[YARN-355] RM app submission jams under load

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha, 0.23.6
• Fix Version/s: 2.0.3-alpha, 0.23.7
• Component/s: resourcemanager
• Target Version/s: 2.0.3-alpha, 0.23.7
• Assignee: Daryn Sharp
• Reporter: Daryn Sharp
• Created: 23/Jan/13 16:31
• Updated: 15/Feb/13 13:12
• Resolved: 06/Feb/13 19:07

Description

The RM performs a loopback connection to itself to renew its own tokens. If app submissions consume all RPC handlers for ClientRMProtocol, then app submissions block because it cannot loopback to itself to do the renewal.