I don't use ehcache. Did you forget to close CacheManager at the end of your job by any chance ?
On Wed, Aug 25, 2010 at 7:59 PM, C J <[email protected]> wrote: > Thanks Ted! > > I did a jstack and it seems there is an issue with ehcache that I am using > in > the mapper task. > > > "net.sf.ehcache.cachemana...@57ac3379" daemon prio=10 > tid=0x0000000059180800 > nid=0x379e in Object.wait() [0x0000000041506000] > java.lang.Thread.State: TIMED_WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaabb0b89a8> (a java.util.TaskQueue) > at java.util.TimerThread.mainLoop(Timer.java:509) > - locked <0x00002aaabb0b89a8> (a java.util.TaskQueue) > at java.util.TimerThread.run(Timer.java:462) > > Locked ownable synchronizers: > - None > . > . > . > > > The hadoop version I am using is 0.20.2. > > Thanks. > > > > ________________________________ > From: Ted Yu <[email protected]> > To: [email protected] > Sent: Wed, August 25, 2010 7:34:35 PM > Subject: Re: Child processes on datanodes/task trackers > > After you obtain pid, you can use jstack to see what the Child process was > doing. > > What hadoop version are you using ? > > On Wed, Aug 25, 2010 at 7:28 PM, C J <[email protected]> wrote: > > > Thanks for your reply. > > > > Some of these child tasks belong to successful jobs. I am wondering why > > they are > > still hanging there for long finished jobs. > > > > > > > > > > > > ________________________________ > > From: Ted Yu <[email protected]> > > To: [email protected] > > Sent: Wed, August 25, 2010 4:17:38 PM > > Subject: Re: Child processes on datanodes/task trackers > > > > Use jps to find out pid of the Child. > > Then use this to find out which job the Child belongs to: > > ps aux | grep <pid> > > > > On Wed, Aug 25, 2010 at 12:20 PM, C J <[email protected]> wrote: > > > > > Hi, > > > > > > I wanted to know why I see running Child processes on my datanodes even > > > though > > > there is no job running at that time. Are these left over from failed > > > attempts? > > > > > > Is there anything I can do to keep these clean? > > > > > > Thanks, > > > Deepika > > > > > > > > > > > > > > > > > > > > > > > >
