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From Michael Kjellman <>
Subject Re: Cassandra 1.20 with Cloudera Hadoop (CDH4) Compatibility Issue
Date Sat, 16 Feb 2013 05:06:20 GMT
That bug is kinda wrong though. 1.0.x is current for like a year now and C* works great with
it :)

On Feb 15, 2013, at 7:38 PM, "Dave Brosius" <<>>


On 02/15/2013 10:05 PM, Yang Song wrote:

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
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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