4.2.4. Find the JAR in the Previous Install

If the class is not found in a JAR packaged in a module defined by the server, find the JAR in your EAP5_HOME install or your prior server's lib/ directory.
For example, if you see this ClassNotFoundException trace in the log: 
Caused by: java.lang.NoClassDefFoundError: org/hibernate/validator/ClassValidator at java.lang.Class.getDeclaredMethods0(Native Method)
Find the JAR containing this class by doing the following:
  1. Open a terminal and navigate to the EAP5_HOME/ directory.
  2. Issue the command:
    grep 'org.hibernate.validator.ClassValidator' `find . \-name '*.jar'`
  3. You might see more than one result. In this case, the following result is the JAR we need: 
    Binary file ./jboss-eap-5.1/seam/lib/hibernate-validator.jar matches
  4. Copy this JAR to the application's lib/ directory.
    If you find that you need a large number of JARs, it may be easier to define a module for the classes. For more information, refer to Modules in the chapter entitled Get Started Developing Applications in the Development Guide for JBoss EAP 6 on https://access.redhat.com/site/documentation/JBoss_Enterprise_Application_Platform/.
  5. Rebuild and redeploy the application.
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