Hi, I wonder if someone could give some pointers with a problem I'm having?
I have a 7 machine cluster setup for testing and we have been pouring data into it for a week without issue, have learnt several thing along the way and solved all the problems up to now by searching online, but now I'm stuck. One of the data nodes decided to have a load of 70+ this morning, stopping datanode and tasktracker brought it back to normal, but every time I start the datanode again the load shoots through the roof, and all I get in the logs is : STARTUP_MSG: Starting DataNode STARTUP_MSG: host = pl464/10.20.16.64 STARTUP_MSG: args = [] STARTUP_MSG: version = 0.20.2-cdh3u3 STARTUP_MSG: build = file:///data/1/tmp/nightly_2012-03-20_13-13-48_3/hadoop-0.20-0.20.2+923.197-1~squeeze -************************************************************/ 2012-05-09 16:12:05,925 INFO org.apache.hadoop.security.UserGroupInformation: JAAS Configuration already set up for Hadoop, not re-installing. 2012-05-09 16:12:06,139 INFO org.apache.hadoop.security.UserGroupInformation: JAAS Configuration already set up for Hadoop, not re-installing. Nothing else. The load seems to max out only 1 of the CPUs, but the machine becomes *very* unresponsive Anybody got any pointers of things I can try? Thanks Darrell.
