Detected both log4j-over-slf4j.jar AND slf4j-log4j12.jar on the class path, preempting StackOverflowError.

Question

I have used xuggle library in my project to trans code the video from mp4 to flv. I have used slf4j libraries also to support logging end.

import com.xuggle.mediatool.IMediaReader; import com.xuggle.mediatool.IMediaViewer; import com.xuggle.mediatool.IMediaWriter; import com.xuggle.mediatool.ToolFactory;  public class TranscodingExample {      private static final String inputFilename = "E:\\VIDEO\\Facebook.mp4";     private static final String outputFilename = "E:\\VIDEO\\Facebook.flv";      public static void main(String[] args) {          // create a media reader         IMediaReader mediaReader =                 ToolFactory.makeReader(inputFilename);          // create a media writer         IMediaWriter mediaWriter =                 ToolFactory.makeWriter(outputFilename, mediaReader);          // add a writer to the reader, to create the output file         mediaReader.addListener(mediaWriter);          // create a media viewer with stats enabled         IMediaViewer mediaViewer = ToolFactory.makeViewer(true);          // add a viewer to the reader, to see the decoded media         mediaReader.addListener(mediaViewer);          // read and decode packets from the source file and         // and dispatch decoded audio and video to the writer         while (mediaReader.readPacket() == null) ;      }  } 

Here I am getting an error

"Detected both log4j-over-slf4j.jar AND slf4j-log4j12.jar on the class path, preempting StackOverflowError.".  

I have used both jar files as libraries in order to solve logging problems. Does any one faced the same problem.If so kindly write suggestion or solution to come out of this mess. Thanks in advance.

Answer 1

So you have to exclude conflict dependencies. Try this:

<exclusions>   <exclusion>      <groupId>org.slf4j</groupId>     <artifactId>slf4j-log4j12</artifactId>   </exclusion>   <exclusion>      <groupId>log4j</groupId>     <artifactId>log4j</artifactId>   </exclusion> </exclusions>  

This solved same problem with slf4j and Dozer.

Answer 2

Encountered a similar error, this how I resolved it:

1. Access Project explorer view on Netbeans IDE 8.2. Proceed to your project under Dependencies hover the cursor over the log4j-over-slf4j.jar to view the which which dependencies have indirectly imported as shown below.

2. Right click an import jar file and select Exclude Dependency

3. To confirm, open your pom.xml file you will notice the exclusion element as below.

4. Initiate maven clean install and run your project. Good luck!