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Job is fails with java.lang.NoClassDefFoundError: Could not initialize class error

Saty
New Contributor

hi,

It is scala code where we are connecting Redis to store (sparkcontext.toRedisKV) and i am also using scala udf . ihave excuted the same code in notebook without scala object and it works fine but everytime it fails when i am using same code in jar and excute it through job with  java.lang.NoClassDefFoundError: Could not initialize class error.

3 REPLIES 3

Aviral-Bhardwaj
Esteemed Contributor III

Please share code also

Anonymous
Not applicable

@Satish Kumbhar​ :

The java.lang.NoClassDefFoundError error typically occurs when a class that was present during compilation is not available at runtime.

Here are some possible solutions to try:

  1. Make sure that all required dependencies are included in your jar file and that they are properly configured. You may need to update your build file to ensure that all required dependencies are included in the jar file.
  2. Check the version compatibility of the dependencies. It's possible that the dependencies used in your code are not compatible with each other. Try updating the dependencies to ensure that they are all compatible with each other.
  3. Check if there are any conflicts between the dependencies. If multiple dependencies have the same class or package, it can cause conflicts and result in the
  4. NoClassDefFoundError error. You can try excluding the problematic dependency from the build or resolving the conflict by using a different version of the dependency.
  5. Check if the classpath is properly set up in your environment. Make sure that all the required dependencies and jars are included in the classpath.
  6. Try running your code with verbose logging to see if there are any additional error messages that can help diagnose the issue.

Hopefully one of these solutions will help you resolve the issue.

Anonymous
Not applicable

Hi @Satish Kumbhar​ 

Hope all is well! Just wanted to check in if you were able to resolve your issue and would you be happy to share the solution or mark an answer as best? Else please let us know if you need more help. 

We'd love to hear from you.

Thanks!

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