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https://issues.apache.org/jira/browse/SLING-4143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14208072#comment-14208072
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Felix Meschberger commented on SLING-4143:
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No, I would not expose this information to the client at all. Just keep it in
the log file, where it belongs for systems managament to pick it up.
> Exception or Error in error handler script/servlet should cause HTTP status
> 500
> -------------------------------------------------------------------------------
>
> Key: SLING-4143
> URL: https://issues.apache.org/jira/browse/SLING-4143
> Project: Sling
> Issue Type: Bug
> Components: Engine
> Affects Versions: Servlets Resolver 2.3.2, Engine 2.3.8
> Reporter: Bertrand Delacretaz
> Assignee: Bertrand Delacretaz
> Fix For: Servlets Resolver 2.3.4, Engine 2.3.10
>
>
> It looks like Sling does not set the response status if a custom error
> handler script is present which does not set the status itself. See examples
> below.
> I think Sling should detect this and set a sensible non-200 status in this
> case.
> Example 1: script doesn't set status _(update: after discussion on list we
> won't change this)_
> {code}
> $ cat > 404.jsp
> <html>Custom 404 page</html>
> $ curl -u admin:admin -T 404.jsp
> http://localhost:8888/apps/sling/servlet/errorhandler/404.jsp
> $ curl -D - http://localhost:8888/nonexisting
> HTTP/1.1 200 OK
> ...
> <html>Custom 404 page</html>
> {code}
> Example 2, scripts throws a RuntimeException - blank response with 200 status
> - this is wrong
> {code}
> $ cat > 404.jsp
> <% if(true) throw new RuntimeException("404 page failed"); %>
> $ curl -u admin:admin -T 404.jsp
> http://localhost:8888/apps/sling/servlet/errorhandler/404.jsp
> $ curl -D - http://localhost:8888/nonexisting
> HTTP/1.1 200 OK
> ...
> Content-Length: 0
> Server: Jetty(7.x.y-SNAPSHOT)
> {code}
> Example 3: scripts sets status - this one looks correct.
> {code}
> $ cat > 404.jsp
> <% response.setStatus(421); %>
> Custom 421 page
> $ curl -u admin:admin -T 404.jsp
> http://localhost:8888/apps/sling/servlet/errorhandler/404.jsp
> $ curl -D - http://localhost:8888/nonexisting
> HTTP/1.1 421 421
> ...
> Server: Jetty(7.x.y-SNAPSHOT)
> Custom 421 page
> {code}
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