java.lang.NoSuchMethodError: org.apache.log4j.Logger

Question

We use ivy to manage a multi project java application, and recently this error started showing up when we do builds. What's causing this?

Answer 1

This was fixed by adding the following line to the end of the dependencies section in ivy.xml:

<dependencies>
         
  <exclude module="log4j-over-slf4j" /> 
</dependencies>

Why was it an issue?

• Looks like the log4j bridge for sjf4j has an incomplete implementation
• This url explains it in more detail.