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Eric Yang commented on YARN-8514: --------------------------------- This NPE is introduced by YARN-4983. UgiMetrics will not be initialized in UGI class, unless there is external code that calls: {code:java} UserGroupInformation.reattachMetrics();{code} There is a possibility that other new process encounter the same NPE in Kerberos enabled environment. It would be great if the reattachMetrics call can be initialized by itself without external invocation. > YARN RegistryDNS throws NPE when Kerberos tgt expires > ----------------------------------------------------- > > Key: YARN-8514 > URL: https://issues.apache.org/jira/browse/YARN-8514 > Project: Hadoop YARN > Issue Type: Bug > Reporter: Eric Yang > Priority: Critical > > After Kerberos ticket expires, RegistryDNS throws NPE error: > {code:java} > 2018-07-06 01:26:25,025 ERROR yarn.YarnUncaughtExceptionHandler > (YarnUncaughtExceptionHandler.java:uncaughtException(68)) - Thread Thread[TGT > Renewer for rm/host1.example....@example.com,5,main] threw an Exception. > java.lang.NullPointerException > at > javax.security.auth.kerberos.KerberosTicket.getEndTime(KerberosTicket.java:482) > at > org.apache.hadoop.security.UserGroupInformation$1.run(UserGroupInformation.java:894) > at java.lang.Thread.run(Thread.java:745){code} -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org