[YARN-10649] Fix RMNodeImpl.updateExistContainers leak - ASF JIRA

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Details

Type: Bug
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: 3.3.0
Fix Version/s: 3.4.0, 3.3.1
Component/s: resourcemanager
Labels:
- pull-request-available

Description

~~YARN-5168~~ the patch added RMNodeImpl.updatedExistContainers, but it didn't remove completed containers.

These objects (ContainerStatusPBImpl & ContainerIdPBImpl ) stay in RMNodeImpl.updatedExistContainers forever.
Because of this leak, ResourceManager in our production environment encountered OOM issue. We found 13 million ContainerStatusPBImpl objects in the heap dump file of ResourceManager.

The patch has been applied in our production env and so far it works well.