Springboot uses JarLauncher so that a nested jar is supported.
But the agent code do not load class by using JarLauncher because it executes before the main method.As a result, the console will print
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
--update
This issue can reproduce the problem.
https://github.com/libinglong/skywalking-threadpool-agent/issues/2
Related
I am using a self code logger and i dont want implement to slf4j.
And Jetty will prints:
SLF4J: No SLF4J providers were found.
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#noProviders for further details.
How to disable this stupid output?
Im not using Spring or something like that. I just import jetty library and it prints...
Use a slf4j-nop logger
Add this in dependencies block of build.gradle
kotlin DSL:
implementation("org.slf4j:slf4j-nop:2.0.0-alpha1")
How to resolve the problem of 'SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”' when running SoapUI (mine is 5.2.1) command-line testrunner.bat?
NOTE: This problem had been answered in a number of places for Maven, Eclipse, etc. but not for SoapUI. E.g.:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". in a Maven Project
The problem, as explained in http://www.slf4j.org/codes.html is that one (and only one) of the following is missing in the classpath: slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar.
I found that adding, e.g. slf4j-simple.jar to [SoapUI-Base]/bin/ext did not work, even though it apparently loaded it:
13:02:26,203 INFO [SoapUI] Adding [C:\Program Files\SmartBear\SoapUI-5.2.1\bin\ext\slf4j-simple-1.6.1.jar] to extensions classpath
13:02:26,983 INFO [DefaultSoapUICore] initialized soapui-settings from [C:\Users\XXX\soapui-settings.xml]
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
What worked was to place slf4j-simple.jar, and more specifically, slf4j-simple-1.6.1.jar (to be compatible with the SLF4J version used in SoapUI 5.2.1) into [SoapUI-Base]/lib.
Hope this helps.
this is solution that help me.
I have downloaded last slf4j package from http://www.slf4j.org/download.html
Delete from SmartBear\SoapUI-5.2.1\lib file slf4j-api
Insert to the SmartBear\SoapUI-5.2.1\lib files from package slf4j-api and slf4j-nop
Now everything works fine.
I'm new with Hadoop and during one MapReduce task I got the following error:
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.
15/09/18 07:31:10 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
How can I solve this?
Thanks!
Here's what your errors mean:
For SLF4J:
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.
As you can tell, you do not have the appropriate class (*Failed to load class*) for SLF4J to work so it defaults to no logging ((NOP) logger implementation). Following the suggested link you can see that the solution for this is:
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
For Hadoop:
15/09/18 07:31:10 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
This just means that the native library cannot be found, it generally doesn't affect the way Hadoop functions. As for the native library:
The native library just contains implementations of certain components for performance reasons and for non-availability of Java implementations. These components are available in a single, dynamically-linked native library called the native hadoop library. On the *nix platforms the library is named libhadoop.so.
Anyway, if you really want to get rid of the warning, you can follow one of the many solutions offered here.
I am using The Java Wiki Bot Framework to do changes in a mediawiki website using java, and it works fine. The only problem is that the JWBF produces a a huge volume of debugging information in the console of my application that is overshadowing my output and make it hard to find, visually. is their anyway that I could stop the logging for JWBF? BTW, JWBF uses SL4J for logging.
This is a slf4j related topic. If no logger binding is defined, you see the following
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.
If you add a binding e.g. Logback, you can reduce logging output. Your logback.xml should contains a line like
...
<logger name="net.sourceforge.jwbf" level="ERROR"/>
...
For more details see Logback configuration
I was working on creating my first Xuggler media application. I was coding by watching their video on how to create the first media application.
Code
package demo;
import com.xuggle.xuggler.IContainer;
public class GetContainerInfo {
public static void main(String[] args) {
if(args.length!=1){
throw new IllegalArgumentException("no file");
}
IContainer container = IContainer.make();
if(container.open(args[0],IContainer.Type.READ,null)<0){
throw new IllegalArgumentException("could not open");
}
}
}
Error
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.
Do I have the dependencies?
Yes, I do! I have all the dependencies. I imported them while creating the project.
Image:
What is causing that error and how do I solve it?
From SLF4J manual:
> 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.
This warning is printed because no slf4j binding could be found on
your class path. The warning will disappear as soon as you add a
binding to your class path. Assuming you add slf4j-simple-1.7.2.jar so
that your class path contains: slf4j-api-1.7.2.jar
slf4j-simple-1.7.2.jar ...
Cause Could be un-availability of dependency jars or version conflicts.
Adding the following jars in the class path worked fine for me:
xuggle-xuggler-5.4.jar
slf4j-api-1.6.4.jar
logback-core-1.0.0.jar
logback-classic-1.0.0.jar