Hi, It's becoming clear th6at there are compatibility issues behind CDH4 and the current Nutch 2.x/Gora/XYZ stack.
There are various Jira tickets open to address this, however we *are most likely* talking about another upgrade of our Hadoop dependencies within Gora. This is not something which should be taken lightly either as backward compatibility (has been and) is an issue here also. Having said this we would very much welcome any contribution to keep Gora bang up-to-date with the likes of CDH4 if possible. Lewis On Thu, Oct 4, 2012 at 6:39 AM, Ashwanth Kumar <[email protected]> wrote: > Seems like you are using the Gora built against Apache Hadoop distribution, > on CDH4. Try compiling them against CDH4 or try using CDH3 > > Since the Class on 1.x was converted to interface on 2.x of Hadoop and CDH4 > has back ported them. > > > On Thu, Oct 4, 2012 at 1:04 AM, Bai Shen <[email protected]> wrote: >> >> I'm using Nutch 2 on CDH4. Nutch uses Gora to talk to HBase. I'm getting >> the following error. Any suggestions on how to fix this? >> >> Thanks. >> >> 12/10/03 15:33:59 WARN mapred.LocalJobRunner: job_local_0001 >> java.lang.IncompatibleClassChangeError: Found interface >> org.apache.hadoop.mapreduce.TaskAttemptContext, but class was expected >> at >> org.apache.gora.mapreduce.GoraOutputFormat.getRecordWriter(GoraOutputFormat.java:83) >> at >> org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.<init>(MapTask.java:523) >> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:626) >> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:325) >> at >> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:263) >> > > > > -- > -- Ashwanth Kumar > -- Lewis
