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Posted to mapreduce-issues@hadoop.apache.org by "Amar Kamat (JIRA)" <ji...@apache.org> on 2009/10/23 12:59:59 UTC
[jira] Updated: (MAPREDUCE-217) Tasks to run on a different jvm
version than the TaskTracker
[ https://issues.apache.org/jira/browse/MAPREDUCE-217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Amar Kamat updated MAPREDUCE-217:
---------------------------------
Attachment: mapreduce-217-v1.0.patch
Attaching a patch that
# allows the child jvm to be configured via mapreduce.task.jvm
# gives preference to child classpath over tasktracker (parent) classpath entries
Result of test-patch
[exec] +1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] +1 tests included. The patch appears to include 3 new or modified tests.
[exec]
[exec] +1 javadoc. The javadoc tool did not generate any warning messages.
[exec]
[exec] +1 javac. The applied patch does not increase the total number of javac compiler warnings.
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs warnings.
[exec]
[exec] +1 release audit. The applied patch does not increase the total number of release audit warnings.
Testing the patch. Mainly I will test some 64bit jvm apps which includes 64 bit libs etc.
The testcase requires the system-property mapreduce.task.jvm to be set to an alternate jvm.
> Tasks to run on a different jvm version than the TaskTracker
> ------------------------------------------------------------
>
> Key: MAPREDUCE-217
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-217
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Environment: linux
> Reporter: Koji Noguchi
> Assignee: Amar Kamat
> Attachments: mapreduce-217-v1.0.patch
>
>
> We use 32-bit jvm for TaskTrackers.
> Sometimes our users want to call 64-bit JNI libraries from their tasks.
> This requires tasks to be running on 64-bit jvm.
> On Solaris, you can simply use -d32/-d64 to choose, but on Linux, it's on a completely different package.
> So far, tasks run on the same jvm version as the TaskTracker.
> {noformat}
> // use same jvm as parent
> File jvm = new File(new File(System.getProperty("java.home"), "bin"), "java");
> {noformat}
> Is it possible to let users provide a java home path
> or let them choose from a pre-selected list of paths?
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