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From Aditya Muralidharan <Aditya.Muralidha...@nisc.coop>
Subject RE: WordCount example problem
Date Wed, 10 Nov 2010 15:28:07 GMT
Also, your Mapper class needs to look like this:
MyMapper extends Mapper<ByteBuffer, SortedMap<ByteBuffer, IColumn>,Text,SumWritable>
... with all the necessary fixes to the map method.

AD

-----Original Message-----
From: Jonathan Ellis [mailto:jbellis@gmail.com] 
Sent: Wednesday, November 10, 2010 8:40 AM
To: user
Subject: Re: WordCount example problem

http://www.mail-archive.com/user@cassandra.apache.org/msg07093.html

On Wed, Nov 10, 2010 at 5:47 AM, Patrik Modesto
<patrik.modesto@gmail.com> wrote:
> Hi,
>
> I'm trying the WordCount example and getting this error:
>
> [12:33]$ ./bin/word_count
> 10/11/10 12:34:35 INFO WordCount: output reducer type: filesystem
> 10/11/10 12:34:36 INFO jvm.JvmMetrics: Initializing JVM Metrics with
> processName=JobTracker, sessionId=
> 10/11/10 12:34:36 INFO WordCount: XXX:text0
> 10/11/10 12:34:36 INFO mapred.JobClient: Running job: job_local_0001
> 10/11/10 12:34:36 INFO mapred.MapTask: io.sort.mb = 100
> 10/11/10 12:34:36 INFO mapred.MapTask: data buffer = 79691776/99614720
> 10/11/10 12:34:36 INFO mapred.MapTask: record buffer = 262144/327680
> 10/11/10 12:34:36 WARN mapred.LocalJobRunner: job_local_0001
> java.lang.ClassCastException: java.nio.HeapByteBuffer cannot be cast to [B
>        at WordCount$TokenizerMapper.map(WordCount.java:73)
>        at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
>        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:621)
>        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
>        at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)
> 10/11/10 12:34:37 INFO mapred.JobClient:  map 0% reduce 0%
> 10/11/10 12:34:37 INFO mapred.JobClient: Job complete: job_local_0001
> 10/11/10 12:34:37 INFO mapred.JobClient: Counters: 0
>
> I'm using cassandra 0.7.0beta3 (from latest trunk) on just one
> machine. Is the example working for anybody?
>
> Thanks,
> P.
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

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