Removing the unnecessary warning when default exception mapper is disabled

[moghaddam]

When the default exception mapper in MicroProfile Rest Client is disabled by setting the microprofile.rest.client.disable.default.mapper=true, a warning appears in the log for every single calls to RestClientBuilderImpl.build(). The log is added in resteasy/resteasy#2850 and you can see that there is also a comment by reviewer about reducing the log level for this message to debug, but it got merged anyway.

I was wondering if it should really be considered as warning 🤔

We have recently upgraded to WildFly 26 and there are tons of such warnings in the log while it's an expected behavior in our case. I think others could have had a similar issue too.

[jamezp]

This does look like it should be reduced. I think even a debug is overkill as it shouldn't be logged that many times IMO.

As a temporary workaround you could disable the logger for that specific category since luckily it appears to have it's own. With CLI it would be something like:

/subsystem=logging/logger=org.jboss.resteasy.microprofile.client.ExceptionMapping.HandlerException:add(level=ERROR)

[moghaddam]

Yes. That's exactly what I did. Would it be ok if I send a PR for that to remove the log?

[jamezp]

Yes that would be great. After looking at it again I do think a debug message makes sense though.

[moghaddam]

I just sent the #49 PR for this.