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https://issues.apache.org/jira/browse/SHIRO-379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jono Morris updated SHIRO-379:
------------------------------

    Attachment: shiro_379.diff

Adds a lock to SimpleAccountRealm for mutual exclusion
                
> SimpleAccoutRealm concurrency access to roles and users
> -------------------------------------------------------
>
>                 Key: SHIRO-379
>                 URL: https://issues.apache.org/jira/browse/SHIRO-379
>             Project: Shiro
>          Issue Type: Bug
>          Components: Realms 
>    Affects Versions: 1.2.0
>         Environment: Apache Tomcat 6.0.35, Win 7 x64, JDK 1.6.0_32 x64
>            Reporter: Ludovic Garcia
>            Priority: Minor
>         Attachments: shiro_379.diff
>
>
> I'm using a PropertiesRealm which automatically reload Users and roles if the 
> resource has been modified.
> And i noticed that authenticating an user and reloading properties file in 
> the same time, authenticating do not wait for reloading to be finished. 
> Should not SimpleAccountRealm be refactored in order to lock authentication 
> while modifying users / roles?
> We should simply acquire a Mutex in order to retrieve users / roles or adding 
> / removing users?
> An other way to ensure concurrency should be to use 
> Collections.synchronizedMap() for users' map and roles' map, but while 
> reloading resource, authentications won't wait for the reloading to be 
> finished.
> I can do required changes if it helps 

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