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 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
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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
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
