err, "ps aux", not "ps". Alex
On Fri, Jul 30, 2010 at 3:19 PM, Alex Loddengaard <a...@cloudera.com> wrote: > What does "ps" show you? How much memory is being used by the jobtracker, > and how large is its heap (loop for HADOOP_HEAPSIZE in hadoop-env.sh)? Also > consider turning on GC logging, which will find its way to the jobtracker > .out log in /var/log/hadoop: > > <http://java.sun.com/developer/technicalArticles/Programming/GCPortal/> > > Alex > > > On Fri, Jul 30, 2010 at 3:10 PM, jiang licht <licht_ji...@yahoo.com>wrote: > >> http://server:50030/jobtracker.jsp generates the following error message: >> >> HTTP ERROR: 500 >> >> GC overhead limit exceeded >> >> RequestURI=/jobtracker.jsp >> Caused by: >> >> java.lang.OutOfMemoryError: GC overhead limit exceeded >> >> Powered by Jetty:// >> >> The jobtracker is running below the limit. But "hadoop job -status" seems >> to halt and does not response ... >> >> The last 2 lines of jobtracker logs: >> >> 2010-07-30 13:53:18,482 DEBUG org.apache.hadoop.mapred.JobTracker: Got >> heartbeat from: >> tracker_host1:localhost.localdomain/127.0.0.1:53914(restarted: false >> initialContact: false acceptNewTasks: true) with >> responseId: -31252 >> 2010-07-30 13:55:32,917 DEBUG org.apache.hadoop.mapred.JobTracker: >> Starting launching task sweep >> >> Any thought about this? >> >> Thanks! >> --Michael >> >> >> > > >
