[YARN-3857] Memory leak in ResourceManager with SIMPLE mode

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.7.0, 2.6.2
• Fix Version/s: 2.8.0, 2.7.2, 2.6.4, 3.0.0-alpha1
• Component/s: resourcemanager
• Labels: patch
• Target Version/s: 2.6.4
• Hadoop Flags: Reviewed
• Assignee: mujunchao
• Reporter: mujunchao
• Created: 26/Jun/15 10:13
• Updated: 06/Jan/17 00:51
• Resolved: 18/Aug/15 19:21

Description

We register the ClientTokenMasterKey to avoid client may hold an invalid ClientToken after RM restarts. In SIMPLE mode, we register Pair<ApplicationAttemptId, null> , But we never remove it from HashMap, as unregister only runing while in Security mode, so memory leak coming.