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https://issues.apache.org/jira/browse/KNOX-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sandor Molnar resolved KNOX-3175.
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Resolution: Fixed
> Client credential flow validation drains request body
> -----------------------------------------------------
>
> Key: KNOX-3175
> URL: https://issues.apache.org/jira/browse/KNOX-3175
> Project: Apache Knox
> Issue Type: Bug
> Components: Server
> Affects Versions: 2.0.0
> Reporter: Sandor Molnar
> Assignee: Sandor Molnar
> Priority: Critical
> Fix For: 2.1.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Testing a simple Passcode token flow between Knox and Hive (using beeline)
> constantly fails because the authentication challenge is aborted due to Knox
> cuts the connection during that operation.
> The reason for that is that Knox consumes the entire request body to find out
> if this is a Client Credentials flow. We don't need to read those parameters
> from the request body because Servlet API extracts parameters from
> form-encoded POST requests (which is the case for OAuth flows).
> We should also preserve the check we added in the scope of KNOX-3037: the
> client secret parameter MUST NOT be present as a query param.
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