tomcat 8.5.35 warning using NIO 2 (or NIO) connector w APR: An unknown setting with identifier [2147483647] and value [2] was ignored

[John Palmer <jo...@gmail.com>]

I'm working with tomcat 8.5.35 to configure SSL....
(current system is tomcat 7.5 using JKS keystore and truststore)..

I finally have the certificate parts working with the default (commented
out) APR connector..
it bothers me (doesn't seem intuitive) that the logging shows
"useAprConnector [false]" as in:
INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent
APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true]

so I'm experimenting with changing the protocol section from:
<Connector port="8443" protocol="org.apache.coyote.http11.Http11AprProtocol"
to
<Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol"
(or
<Connector port="8443"
protocol="org.apache.coyote.http11.Http11Nio2Protocol"
)
since those are what are actually being used.....
but with either of those selected, each time a browser accesses the system,
the catalina log shows:
org.apache.coyote.http2.ConnectionSettingsBase.set Connection [0], An
unknown setting with identifier [2147483647] and value [2] was ignored
(this doesn't happen when the APR protocol is selected).
Any idea what setting this refers to?
(entire connector section below):

    <Connector port="443"
protocol="org.apache.coyote.http11.Http11Nio2Protocol"
               maxThreads="150" SSLEnabled="true" scheme="https"
secure="true" >
        <UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol"
/>
        <SSLHostConfig
            certificateVerification="optional"
            caCertificateFile="C:\certs\trustStore.cer"
            >
            <Certificate certificateKeyFile="C:\certs\tomcat.key"
                         certificateFile="C:\certs\tomcat.crt"
                         type="RSA"
                        certificateChainFile="C:\certs\keystore-chain.cer"
                        />
        </SSLHostConfig>
    </Connector>

Re: tomcat 8.5.35 warning using NIO 2 (or NIO) connector w APR: An unknown setting with identifier [2147483647] and value [2] was ignored

[Rémy Maucherat <re...@apache.org>]

On Thu, Dec 20, 2018 at 9:37 PM John Palmer <jo...@gmail.com> wrote:

> I'm working with tomcat 8.5.35 to configure SSL....
> (current system is tomcat 7.5 using JKS keystore and truststore)..
>
> I finally have the certificate parts working with the default (commented
> out) APR connector..
> it bothers me (doesn't seem intuitive) that the logging shows
> "useAprConnector [false]" as in:
> INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent
> APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true]
>
> so I'm experimenting with changing the protocol section from:
> <Connector port="8443"
> protocol="org.apache.coyote.http11.Http11AprProtocol"
> to
> <Connector port="8443"
> protocol="org.apache.coyote.http11.Http11NioProtocol"
> (or
> <Connector port="8443"
> protocol="org.apache.coyote.http11.Http11Nio2Protocol"
> )
> since those are what are actually being used.....
> but with either of those selected, each time a browser accesses the system,
> the catalina log shows:
> org.apache.coyote.http2.ConnectionSettingsBase.set Connection [0], An
> unknown setting with identifier [2147483647] and value [2] was ignored
> (this doesn't happen when the APR protocol is selected).
> Any idea what setting this refers to?
>

It means there was an unknown setting in the settings frame, and it's a non
fatal warning. The logging is not good because it logs the constant rather
than the unknown id, but then it's only an int.

Rémy