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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-10489) UserGroupInformation#getTokens and UserGroupInformation#addToken can lead to ConcurrentModificationException
Date Thu, 10 Apr 2014 21:26:15 GMT
Jing Zhao created HADOOP-10489:
----------------------------------

             Summary: UserGroupInformation#getTokens and UserGroupInformation#addToken can
lead to ConcurrentModificationException
                 Key: HADOOP-10489
                 URL: https://issues.apache.org/jira/browse/HADOOP-10489
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Jing Zhao


Currently UserGroupInformation#getTokens and UserGroupInformation#addToken uses UGI's monitor
to protect the iteration and modification of Credentials#tokenMap. Per [discussion|https://issues.apache.org/jira/browse/HADOOP-10475?focusedCommentId=13965851&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13965851]
in HADOOP-10475, this can still lead to ConcurrentModificationException.



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