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From Koji Noguchi <knogu...@yahoo-inc.com>
Subject Re: OutOfMemoryError in the job tracker
Date Thu, 01 Feb 2007 17:03:16 GMT
Hi Thomas,

I think we had the same problem before.  Dhruba pointed out,

http://bugs.sun.com/bugdatabase/view_bug.do;:YfiG?bug_id=4705373

 > Did someone have a solution to avoid this ?
 >
Couple of options.
1) Ask the users to submit smaller jar file.
2) Use JDK 1.6
3) Use 64-bit JVM

Hope it works.

Koji


Thomas Friol wrote:
> Hi,
> 
> I am using the 0.10.1 version of hadoop and after less than 24 hour of
> running, the jobtracker send the following error when it tries to run a
> job :
> 
> 2007-02-01 04:10:09,285 ERROR org.apache.hadoop.mapred.JobTracker: Job
> initialization failed:
> java.lang.OutOfMemoryError
>     at java.util.zip.ZipFile.open(Native Method)
>     at java.util.zip.ZipFile.<init>(ZipFile.java:203)
>     at java.util.jar.JarFile.<init>(JarFile.java:132)
>     at java.util.jar.JarFile.<init>(JarFile.java:70)
>     at sun.misc.URLClassPath$JarLoader.getJarFile(URLClassPath.java:579)
>     at sun.misc.URLClassPath$JarLoader.<init>(URLClassPath.java:546)
>     at sun.misc.URLClassPath$3.run(URLClassPath.java:324)
>     at java.security.AccessController.doPrivileged(Native Method)
>     at sun.misc.URLClassPath.getLoader(URLClassPath.java:313)
>     at sun.misc.URLClassPath.getLoader(URLClassPath.java:290)
>     at sun.misc.URLClassPath.getResource(URLClassPath.java:160)
>     at java.net.URLClassLoader$1.run(URLClassLoader.java:192)
>     at java.security.AccessController.doPrivileged(Native Method)
>     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>     at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
>     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
>     at java.lang.Class.forName0(Native Method)
>     at java.lang.Class.forName(Class.java:242)
>     at
> org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:315)
>     at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:326)
>     at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:339)
>     at org.apache.hadoop.mapred.JobConf.getInputFormat(JobConf.java:263)
>     at
> org.apache.hadoop.mapred.JobInProgress.initTasks(JobInProgress.java:123)
>     at
> org.apache.hadoop.mapred.JobTracker$JobInitThread.run(JobTracker.java:360)
>     at java.lang.Thread.run(Thread.java:595)
> 
> Did soemone notice the same kind of behavior ?
> Did someone have a solution to avoid this ?
> 
> I just found that restarting the jobtracker solves the problem but
> that's it.
> 
> Thanks for any help.
> 


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