[MAPREDUCE-217] Tasks to run on a different jvm version than the TaskTracker

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed

Environment

linux

• Assignee: Amar Kamat
• Reporter: Koji Noguchi
• Created: 02/Dec/08 16:42
• Updated: 26/Apr/15 01:39
• Resolved: 26/Apr/15 01:39

Description

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.

// use same jvm as parent
File jvm =   new File(new File(System.getProperty("java.home"), "bin"), "java");

Is it possible to let users provide a java home path
or let them choose from a pre-selected list of paths?