[YARN-9198] Corrupted state from a previous version can still cause RM to fail with NPE on FairScheduler

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.1.0, 2.8.5
• Component/s: fairscheduler, resourcemanager
• Assignee: Dapeng Sun
• Reporter: Dapeng Sun
• Created: 14/Jan/19 09:19
• Updated: 26/Feb/20 08:07

Description

Previously, RM may fail with NPE due to YARN-4347,YARN-4000. After these fixes, FairScheduler still has the same potential issue.

 
201x-xx-xx xx:xx:xx,xxx ERROR resourcemanager.ResourceManager (ResourceManager.java:serviceStart) - Failed to load/recover state
java.lang.NullPointerException
at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.addApplicationAttempt(FairScheduler.java)