LogConfigurationException after migrating from log4j1.x to log4j2.x

Question

I migrated log4j from 1.x to 2.x. After migration I am getting this error message:

org.apache.commoms.logging.LogConfigurationException: User-specified log class

org.apache.commons.logging.imple.Log4JLogger cannot be found or is not useable.

I verified that the commons-logging-1.2.jar file is available in WEB-INF/lib.

And also seen one more exception in console i.e:

com.sun.faces.config.ConfigurationException: source document: jar file tomahawk20-1.1.14.jar!/META-INF/faces-config.xml.

Cause: unable to create a new instance of org.apache.myfaces.webapp.filter.ServerResourcePhaseLostener.

What could be the problem here?

Answer 1

If you want to migrate from log4j1.x to log4j2.x then should import new jar. Log4j2 jars: log4j-api-2.y.z.jar, log4j-core-2.y.z.jar

Also, there is a document help migrate from 1.x to 2.x. so, follow the documentation.

Link : Migrating from Log4j 1.x