[jira] [Created] (YARN-2819) NPE in ATS Timeline Domains when upgrading from 2.4 to 2.6

[Gopal V (JIRA)]

Gopal V created YARN-2819:
-----------------------------

             Summary: NPE in ATS Timeline Domains when upgrading from 2.4 to 2.6
                 Key: YARN-2819
                 URL: https://issues.apache.org/jira/browse/YARN-2819
             Project: Hadoop YARN
          Issue Type: Bug
          Components: timelineserver
    Affects Versions: 2.6.0
            Reporter: Gopal V


{code}
Caused by: java.lang.NullPointerException
        at java.lang.String.<init>(String.java:554)
        at 
org.apache.hadoop.yarn.server.timeline.LeveldbTimelineStore.put(LeveldbTimelineStore.java:873)
        at 
org.apache.hadoop.yarn.server.timeline.LeveldbTimelineStore.put(LeveldbTimelineStore.java:1014)
        at 
org.apache.hadoop.yarn.server.timeline.TimelineDataManager.postEntities(TimelineDataManager.java:330)
        at 
org.apache.hadoop.yarn.server.timeline.webapp.TimelineWebServices.postEntities(TimelineWebServices.java:260)
{code}

triggered by 

{code}
entity.getRelatedEntities();
...
            } else {
              byte[] domainIdBytes = db.get(createDomainIdKey(
                  relatedEntityId, relatedEntityType, relatedEntityStartTime));
              // This is the existing entity
              String domainId = new String(domainIdBytes);
              if (!domainId.equals(entity.getDomainId())) {
{code}

The new String(domainIdBytes); throws an NPE.



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