[SOLVED] java.lang.UnsupportedOperationException: HTTP upgrade is not supported by this protocol

Error added: 2020-12-28T15:25:07Z

2 people waiting for the answer...

2 answers found.

Answer 2633 (100.0% helpful)

If you're using Websockets, I couldn't find out a way to proxy them to the AJP/1.3 connector.

I got it working by enabling the HTTP/1.1 connector, and proxying the WS requests to ws://

Answer 2634 (100.0% helpful)

It'd be nice if the exception said which protocol it was

Add an answer/solution

If you know the answer, please add your own solution below.
If you don't know, but find out later, please come back and share your answer - there will be other people struggling with this too.

Please enter 61948 here

If you want to be notified via email when this is solved, enter your email address here: