[QPID-4163] Deadlock between LinkRegistry and TimerTask locks

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.17
• Fix Version/s: 0.18
• Component/s: C++ Broker
• Assignee: Alan Conway
• Reporter: Alan Conway
• Created: 23/Jul/12 15:30
• Updated: 29/Jul/13 18:53
• Resolved: 24/Jul/12 13:35

Description

Very occasionally (about 2% of runs), when running ha_tests.py in a long loop one of the brokers deadlocks with the attached stack trace. The problem is a call to TimerTask::cancel with the LinkRegsitry lock held, while another thread is in TimerTask::fire and waiting for the LinkRegistry lock.