[MAPREDUCE-5935] TestMRServerPorts#testTaskTrackerPorts fails with null pointer exception.

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.1.1, 1.2.0, 1.2.1
• Component/s: test
• Assignee: Jinghui Wang
• Reporter: Jinghui Wang
• Created: 20/Jun/14 01:07
• Updated: 23/Sep/15 20:24

Description

The exception is caused by a race condition. The test case calls Jobtracker.offerservice in a seperate thread JTRunner, which initializes the class variable FileSystem fs. In the main thread it tries to close fs in the finally block of code, but at that point jt.fs might still not be initialized, thus causing the NPE.