[
https://issues.apache.org/jira/browse/HADOOP-10489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14001900#comment-14001900
]
Daryn Sharp commented on HADOOP-10489:
--------------------------------------
+1 I think it looks ok. I almost wonder if some of the concurrent protection
should occur in the Credentials itself, but it's probably not trivial due to
the iterators.
> 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
> Assignee: Robert Kanter
> Attachments: HADOOP-10489.patch
>
>
> 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.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
