Yeah seems like its only working with 0.20.2 release at this point (203-205 
upgraded the version, so that's the issue - compatibility broken). I repacked 
their jars with newer hadoop classes (DFSClient especially) and I think it 
works. I didn't test everything though.

Checking out their svn code and trying to build is turning out to be a 
nightmare (ant seems to have a load of deps, and no easy way of hadoop jar 
replacement?), so I'll pass on fixing their upstream stuff for a while. If 
anyone understands their build system better - do take a crack at it - they're 
completely open source :)

On 21-Dec-2011, at 11:28 PM, Radim Kolar wrote:

> i got following errror in log when using mucommander
> 
> 2011-12-21 18:53:12,565 WARN org.apache.hadoop.ipc.Server: Incorrect header 
> or version mismatch from 88.102.**.**:11072 got version 3 expected version 4
> 
> what hdfs version you have?
> 

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