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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10826) Iteration on KeyProviderFactory.serviceLoader is thread-unsafe
Date Tue, 22 Jul 2014 15:42:38 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10826?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14070401#comment-14070401
] 

Alejandro Abdelnur commented on HADOOP-10826:
---------------------------------------------

+1

> Iteration on KeyProviderFactory.serviceLoader  is thread-unsafe
> ---------------------------------------------------------------
>
>                 Key: HADOOP-10826
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10826
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>            Reporter: Benoy Antony
>            Assignee: Benoy Antony
>         Attachments: HADOOP-10826.patch, HADOOP-10826.patch, HADOOP-10826.patch, HADOOP-10826.patch
>
>
> KeyProviderFactory uses _ServiceLoader_ framework to load _KeyProviderFactory_
> {code}
>   private static final ServiceLoader<KeyProviderFactory> serviceLoader =
>       ServiceLoader.load(KeyProviderFactory.class);
> {code}
> The _ServiceLoader_ framework does lazy initialization of services which makes it thread
unsafe. If accessed from multiple threads, it is better to synchronize the access.
> Similar synchronization has been done while loading compression codec providers via HADOOP-8406.



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