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https://issues.apache.org/jira/browse/NIFI-4986?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Handermann resolved NIFI-4986.
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Resolution: Won't Fix
> Knox SSO token expiry handling (NiFi + Knox + SSO)
> --------------------------------------------------
>
> Key: NIFI-4986
> URL: https://issues.apache.org/jira/browse/NIFI-4986
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core UI
> Affects Versions: 1.5.0
> Reporter: Jeff Storck
> Priority: Major
>
> When NiFi is proxied through Knox using the SSOCookieProvider, the NiFi UI
> can not determine when the Knox SSO token has expired.
> The NiFI UI attempts to make API calls through Knox via XHRs
> (XMLHttpRequests), which end up receiving the Knox SSO login page as the
> response if the Knox SSO token has expired. Knox will be patched for this
> via [https://issues.apache.org/jira/browse/KNOX-1210|KNOX-1210], and a 401
> will be returned by the call to Knox if the token has expired.
> The NiFi UI will need a way to allow the user to log in through the KnoxSSO
> again after receiving a 401 in this scenario.
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