CODEWITHSUNDEEP
hadoopcassandracloudera
Wayne Christopher
Wayne Christopher

Reputation: 623

Can I use Hadoop 2.0.0-cdh4.5.0 with Cassandra 2.0.5?

I am trying to use Hadoop 2.0 (specifically the Cloudera 4.5 distribution) with a Cassandra 2.0.4 database. After struggling through a bunch of issues (e.g. making sure Hadoop was running with the 1.7 jdk) I am stuck on this error:

Exception in thread "main" java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected
    at org.apache.cassandra.hadoop.AbstractColumnFamilyInputFormat.getSplits(AbstractColumnFamilyInputFormat.java:120)

Is this expected to work? Should I try the Cloudera 5.0 beta distro? Any other ideas?

Thanks!

Upvotes: 1

Views: 228

Answers (1)

psanford
psanford

Reputation: 5670

Until very recently Cassandra didn't have support for the YARN map reduce interfaces, it only supported the older (0.21/1.x) hadoop interfaces. A patch was just accepted into Cassandra that should fix this (issue CASSANDRA-5201). It will be available when 2.0.6 is released.

Upvotes: 1

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