net::ERR_HTTP2_PROTOCOL_ERROR with 10.1.30

[Ahmed Ashour]

Hi all,
Even though the regression should have been fixed in 10.1.30, our team still 
sees it around once weekly. Twice so far.
With 10.1.29 it was very frequent, that the server can't be used, but with 
10.1.30 it is much less, but sadly it seems on rare occasions to occur.

I understand the difficulty of reproducing it, but a hint about using Chrome 
could be beneficial, as it seems it doesn't happen with Firefox for example.
Remarking the UpgradeProtocol configuration makes the team uses the application 
server again.

Please let me know if anything to be done to help in this regard.

Thanks a lot,Ahmed Ashour

Setting Transfer-Encoding: chunked

[Lazar Kirchev]

Hello,

Tomcat automatically adds header Transfer-Encoding: chunked if on http 1.1,
the response code supports body and there is no Connection: Close header
(Tomcat 9's code -
https://github.com/apache/tomcat/blob/372f3cefe6225b58fcdae7c344d81396b8e08570/java/org/apache/coyote/http11/Http11Processor.java#L935
).
However, if the application has already set this header, then the header
gets duplicated. There is no check if the header is already present. Is
this intended behavior?

Kind regards,
Lazar