I assume you are following the instructions here:
https://docs.geoserver.org/latest/en/user/production/container.html#enable-cors

These instructions are quite clear, your error message seems to indicate
you are running Jetty.

Looking at your attached web.xml the instructions have not been followed,
and the folllowing is stilled commented out:

   <!-- Uncomment following filter to enable CORS
   <filter>
        <filter-name>cross-origin</filter-name>

<filter-class>org.eclipse.jetty.servlets.CrossOriginFilter</filter-class>
    </filter> -->

And also:
    <!-- Uncomment following filter to enable CORS
     <filter-mapping>
        <filter-name>cross-origin</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>-->

It does appear the documentation is out of date, as the jetty section no
longer has stuff for allowedOrigins and allowedMethods.
--
Jody Garnett


On Jul 12, 2023 at 5:17:08 AM, Ujwal Vohra <ujwalvohra42...@gmail.com>
wrote:

> while working with geoserver  when i'm making changes in web.xml for cross
> origin and uncommenting cross origin filters to remove this error as under:
>
> *Cross-Origin Read Blocking (CORB) blocked cross-origin response <URL>
> with MIME type application/vnd.ogc.se_xml. See <URL> for more
> details.Cross-Origin Read Blocking (CORB) blocked cross-origin
> response........*
>  i am getting  the error as:
> *HTTP ERROR: 503 Problem accessing /geoserver/. Reason: Service
> Unavailable Powered by Jetty://*
> and it's not running the geoserver website.
>
> so both of these things are contradicting. Please resolve the issue if
> possible attaching the web.xml please make changes in that file and comment
> where you have made changes so that i get to know  what is there that we
> can do with those types of errors.
> --
> *Thanks & Regards *
> *Ujwal Singh Vohra*
>
>
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> Please make sure you read the following two resources before posting to
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>
> If you want to request a feature or an improvement, also see this:
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>
>
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_______________________________________________
Geoserver-users mailing list

Please make sure you read the following two resources before posting to this 
list:
- Earning your support instead of buying it, but Ian Turton: 
http://www.ianturton.com/talks/foss4g.html#/
- The GeoServer user list posting guidelines: 
http://geoserver.org/comm/userlist-guidelines.html

If you want to request a feature or an improvement, also see this: 
https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer


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