[jira] [Created] (YARN-8521) NPE in AllocationTagsManager when a container is removed more than once

["Weiwei Yang (JIRA)" <ji...@apache.org>]

Weiwei Yang created YARN-8521:
---------------------------------

             Summary: NPE in AllocationTagsManager when a container is removed more than once
                 Key: YARN-8521
                 URL: https://issues.apache.org/jira/browse/YARN-8521
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 3.1.0
            Reporter: Weiwei Yang
            Assignee: Weiwei Yang


We've seen sometimes there is NPE in AllocationTagsManager

{code}

private void removeTagFromInnerMap(Map<String, Long> innerMap, String tag) {
  Long count = innerMap.get(tag);
  if (count > 1) { // NPE

  ...

{code}

it seems \{{AllocationTagsManager#removeContainer}} somehow gets called more than once for a same container.

 



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