[MAPREDUCE-2915] LinuxTaskController does not work when JniBasedUnixGroupsNetgroupMapping or JniBasedUnixGroupsMapping is enabled

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.20.205.0
• Fix Version/s: 0.20.205.0
• Component/s: task-controller
• Assignee: Kihwal Lee
• Reporter: Kihwal Lee
• Due: 01/Sep/11
• Created: 31/Aug/11 00:45
• Updated: 25/Oct/11 12:32
• Resolved: 09/Sep/11 20:12

Description

When a job is submitted, LinuxTaskController launches the native task-controller binary for job initialization. The native program does a series of prep work and call execv() to run JobLocalizer. It was observed that JobLocalizer does fails to run when JniBasedUnixGroupsNetgroupMapping or JniBasedUnixGroupsMapping is enabled, resulting in 100% job failures.

JobLocalizer normally does not need the native library (libhadoop) for its functioning, but enabling a JNI user-to-group mapping function cause it to load the library. However, JobLocalizer cannot locate the library since "java.library.path" is not set.

The proposed solution is to pass the java.library.path property through task-controller. LinuxTaskController already does it when launching the task log truncater.