See https://issues.apache.org/jira/browse/CASSANDRA-5168 - should be fixed in
1.1.10 and 1.2.2.
On Jan 30, 2013, at 9:18 AM, Tejas Patil <tejas.patil...@gmail.com> wrote:
> While reading data from Cassandra in map-reduce, I am getting
> "InvalidRequestException(why:Start token sorts after end token)"
>
> Below is the code snippet that I used and the entire stack trace.
> (I am using Cassandra 1.2.0 and hadoop 0.20.2)
> Can you point out the issue here ?
>
> Code snippet:
> SlicePredicate predicate = new SlicePredicate();
>
> SliceRange sliceRange = new SliceRange();
> sliceRange.start = ByteBuffer.wrap(("1".getBytes()));
> sliceRange.finish = ByteBuffer.wrap(("1000000".getBytes()));
> sliceRange.reversed = false;
> // predicate.slice_range = sliceRange;
>
> List<ByteBuffer> colNames = new ArrayList<ByteBuffer>();
> colNames.add(ByteBuffer.wrap("url".getBytes()));
> colNames.add(ByteBuffer.wrap("Parent".getBytes()));
> predicate.column_names = colNames;
>
> ConfigHelper.setInputSlicePredicate(job.getConfiguration(), predicate);
>
> Full stack trace:
> java.lang.RuntimeException: InvalidRequestException(why:Start token sorts
> after end token)
> at
> org.apache.cassandra.hadoop.ColumnFamilyRecordReader$StaticRowIterator.maybeInit(ColumnFamilyRecordReader.java:384)
> at
> org.apache.cassandra.hadoop.ColumnFamilyRecordReader$StaticRowIterator.computeNext(ColumnFamilyRecordReader.java:390)
> at
> org.apache.cassandra.hadoop.ColumnFamilyRecordReader$StaticRowIterator.computeNext(ColumnFamilyRecordReader.java:313)
> at
> com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
> at
> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
> at
> org.apache.cassandra.hadoop.ColumnFamilyRecordReader.nextKeyValue(ColumnFamilyRecordReader.java:184)
> at
> org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:456)
> 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:
>
