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From Dave Brosius <dbros...@mebigfatguy.com>
Subject Re: Cassandra 1.20 with Cloudera Hadoop (CDH4) Compatibility Issue
Date Sat, 16 Feb 2013 03:36:14 GMT
see https://issues.apache.org/jira/browse/CASSANDRA-5201


On 02/15/2013 10:05 PM, Yang Song wrote:
> Hi,
>
> Does anyone use CDH4's Hadoop with Cassandra to interact? The goal is 
> simply read/write to Cassandra from Hadoop direclty using 
> ColumnFamilyInput(Output)Format, but seems a bit compatibility issue. 
> There are two java exceptions
>
> 1. java.lang.IncompatibleClassChangeError: Found interface 
> org.apache.hadoop.mapreduce.JobContext, but class was expected
> This shows when I run hadoop jar file to read directly from Cassandra. 
> Seems that there is a change on Hadoop that JobContext was changed 
> from class to interface. Has anyone have similar issue?
> Does it mean the Hadoop version in CDH4 is old?
>
> 2. Another error is java.lang.NoSuchMethodError: 
> org.apache.cassandra.hadoop.ConfigHelper.setRpcPort(Lorg/apache/hadoop/conf/Configuration;Ljava/lang/String;)V
> This shows when the jar file contains rpc port for remote Cassandra 
> cluster.
>
> Does anyone have similiar experience? Any comments are welcome. thanks!


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