[HBASE-7086] Enhance ResourceChecker to log stack trace for potentially hanging threads

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.94.3, 0.95.0
• Hadoop Flags: Reviewed
• Assignee: Ted Yu
• Reporter: Ted Yu
• Created: 02/Nov/12 17:23
• Updated: 26/Feb/13 08:20
• Resolved: 04/Nov/12 00:30

Description

Currently ResourceChecker logs a line similar to the following if it detects potential thread leak:

2012-11-02 10:18:59,299 INFO  [main] hbase.ResourceChecker(157): after master.cleaner.TestHFileCleaner#testTTLCleaner: 44 threads (was 43), 145 file descriptors (was 145). 0 connections,  -thread leak?-

We should enhance the log to include stack trace of the potentially hanging thread(s)

This work was motivated when I investigated test failure in HBASE-6796