[YARN-4041] Slow delegation token renewal can severely prolong RM recovery

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.8.0, 2.7.2, 3.0.0-alpha1
• Component/s: resourcemanager
• Target Version/s: 2.7.2
• Hadoop Flags: Reviewed
• Assignee: Sunil G
• Reporter: Jason Darrell Lowe
• Created: 10/Aug/15 18:27
• Updated: 06/Jan/17 01:49
• Resolved: 23/Oct/15 21:01

Description

When the RM does a work-preserving restart it synchronously tries to renew delegation tokens for every active application. If a token server happens to be down or is running slow and a lot of the active apps were using tokens from that server then it can have a huge impact on the time it takes the RM to process the restart.

Issue Links

• duplicates: YARN-3639 It takes too long time for RM to recover all apps if the original active RM and NN go down at the same time.
• is related to: YARN-3639 It takes too long time for RM to recover all apps if the original active RM and NN go down at the same time.