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From "Benoy Antony (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-10826) Iteration on KeyProviderFactory.serviceLoader is thread-unsafe
Date Mon, 21 Jul 2014 23:56:42 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-10826?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Benoy Antony updated HADOOP-10826:
----------------------------------

    Attachment: HADOOP-10826.patch

Attaching patch which loads the _KeyProviderFactory_ during class init time.

> 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
>
>
> 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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