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Posted to dev@knox.apache.org by "Phil Zampino (JIRA)" <ji...@apache.org> on 2017/09/20 23:00:09 UTC

[jira] [Work started] (KNOX-1054) DefaultURLManager is not thread-safe

     [ https://issues.apache.org/jira/browse/KNOX-1054?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on KNOX-1054 started by Phil Zampino.
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> DefaultURLManager is not thread-safe
> ------------------------------------
>
>                 Key: KNOX-1054
>                 URL: https://issues.apache.org/jira/browse/KNOX-1054
>             Project: Apache Knox
>          Issue Type: Bug
>          Components: Server
>    Affects Versions: 0.13.0
>            Reporter: Phil Zampino
>            Assignee: Phil Zampino
>         Attachments: KNOX-1054.patch
>
>
> org.apache.hadoop.gateway.ha.provider.impl.DefaultURLManager is not thread-safe.
> Currently, only the "write" methods are subject to locking. Apparently, there are some assumptions being made about the behavior of the underlying ConcurrentLinkedQueue.
> For instance, if a thread is preempted in setActiveURL(String), and another thread invokes getActiveURL(), the urls.peek() result could be incorrect.



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