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Posted to common-user@hadoop.apache.org by Gianmarco <gi...@gmail.com> on 2010/05/03 17:04:07 UTC

Assertions

Hi all,
is there a way to enable Java assertions inside a map/reduce function?
I tried setting the -enableassertions switch in hadoop-env.sh using the
HADOOP_TASKTRACKER_OPTS variable but it didn't work.
I tried also setting a property in mapred-site.xml

<property>
  <name>mapred.child.java.opts</name>
  <value>-enableassertions</value>
</property>

but I get a "Java heap space" error.

Thanks,
Gianmarco

Re: Assertions

Posted by Mithila Nagendra <mn...@asu.edu>.

Gianmarco,

You might want to increase the heap size. It's a property that can be set:
try setting "mapred.child.java.opts" to  -Xmx1024M.

Mithila

On Mon, May 3, 2010 at 8:04 AM, Gianmarco <gi...@gmail.com> wrote:

> Hi all,
> is there a way to enable Java assertions inside a map/reduce function?
> I tried setting the -enableassertions switch in hadoop-env.sh using the
> HADOOP_TASKTRACKER_OPTS variable but it didn't work.
> I tried also setting a property in mapred-site.xml
>
> <property>
>  <name>mapred.child.java.opts</name>
>  <value>-enableassertions</value>
> </property>
>
> but I get a "Java heap space" error.
>
> Thanks,
> Gianmarco
>