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Hadoop, mail # user - Re: MapReduce job over HBase-0.94.3 fails


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Re: MapReduce job over HBase-0.94.3 fails
Harsh J 2013-02-25, 08:58
Hi Bhushan,

Please email the [EMAIL PROTECTED] lists for any Apache Hadoop
user-related questions (instead of sending it to me directly this
way). You can subscribe by following instructions at
http://hadoop.apache.org/mailing_lists.html. I've added the list in my
reply here.

On Mon, Feb 25, 2013 at 1:09 PM,  <[EMAIL PROTECTED]> wrote:
> I am using Hadoop-1.0.3 and HBase-0.94.3. I am able to run MapReduce job over Hadoop-1.0.3. But I got following error while running MapReduce job over HBase-0.94.3.
> Exception in thread "main" java.lang.NullPointerException
> at org.apache.hadoop.net.DNS.reverseDns(DNS.java:72)
> at org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.reverseDNS(TableInputFormatBase.java:218)
> at org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.getSplits(TableInputFormatBase.java:183)
> at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:962)
> at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:979)
> at org.apache.hadoop.mapred.JobClient.access$600(JobClient.java:174)
> at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:897)
> at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:850)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:416)
> at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
> at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:850)
> at org.apache.hadoop.mapreduce.Job.submit(Job.java:500)
> at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:530)
> at org.apache.hadoop.hbase.mapreduce.CopyTable.main(CopyTable.java:237)
>
>
> Is their any versioning issue for HBase?
>
> How to resolve it?
>
> Thanks in advance.
>

--
Harsh J