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Posted to common-dev@hadoop.apache.org by "Jing Zhao (JIRA)" <ji...@apache.org> on 2014/04/10 23:26:15 UTC

[jira] [Created] (HADOOP-10489) UserGroupInformation#getTokens and UserGroupInformation#addToken can lead to ConcurrentModificationException

Jing Zhao created HADOOP-10489:
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             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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