Brian,
Could you raise a ticket at
https://issues.apache.org/jira/browse/CASSANDRA ?
Thanks
-----------------
Aaron Morton
Freelance Cassandra Developer
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 30/01/2013, at 1:23 AM, Brian Jeltema <brian.jelt...@digitalenvoy.net> wrote:
> In hadoop-0.20.2, org.apache.hadoop.mapreduce.JobContext is a class. Looks
> like in hadoop-0.21+ JobContext has morphed into an interface.
> I'd guess that Hadoop support in Cassandra is based on the older Hadoop.
>
> Brian
>
> On Jan 29, 2013, at 3:42 AM, Tejas Patil wrote:
>
>> I am trying to run a map-reduce job to read data from Cassandra v1.2.0.
>> I started off with the code here:
>> https://svn.apache.org/repos/asf/cassandra/trunk/examples/hadoop_word_count/src/WordCount.java
>>
>> While running it over hadoop-0.22.0, I get this:
>>
>> Exception in thread "main" java.lang.IncompatibleClassChangeError: Found
>> interface org.apache.hadoop.mapreduce.JobContext, but class was expected
>> at
>> org.apache.cassandra.hadoop.ColumnFamilyInputFormat.getSplits(ColumnFamilyInputFormat.java:103)
>> at
>> org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:445)
>> at
>> org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:462)
>> at
>> org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:357)
>> at org.apache.hadoop.mapreduce.Job$2.run(Job.java:1045)
>> at org.apache.hadoop.mapreduce.Job$2.run(Job.java:1042)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at javax.security.auth.Subject.doAs(Subject.java:415)
>> at
>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1153)
>> at org.apache.hadoop.mapreduce.Job.submit(Job.java:1042)
>> at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1062)
>> at MyHadoopApp.run(MyHadoopApp.java:163)
>> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:69)
>> at MyHadoopApp.main(MyHadoopApp.java:82)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:601)
>> at org.apache.hadoop.util.RunJar.main(RunJar.java:192)
>>
>> Does anyone knows about this ?
>>
>> Thanks,
>> Tejas Patil
>
