[YARN-1929] DeadLock in RM when automatic failover is enabled.

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 2.4.1
• Component/s: resourcemanager

Environment

Yarn HA cluster

• Target Version/s: 2.4.1
• Hadoop Flags: Reviewed
• Assignee: Karthik Kambatla
• Reporter: Rohith Sharma K S
• Created: 11/Apr/14 14:07
• Updated: 03/Nov/14 18:06
• Resolved: 29/Apr/14 19:51

Description

Dead lock detected in RM when automatic failover is enabled.

Found one Java-level deadlock:
=============================
"Thread-2":
  waiting to lock monitor 0x00007fb514303cf0 (object 0x00000000ef153fd0, a org.apache.hadoop.ha.ActiveStandbyElector),
  which is held by "main-EventThread"
"main-EventThread":
  waiting to lock monitor 0x00007fb514750a48 (object 0x00000000ef154020, a org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService),
  which is held by "Thread-2"