Download Slf4j-nop.jar

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Adding one of the jar from *slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar* to the class path should solve the problem.

Failed to load class org.slf4j.impl.StaticLoggerBinderThis warning message is reported when the org.slf4j.impl.StaticLoggerBinder class could not be loaded into memory. This happens when no appropriate SLF4J binding could be found on the class path. Placing one (and only one) of slf4j-nop.jar slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem.

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If you are responsible for packaging an application and do not care about logging, then placing slf4j-nop.jar on the class path of your application will get rid of this warning message. Note that embedded components such as libraries or frameworks should not declare a dependency on any SLF4J binding but only depend on slf4j-api. When a library declares a compile-time dependency on a SLF4J binding, it imposes that binding on the end-user, thus negating SLF4J's purpose.

This warning message is reported when the org.slf4j.impl.StaticLoggerBinder class could not be loaded into memory. This happens when no appropriate SLF4J binding could be found on the class path. Placing one (and only one) of slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem.

This warning message is reported when the org.slf4j.impl.StaticLoggerBinder class could not be loaded into memory. This happens when no appropriate SLF4J binding could be found on the class path. Placing one (and only one) of slf4j-nop.jar slf4j-simple.jar , slf4j-log4j12.jar , slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem.

"SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".SLF4J: Defaulting to no-operation (NOP) logger implementationSLF4J: See for further details."

I import different SLF4J tasks like slf4j-nop.jar slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar i download them from maven repository and add by gradle and nothing...

This error is reported when the org.slf4j.impl.StaticLoggerBinder class could not be loaded into memory. This happens when no appropriate SLF4J binding could be found on the class path. Placing one (and only one) of slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem.

SINCE 1.6.0 As of SLF4J version 1.6, in the absence of a binding, SLF4J will default to a no-operation (NOP) logger implementation.

You can download SLF4J bindings from the project download page.

I loaded on of the mentioned files, in my case "slf4j-simple-1.6.2" but now I do not know where to put it and how to bin it on the classpath. In my Maven project there is a file called ".classpath".

The content of this file is:

Does anyone know how I can bind the above mentioned file to the classpath?

Is it actually this file ".classpath" where I have to bind the file slf4j-simple-1.6.2 or do I have to bind it somewhere else?

Thanks,

Sebastian

Neil Barton wrote:I have followed the instructions @ and put a dependency in my POM.XML for slf4j-nop.jar (I've tried slf4j-simple.jar too!) but that makes no difference. How can I get rid of these warnings?

This error is reported when the LoggerFactory class could not find an appropriate binding. Placing one (and only one) of slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should prove to be an effective remedy.

This error indicates that appropriate SLF4J binding could not be found on the class path. Placing one (and only one) of slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem.

This warning, i.e. not an error, message is reported when no SLF4J providers could be found on the class path. Placing one (and only one) of slf4j-nop.jar slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem. Note that these providers must target slf4j-api 1.8 or later.

SLF4J supports multiple logging systems, namely, NOP, Simple, log4j version 1.2, JDK 1.4 logging, JCL and logback. The SLF4J distribution ships with several jar files slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-log4j13.jar, slf4j-jdk14.jar and slf4j-jcl.jar. Each of these jar files is hardwired at compile-time to use just one implementation, that is NOP, Simple, log4j version 1.2, JDK 1.4 logging, and repectively JCL. As of SLF4J version 1.1.0, all of the bindings shipped with SLF4J depend on slf4j-api.jar which must be present on the class path for the binding to function properly. The figure below illustrates the general idea.

If you are building a runtime that actually does logging, one (and only one) of slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar must be added to the classpath. If you add more than one binding to the classpath, you will see "Class path contains multiple SLF4J bindings" (see below for more details). Note that slf4j-nop.jar provide just null logging. 006ab0faaa