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https://issues.apache.org/jira/browse/CASSANDRA-5209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13568117#comment-13568117
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Anton Slutsky commented on CASSANDRA-5209:
------------------------------------------
Pasting the patch of the fix that worked for me if anyone cares.
> For small datasets/single hadoop/single cassandra clusters,
> ColumnFamilyRecordReader throws InvalidRequestException(why:Start token sorts
> after end token)
> ----------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-5209
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5209
> Project: Cassandra
> Issue Type: Bug
> Components: Hadoop
> Affects Versions: 1.2.1
> Environment: Ubuntu 12.04
> Reporter: Anton Slutsky
> Fix For: 1.2.2
>
>
> When running the word count example, the following exception is thrown in
> most cases, but not all the time. I have debugged through and it appears
> that the reason is that Partitioner implementations can get into a strange
> state producing splits with ranges with left value being less than minValue.
> This confuses org.apache.cassandra.dht.Range.unwrap() which returns bogus
> ranges that start later than they finish.
> java.lang.RuntimeException: InvalidRequestException(why:Start token sorts
> after end token)
> at
> org.apache.cassandra.hadoop.ColumnFamilyRecordReader$WideRowIterator.maybeInit(ColumnFamilyRecordReader.java:475)
> at
> org.apache.cassandra.hadoop.ColumnFamilyRecordReader$WideRowIterator.computeNext(ColumnFamilyRecordReader.java:481)
> at
> org.apache.cassandra.hadoop.ColumnFamilyRecordReader$WideRowIterator.computeNext(ColumnFamilyRecordReader.java:428)
> at
> com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
> at
> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
> at
> org.apache.cassandra.hadoop.ColumnFamilyRecordReader.nextKeyValue(ColumnFamilyRecordReader.java:199)
> at
> org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:532)
> at
> org.apache.hadoop.mapreduce.MapContext.nextKeyValue(MapContext.java:67)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:143)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212)
> Caused by: InvalidRequestException(why:Start token sorts after end token)
> at
> org.apache.cassandra.thrift.Cassandra$get_paged_slice_result.read(Cassandra.java:14168)
> at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
> at
> org.apache.cassandra.thrift.Cassandra$Client.recv_get_paged_slice(Cassandra.java:769)
> at
> org.apache.cassandra.thrift.Cassandra$Client.get_paged_slice(Cassandra.java:753)
> at
> org.apache.cassandra.hadoop.ColumnFamilyRecordReader$WideRowIterator.maybeInit(ColumnFamilyRecordReader.java:460)
> ... 11 more
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