Can't get SLF4J logging to work

I am trying to get slf4j to work within the notebooks because some 3rd party libs that I use need it. When I try to set jshell classpath directly through --class-path it works. If I set IJAVA_CLASSPATH in kernel.json to point to the logging jars or when I import them in the notebook, it does not work, it says SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".

%maven org.slf4j:slf4j-api:1.7.16
%maven ch.qos.logback:logback-classic:1.0.13    
 
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.impl.StaticLoggerBinder;

Logger slf4jLogger = LoggerFactory.getLogger("T");
slf4jLogger.warn("Hi, {}", "Test");

[SpencerPark]

Thank you for the report. I was able to reproduce and can confirm this is a bug.

Classpath related things are an ongoing issue with all the dynamic loading going on in this environment. I’ve been trying to find a fix but the closest I’ve gotten in with the newest beta version and manually loading things which still has some warnings but eventually does log something. I will continue to investigate and update when I get a chance.

In case you are curious this is what I am referring to is the following which essentially pulls out the code from slf4j that loads the logger.

%maven org.slf4j:slf4j-api:jar:1.8.0-beta2
%maven ch.qos.logback:logback-classic:jar:1.3.0-alpha4

import org.slf4j.spi.SLF4JServiceProvider;

ServiceLoader<SLF4JServiceProvider> serviceLoader = ServiceLoader.load(SLF4JServiceProvider.class);
List<SLF4JServiceProvider> providerList = new ArrayList<SLF4JServiceProvider>();
for (SLF4JServiceProvider provider : serviceLoader)
    providerList.add(provider);
    
providerList.get(0).initialize();
providerList.get(0).getLoggerFactory().getLogger("JupyterNotebook").info("HelloWorld")

[aelkayesh]

Thank you a million 😃 It works as needed so far.