[HBASE-2097] Deadlock between HRegion.put and HRegion.close

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.20.3
• Hadoop Flags: Reviewed
• Assignee: Michael Stack
• Reporter: Jean-Daniel Cryans
• Created: 08/Jan/10 06:52
• Updated: 12/Oct/12 06:14
• Resolved: 09/Jan/10 00:27

Description

HBASE-2037 added a bunch of fixes but also a deadlock:

HRegion.put:

splitsAndClosesLock.readLock().lock();
newScannerLock.writeLock().lock();

HRegion.close

newScannerLock.writeLock().lock();
try {
  splitsAndClosesLock.writeLock().lock();

To recreate, start a PerformanceEvaluation on standalone and it happens roughly 75% of the time.