[HADOOP-8894] GenericTestUtils.waitFor should dump thread stacks on timeout

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.3-alpha
• Target Version/s: 2.0.3-alpha
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 06/Oct/12 01:04
• Updated: 03/Sep/14 23:11
• Resolved: 09/Oct/12 00:34

Description

Many tests use this utility to wait for a condition to become true. In the event that it times out, we should dump all the thread stack traces, in case the timeout was due to a deadlock. This should make it easier to debug scenarios like HDFS-4001.