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From Andy Srine <andy.sr...@gmail.com>
Subject Re: JVM option
Date Fri, 18 Apr 2014 18:12:13 GMT
Thanks for the tip. May be it's a different setting I need. Let me explain
the problem.

I get an heap error on the command line - "Exception in thread "main"
java.lang.OutOfMemoryError: Java heap space". It woks when I set "export
HADOOP_HEAPSIZE=4096" in my env. But how can I set it via the hadoop
command line (hadoop jar ...)? Next choice would be to do it
programmatically in Java using hadoop conf. I can't really change the XML
files across the cluster.


On Thu, Apr 17, 2014 at 6:39 PM, Azuryy Yu <azuryyyu@gmail.com> wrote:

> Do you want add "-Xmx4g" to your MR tasks?  if so, just add it as
> "mapred.child.java.opts" in the mapred-site.xml
> On Fri, Apr 18, 2014 at 9:35 AM, Andy Srine <andy.srine@gmail.com> wrote:
>> Quick question. How would I pass the following JVM option to the Hadoop
>> command line?
>> "-Xmx4G"
>> hadoop jar <jar file> <class_name> <args>
>> Thanks,
>> Andy


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