[HADOOP-11604] Prevent ConcurrentModificationException while closing domain sockets during shutdown of DomainSocketWatcher thread.

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.6.1, 2.7.0, 3.0.0-alpha1
• Component/s: net
• Labels: 2.6.1-candidate
• Target Version/s: 2.7.0
• Hadoop Flags: Reviewed
• Assignee: Chris Nauroth
• Reporter: Liang Xie
• Created: 16/Feb/15 11:49
• Updated: 30/Aug/16 01:31
• Resolved: 20/Feb/15 21:12

Description

Our product cluster hit the Xceiver limit even w/ HADOOP-10404 & HADOOP-11333, i found it was caused by DomainSocketWatcher.watcherThread gone. Attached is a possible fix, please review, thanks

Issue Links

• duplicates: HDFS-7802 Reach xceiver limit once the watcherThread die
• relates to: HADOOP-11333 Fix deadlock in DomainSocketWatcher when the notification pipe is full
• relates to: HADOOP-10404 Some accesses to DomainSocketWatcher#closed are not protected by lock