[TEPHRA-164] Multiple instances of tx-state-refresh thread can run concurrently in HBase region server

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.4.0, 0.5.0, 0.6.0, 0.6.1, 0.6.2, 0.6.3
• Component/s: core
• Assignee: Poorna Chandra
• Reporter: Poorna Chandra
• Created: 08/Jan/16 08:48
• Updated: 12/Jan/16 00:48
• Resolved: 12/Jan/16 00:48

Description

Only one instance of tx-state-refresh is supposed to run to refresh transaction state in HBase region server. TransactionStateCacheSupplier has logic to make sure only one instance of tx-state-refresh is started.

However, due to the way locking is implemented in TransactionStateCacheSupplier (synchronization on a non-final object), it is possible for more than one thread to start tx-state-refresh.