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Posted to common-issues@hadoop.apache.org by "zhaoyunjiong (JIRA)" <ji...@apache.org> on 2014/10/27 08:36:34 UTC

[jira] [Updated] (HADOOP-11234) Potential thread unsafe in NetgroupCache

     [ https://issues.apache.org/jira/browse/HADOOP-11234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

zhaoyunjiong updated HADOOP-11234:
----------------------------------
    Attachment: HADOOP-11234.patch

Add volatile for netgroupToUsersMapUpdated.
No need to add unit test.

> Potential thread unsafe in NetgroupCache
> ----------------------------------------
>
>                 Key: HADOOP-11234
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11234
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>            Reporter: zhaoyunjiong
>            Assignee: zhaoyunjiong
>            Priority: Minor
>         Attachments: HADOOP-11234.patch
>
>
> In function getNetgroups:
> {code}
>     if(netgroupToUsersMapUpdated) {
>       netgroupToUsersMapUpdated = false; // at the beginning to avoid race
> {code}
> However, netgroupToUsersMapUpdated was not thread safe:
> {code}
> private static boolean netgroupToUsersMapUpdated = true;
> {code}



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