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https://issues.apache.org/jira/browse/RANGER-3472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17428615#comment-17428615
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Xuze Yang commented on RANGER-3472:
-----------------------------------

cc: [~bpatel] [~brahmareddy].

Do you have any suggestions? Is there any special consideration for not having 
concurrency protection in the code that creates the policy?

> The createPolicy() method is not thread safe. In another word, we can create 
> policies with same resources when creating policies concurrently
> ---------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: RANGER-3472
>                 URL: https://issues.apache.org/jira/browse/RANGER-3472
>             Project: Ranger
>          Issue Type: Bug
>          Components: Ranger
>    Affects Versions: 2.1.0
>            Reporter: Xuze Yang
>            Priority: Major
>
> In our production environment, we happen to find that two policies exist with 
> the same resources.In this case, when we want to modify either policy, ranger 
> doesn't allow this operation and throws message like "*Error Code : 3010 
> Another policy already exists for matching resource: policy-name=[hhh9], 
> service=[default-Hdfs]*". 
> I go through the source code about create policy, find that the 
> createPolicy() in class ServiceREST is not thread safe. When we create 
> policies concurrently, we may create several policies with the same resources.



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