We are seeing that Firefox triggers the HTTP2 overhead protection with
multipart file uploads. About 1MB is uploaded before overhead protection
is triggered. I believe a few weeks ago Chrome was triggering this too,
but it looks like a recent update may have resolved it.
This is on Tomcat 9.0.45 (though it applies to earlier versions too)
using the org.apache.coyote.http11.Http11NioProtocol connector with
upgrade to org.apache.coyote.http2.Http2Protocol.
With http2 debug logging enabled, there are occasional Payload size [1]
interspersed between larger payloads, though it appears to be a couple
of back-to-back Payload size [1]'s which may be triggering the
org.apache.coyote.http2.ConnectionException: Connection [0], Too much
overhead so the connection will be closed.
I've found earlier Tomcat conversations which seem to indicate it's a
client issue. I've searched through the Firefox bug tracker but have not
found anything that looks like this (feels like looking for a needle in
a haystack).
Is this a known issue in Tomcat or Firefox? It can be resolved by
disabling the protection or potentially just tweaking the config values,
but if it's a known Firefox issue I'd like to know if something has been
raised on their bug tracker I can follow?
Thanks
Leon
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