[YARN-2602] Generic History Service of TimelineServer sometimes not able to handle NPE

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.6.0
• Component/s: timelineserver

Environment

ATS is running with AHS/GHS enabled to use TimelineStore.
Running for 4-5 days, with many random example jobs running

• Target Version/s: 2.6.0
• Hadoop Flags: Reviewed
• Assignee: Zhijie Shen
• Reporter: Karam Singh
• Created: 25/Sep/14 06:08
• Updated: 01/Dec/14 03:07
• Resolved: 30/Sep/14 23:47

Description

ATS is running with AHS/GHS enabled to use TimelineStore.
Running for 4-5 day, with many random example jobs running .
When I ran WS API for AHS/GHS:

curl --negotiate -u : 'http://<TIMELINE_SERFVER_WEPBAPP_ADDR>/v1/applicationhistory/apps/application_1411579118376_0001'

It ran successfully.
However

curl --negotiate -u : 'http://<TIMELINE_SERFVER_WEPBAPP_ADDR>/ws/v1/applicationhistory/apps'
{"exception":"WebApplicationException","message":"java.lang.NullPointerException","javaClassName":"javax.ws.rs.WebApplicationException"}

Failed with Internal server error 500.
After looking at TimelineServer logs found that there was NPE: