Maven error - java.lang.NoClassDefFoundError: org/slf4j/helpers/MarkerIgnoringBase

Question

Getting up and running with Maven.

Trying to build a project I\'ve inherited. I\'ve resolved majority of the issues but am now seeing a weird error:

Answer 1

I had the same issue with my project..

The best way to avoid this problem that change your maven version..This problem is only with 3.3.3 version. So when I used 3.5.0 version, I got rid of this problem.

Answer 2

This happened to me when doing:

brew upgrade

It automatically updated my maven version to 3.3.3 that seems to have some issues as I was getting exactly the same message as the original post.

My solution was:

brew uninstall maven                               // to get rid of 3.3.3
brew install homebrew/versions/maven32             // to install maven 
brew pin homebrew/versions/maven32                 // to prevent unintended upgrade

And then make sure you have a line like this on ~/.bash_profile pointing to the correct maven path:

export M2_HOME=~/usr/local/Cellar/maven32/3.2.5    ~/.bash_profile 

Answer 3

I also had the same issue with content package plugin .17. I work for 2 clients and i had setup a new project and was using newest content package plugin i think version .24. Reverting to earlier maven version of 3.0.5 and restarting the command prompt worked for me.

Now, i have to switch between version. What a cool thing to do :(

Answer 4

Upgrade the version in POM.xml

<plugin>
                    <groupId>com.day.jcr.vault</groupId>
                    <artifactId>content-package-maven-plugin</artifactId>
                    <version>0.0.24</version>
                    <extensions>true</extensions>
                    <configuration>
                        <failOnError>true</failOnError>
                        <username>${crx.username}</username>
                        <password>${crx.password}</password>
                    </configuration>
                </plugin>

Hope, your problem will resolve.

Answer 5

I was able to solve on my OS X Mac by upgrading maven, e.g. 'brew upgrade maven' from 3.3.3 to 3.3.9 as tschaible suggested.