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From "Brandon Williams (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5201) Cassandra/Hadoop does not support current Hadoop releases
Date Tue, 05 Mar 2013 03:45:13 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13593034#comment-13593034
] 

Brandon Williams commented on CASSANDRA-5201:
---------------------------------------------

That's not a bad idea, but I'm not sure how it'd work entirely, care to formulate a patch?
:)
                
> Cassandra/Hadoop does not support current Hadoop releases
> ---------------------------------------------------------
>
>                 Key: CASSANDRA-5201
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5201
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Hadoop
>    Affects Versions: 1.2.0
>            Reporter: Brian Jeltema
>
> Using Hadoop 0.22.0 with Cassandra results in the stack trace below.
> It appears that version 0.21+ changed org.apache.hadoop.mapreduce.JobContext
> from a class to an interface.
> 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)

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