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From aaron morton <aa...@thelastpickle.com>
Subject Re: multi-node cassandra config doubt
Date Wed, 24 Aug 2011 09:10:11 GMT
Did you get this sorted ? 

At a guess I would say there are no nodes listed in the Hadoop JobConf.

Cheers

-----------------
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com

On 23/08/2011, at 9:51 PM, Thamizh wrote:

> Hi All,
> 
> This is regarding multi-node cluster configuration doubt.
> 
> I have configured 3 nodes of cluster using Cassandra-0.8.4 and getting error when I ran
Map/Reduce job which uploads records from HDFS to Cassandra.
> 
> Here are my 3 nodes cluster config file (cassandra.yaml) for Cassandra:
> 
> node01:
>     seeds: "node01,node02,node03"
>     auto_bootstrap: false
>     listen_address: 192.168.0.1
>     rpc_address: 192.168.0.1
> 
> 
> node02:
> 
> seeds: "node01,node02,node03"
> auto_bootstrap: true
> listen_address: 192.168.0.2
> rpc_address: 192.168.0.2
> 
> 
> node03:
> seeds: "node01,node02,node03"
> auto_bootstrap: true
> listen_address: 192.168.0.3
> rpc_address: 192.168.0.3
> 
> When I ran M/R program, I am getting below error
> 11/08/23 04:37:00 INFO mapred.JobClient:  map 100% reduce 11%
> 11/08/23 04:37:06 INFO mapred.JobClient:  map 100% reduce 22%
> 11/08/23 04:37:09 INFO mapred.JobClient:  map 100% reduce 33%
> 11/08/23 04:37:14 INFO mapred.JobClient: Task Id : attempt_201104211044_0719_r_000000_0,
Status : FAILED
> java.lang.NullPointerException
>     at org.apache.cassandra.client.RingCache.getRange(RingCache.java:130)
>     at org.apache.cassandra.hadoop.ColumnFamilyRecordWriter.write(ColumnFamilyRecordWriter.java:125)
>     at org.apache.cassandra.hadoop.ColumnFamilyRecordWriter.write(ColumnFamilyRecordWriter.java:60)
>     at org.apache.hadoop.mapreduce.TaskInputOutputContext.write(TaskInputOutputContext.java:80)
>     at CassTblUploader$TblUploadReducer.reduce(CassTblUploader.java:90)
>     at CassTblUploader$TblUploadReducer.reduce(CassTblUploader.java:1)
>     at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:174)
>     at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:563)
>     at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:408)
>     at org.apache.hadoop.mapred.Child.main(Child.java:170)
> 
> 
> Is anything wrong on my cassandra.yaml file?
> 
> I followed http://wiki.apache.org/cassandra/MultinodeCluster for cluster configuration.
> 
> Regards,
> Thamizhannal


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