Hi,
I have the same problem, it seems need inject cas credential in post
request.
在 2017年4月13日星期四 UTC+8下午9:46:54，Matt S.写道：
>
> Hi,
>
> When I access the CAS logout URL, the browser seems to show a successful
> logout but the CAS log shows the following error:
>
> ERROR [org.pac4j.cas.client.direct.DirectCasClient] - <Failed to retrieve
> or validate CAS credentials>
> org.pac4j.core.exception.CredentialsException: POST requests not supported
>
> We're using an external Tomcat, not the embedded Tomcat, so I'm not sure
> if this is related to the issue.
>
> Any suggestions?
>
> Thanks,
> Matt
>
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