The exception was due to incompatible RPC versions between Apache maven artifacts and CDH4.
I suggest you build the project with same hadoop version as in your cluster. On Mon, Apr 22, 2013 at 7:50 AM, Kevin Burton <rkevinbur...@charter.net>wrote: > I am relatively new to Hadoop and am working through a Manning publication > "Hadoop in Action". One of the first program in the book (page 44) gives me > a Java exception: org.apache.hadoop.ipc.RemoteException: Server IPC version > 7 cannot communicate with client version 3. > > My Hadoop distribution is CDH4. The Java Maven project takes its > dependency from Apache. The exception comes from a line involving the > "Configuration" class. > > Any idea on how to avoid this exception?
