topic Re: SAS Studio redirecting too many times in Administration and Deployment

SAS Studio redirecting too many times

srinivasa_attot — Wed, 10 Sep 2025 08:43:08 GMT

Hi,

I have performed SASM7 to M8 in-place upgrade on multi node architecture. All the Tiers are successfully upgraded without errors. I even rebuild and deployed the web apps.

When i am trying to open sasstudio web page it is not loading properly or it gives an error "Redirecting too many times as below.

https://servername.xxx.com/SASLogon/SASLogon/SASLogon.... etc.....

Can someone please guide me on this?

Thanks in Advance

Srinivas

Re: SAS Studio redirecting too many times

gwootton — Wed, 10 Sep 2025 15:50:53 GMT

When you access SAS Studio and have not yet authenticated, SAS Studio would redirect you to /SASLogon to authenticate. From the URL there it looks like /SASLogon is being appended to the URL repeatedly through subsequent redirects, so this is probably a configuration issue either in the SAS Web Server or SAS Logon.
A Technical Support case would be appropriate to review your configuration.

Re: SAS Studio redirecting too many times

srinivasa_attot — Sun, 14 Sep 2025 14:51:28 GMT

Thank you. Opened a case with tech support. Seems it is a bug.

Regards,

Srinivas

Re: SAS Studio redirecting too many times

APeter0807 — Wed, 07 Jan 2026 16:41:13 GMT

For future readers to this thread, the issue was resolved fairly straightforwardly in our case. Paraphrased from a support ticket:

For this "Too many redirects" error, please find and comment following lines in '<SASConfig>/Lev1/Web/WebServer/conf/sas.conf' like so, using the hash symbol in front of each line:

# Set the X-Forwarded-Proto header if request is over HTTPS
# RewriteEngine On
# RewriteCond "%{HTTPS}" "on"
# RewriteRule ^.*$ - [ENV=HTTPS:true]
# RequestHeader set X-Forwarded-Proto https env=HTTPS

Save the sas.conf file. Then, restart SAS Web Server services.

Re: SAS Studio redirecting too many times

smopati — Wed, 07 Jan 2026 17:07:26 GMT

In some cases, if sas.conf file changes alone does not resolve the issue, in situations where a load balancer or reverse proxy is configured for middle tier, then you would also need to whitelist all the IP addresses of the load balancer or the reverse proxy under trustedProxies attribute in <SAS_CONFIG>/LevN/Web/WebAppServer/SASServerX_Y/conf/server.xml file. Changes to server.xml file will also need a restart of SAS Web Application Servers. Here is an example of how to add IP addresses to trustedProxies attribute as regular expression: trustedProxies="12\.345\.678\.90|23\.456\.789\.01"