Tasks to run on a different jvm version than the TaskTracker
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Key: HADOOP-4750
URL: https://issues.apache.org/jira/browse/HADOOP-4750
Project: Hadoop Core
Issue Type: New Feature
Components: mapred
Environment: linux
Reporter: Koji Noguchi
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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