[YARN-3346] Deadlock in Capacity Scheduler

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Implemented
• Affects Version/s: 2.6.0
• Fix Version/s: 2.7.0, 2.6.1
• Component/s: capacityscheduler
• Assignee: Unassigned
• Reporter: Suma Shivaprasad
• Created: 12/Mar/15 23:44
• Updated: 30/Jun/15 07:20
• Resolved: 13/Mar/15 00:27

Description

Found one Java-level deadlock:
=============================
"2144051991@qtp-383501499-6":
  waiting to lock monitor 0x00007fa700eec8e8 (object 0x00000004589fec18, a org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica.FiCaSchedulerApp),
  which is held by "ResourceManager Event Processor"
"ResourceManager Event Processor":
  waiting to lock monitor 0x00007fa700aadf88 (object 0x0000000441c05ec8, a org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue),
  which is held by "IPC Server handler 0 on 54311"
"IPC Server handler 0 on 54311":
  waiting to lock monitor 0x00007fa700e20798 (object 0x0000000441d867f8, a org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue),
  which is held by "ResourceManager Event Processor"