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https://issues.apache.org/jira/browse/RANGER-5708?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rohit Gupta resolved RANGER-5708.
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Resolution: Fixed
> Correct early publication of KnoxRangerPlugin in RangerPDPKnoxFilter
> --------------------------------------------------------------------
>
> Key: RANGER-5708
> URL: https://issues.apache.org/jira/browse/RANGER-5708
> Project: Ranger
> Issue Type: Bug
> Components: Ranger
> Affects Versions: 3.0.0
> Reporter: Rohit Gupta
> Assignee: Rohit Gupta
> Priority: Major
> Fix For: 3.0.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> We have a concurrency issue in knox-agent RangerPDPKnoxFilter.init().
> The static {{plugin}} field is published before it is initialized, and this
> can cause some concurrent requests to be forbidden. Multiple Knox topologies
> or multiple initial requests to the same Knox topology can create separate
> RangerPDPKnoxFilter instances. Some threads can see a non-null but still
> uninitialized {{KnoxRangerPlugin}} with a null policyEngine. The filter in
> this case would send a 403 response.
> Please correct the early publication of the plugin field in
> RangerPDPKnoxFilter.init()
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