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kotlinlang

Running *commonTest* in a *KMM project*:
when I call a function that uses *Ktor Client*
I get this warning:
```SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See <http://www.slf4j.org/codes.html#StaticLoggerBinder> for further details.```
is it normal?

What are your dependencies? You need a logger implementation if you want logging.

I just realized that the warning also happens when I run the app normally, not just while testing

In commonMain I have this dependency:
```implementation("io.ktor:ktor-client-logging:1.5.1")```

These are all the Ktor dependencies I have in CommonMain:
```implementation("io.ktor:ktor-client-core:${Versions.ktor}")
implementation("io.ktor:ktor-client-json:${Versions.ktor}")
implementation("io.ktor:ktor-client-logging:${Versions.ktor}")
implementation("io.ktor:ktor-client-serialization:${Versions.ktor}")```


One way to fix that issue:
<https://gitlab.com/braindot/clovis/-/blob/master/server/build.gradle.kts|https://gitlab.com/braindot/clovis/-/blob/master/server/build.gradle.kts>

It really depends on which engine you want to use

If you want to go with Log back, you will also need this file: <https://gitlab.com/braindot/clovis/-/blob/master/server/src/main/resources/logback.xml|https://gitlab.com/braindot/clovis/-/blob/master/server/src/main/resources/logback.xml>

I am using Ktor Client on a multiplatform project, on commonMain. It seems logback is JVM only.
So, I don’t think I can add it as a dependency in CommonMain.

Is everyone using Ktor Client on Common Main having the same issue?

Oh, the only two times I had this issue were JVM-only projects. Maybe there are other artifacts for other platforms, not sure.

I was running an Android app, so that's why

<@UEBPA7J8J> Yes and that warning is only printed when running on jvm. Other platforms don't get that warning. Adding logback to the jvm and/or android target should solve your problem