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https://issues.apache.org/jira/browse/HADOOP-5437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley updated HADOOP-5437:
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Attachment: h5437.patch
This patch:
1. Removes the min split size from the sort run that was effectively forcing
6 maps (and therefore not allowing real jvm reuse).
2. Removes the duplicated set up and tear down the hdfs and mapred cluster.
3. Runs the sort in jvm reuse mode.
4. Adds a new test that uses a static in the mapper to detect whether the
jvms are actually reused or not. It tests the reuse flag set to -1 and 1.
> Unit test for jvm -reuse
> ------------------------
>
> Key: HADOOP-5437
> URL: https://issues.apache.org/jira/browse/HADOOP-5437
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.19.0
> Reporter: Amareshwari Sriramadasu
> Assignee: Amareshwari Sriramadasu
> Priority: Blocker
> Fix For: 0.20.0
>
> Attachments: h5437.patch, patch-5437.txt
>
>
> TestMiniMRDFSSort.testMapReduceSortWithJvmReuse actually does not test jvm
> running multiple tasks. In the test, each jvm runs only one task.
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