Brian,
On 12/13/24 3:38 PM, Paquin, Brian wrote:
I am using Tomcat 10.1.30 with Tomcat Native and get these errors when user’s
connect to an application:
WARNING [https-openssl-nio-9443-exec-27]
org.apache.coyote.http2.Http2Parser.readSettingsFrame Connection [424], An
unknown setting with identifier [8] and value [1] was ignored
>
I suspect I need to make a change in my server.xml but I am not sure what needs
to be changed.
I don't think you need to change anything. The warning indicates that
the client is sending something the server doesn't understand at all.
Here is what I have for connectors (I can share more of server.xml if required):
<Connector port="9443"
protocol="org.apache.coyote.http11.Http11NioProtocol"
maxThreads="500" SSLEnabled="true" scheme="https" secure="true"
xpoweredBy="false" allowTrace="false">
<UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" />
<SSLHostConfig protocols="TLSv1.2">
<Certificate certificateKeyFile="conf/privatekey.key"
certificateFile="conf/certificate.crt"
certificateChainFile="conf/chain.crt"
type="RSA" />
</SSLHostConfig>
</Connector>
<Connector port="9009" protocol="AJP/1.3" redirectPort="9443"
secretRequired="false" />
Are there changes needed in the UpgradeProtocol I am missing?
I don't know enough about the protocol and the source of that warning
message to know what "identifier [8]" refers to. My guess is that it is
a SETTINGS frame type, only 0 - 6 have been defined, meaning that #8 is
undefined.
https://datatracker.ietf.org/doc/html/rfc7540#section-6.5.2
https://httpwg.org/specs/rfc7540.html#rfc.section.6.5.2
What h2 client is being used by these users?
-chris
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