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https://issues.apache.org/jira/browse/HADOOP-4698?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tom White updated HADOOP-4698:
------------------------------
Attachment: hadoop-4698.patch
Here's a stacktrace I get on Mac OS X (running against trunk revision 720464):
{code}
java.lang.OutOfMemoryError: Java heap space
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:488)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:295)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:138)
{code}
Following Matei's suggestion, setting the memory to 512 MB causes the tests
(TestMapRed, TestReduceFetch, TestJobControl) to pass. The attached patch
changes the default for running ant.
> TestMapRed fails with 64bit JDK
> -------------------------------
>
> Key: HADOOP-4698
> URL: https://issues.apache.org/jira/browse/HADOOP-4698
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred, test
> Affects Versions: 0.19.0
> Reporter: Nigel Daley
> Assignee: Nigel Daley
> Fix For: 0.19.1
>
> Attachments: hadoop-4698.patch, HADOOP-4698.patch
>
>
> 2 test cases in TestMapRed fail when run with 64bit JDK. They both run out
> of memory. This is due to the default value of io.sort.mb being used (100mb).
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