javax.ws.rs.WebApplicationException: java.lang.NullPointerException

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java.lang.NullPointerException:
at org.apache.hadoop.yarn.server.applicationhistoryservice.ApplicationHistoryManagerOnTimelineStore.convertToApplicationReport(ApplicationHistoryManagerOnTimelineStore.java:228)
at org.apache.hadoop.yarn.server.applicationhistoryservice.ApplicationHistoryManagerOnTimelineStore.generateApplicationReport(ApplicationHistoryManagerOnTimelineStore.java:482)
at org.apache.hadoop.yarn.server.webapp.WebServices$1.run(WebServices.java:149)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)

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