What is this bit of the log trying to tell me, and what sorts of things should I be looking at to make sure it doesn't happen?
I don't think the network has any basic configuration issues - I can telnet from the machine creating this log to the destination - telnet 10.252.222.239 50010 works fine when I ssh in to the box with this error. 2008-05-07 13:20:31,194 INFO org.apache.hadoop.dfs.DFSClient: Exception in createBlockOutputStream java.net.SocketTimeoutException: Read timed out 2008-05-07 13:20:31,194 INFO org.apache.hadoop.dfs.DFSClient: Abandoning block blk_-5476242061384228962 2008-05-07 13:20:31,196 INFO org.apache.hadoop.dfs.DFSClient: Waiting to find target node: 10.252.222.239:50010 I'm seeing a fair number of these. My reduces finally complete, but there are usually a couple at the end that take longer than I think they should, and they frequently have these sorts of errors. I'm running 20 machines on ec2 right now, with hadoop version 0.16.4. -- James Moore | [EMAIL PROTECTED] blog.restphone.com
