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Re: [jetty-users] ErrorHandler fallback from application to server
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- From: Tommy Becker <Thomas.Becker@xxxxxxxxx>
- Date: Mon, 27 Oct 2025 10:58:05 +0000
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- Thread-topic: [jetty-users] ErrorHandler fallback from application to server
Thanks for the response. Unless I’m missing something, it’s not possible to set the same handler as they are different types:
org.eclipse.jetty.ee8.nested.ErrorHandler vs org.eclipse.jetty.server.handler.ErrorHandler. I see the EE10 and 11 ErrorHandlers extend the server one but
the EE8 and 9 versions don’t.
From: Greg Wilkins <gregw@xxxxxxxxxxx>
Date: Sunday, October 26, 2025 at 4:18 PM
To: JETTY user mailing list <jetty-users@xxxxxxxxxxx>
Cc: Tommy Becker <Thomas.Becker@xxxxxxxxx>
Subject: Re: [jetty-users] ErrorHandler fallback from application to server
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There is a fallback from a context error handler to the server error handler. However, I see that the EE8 start is always setting an error handler if one is not already set. You can
just set the same error handler on both the server and context (although I do see an issue with stop/start cycles).
Experiment with this approach and then open an issue with any problems you encounter.
I’m migrating from Jetty 9 to 12.1 and had a question about the intended ErrorHandler behavior. I have a custom handler that I want to be used for all contexts (and no context) on the server, and I’m trying to avoid having 2 different implementations of it
for the server and my EE8 applications. Is there supposed to be some sort of fallback behavior wherein if a context does not have an ErrorHandler set it falls back to the server level one? The code in ErrorHandler.getErrorHandler() looks like it tries to
do this but I couldn’t get it to work. Thanks!
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