3 node cluster with existing data on it which where inserted using 
> the version on trunc on August 15th. Today, I was trying to insert a row with 
> a single column and value larger than 8k and I got Internal Error which in 
> the logs is as follows:
> ERROR [pool-1-thread-21] 2010-08-19 17:10:35,122 Cassandra.java (line 2988) 
> Internal error processing batch_mutate
> java.lang.AssertionError
>       at 
> org.apache.cassandra.locator.AbstractReplicationStrategy.getNaturalEndpoints(AbstractReplicationStrategy.java:91)
>       at 
> org.apache.cassandra.service.StorageService.getNaturalEndpoints(StorageService.java:1289)
>       at 
> org.apache.cassandra.service.StorageService.getNaturalEndpoints(StorageService.java:1277)
>       at 
> org.apache.cassandra.service.StorageProxy.mutate(StorageProxy.java:106)
>       at 
> org.apache.cassandra.thrift.CassandraServer.doInsert(CassandraServer.java:468)
>       at 
> org.apache.cassandra.thrift.CassandraServer.batch_mutate(CassandraServer.java:438)
>       at 
> org.apache.cassandra.thrift.Cassandra$Processor$batch_mutate.process(Cassandra.java:2980)
>       at 
> org.apache.cassandra.thrift.Cassandra$Processor.process(Cassandra.java:2499)
>       at 
> org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:167)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
>       at java.lang.Thread.run(Thread.java:636)
> I got the same exception before on the version which I was running in 
> CASSANDRA-1384 and I also mentioned it there, but I think this is a different 
> one and has nothing to do with Migration Stage, so filing a separate issue.
> Please investigate.

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