[ https://issues.apache.org/jira/browse/HADOOP-15597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Eric Yang resolved HADOOP-15597. -------------------------------- Resolution: Duplicate > UserGroupInformation class throws NPE when Kerberos TGT expired > --------------------------------------------------------------- > > Key: HADOOP-15597 > URL: https://issues.apache.org/jira/browse/HADOOP-15597 > Project: Hadoop Common > Issue Type: Bug > Components: security > Affects Versions: 2.9.0, 3.0.0, 3.1.0, 2.9.1, 3.0.1, 3.0.2, 2.9.2 > Reporter: Eric Yang > Priority: Critical > > UserGroupInformation class throws NPE RuntimeException when tgt renewer can > not determine expiration time: > {code} > 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} > The error occurs when Hadoop daemon processes uses UGI class to do service > tgt renewal. The code is written that reattachMetrics() must be called by > the main program to initialize UGI metrics. Metrics initialization is only > called by resource manager. Other Hadoop processes do not call > reattachMetrics(). The runtime exception could cause interruption to Hadoop > services as observed in YARN RegistryDNS (YARN-8514). It would be nice if > metrics initialization happens in UGI class without reliance on Hadoop > program to make UGI metrics initialization. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org