java.util.concurrent.ExecutionException when starting tomcat 7

Question

How to solve it?? I installed Java 7 and this occured when starting tomcat which has my application. I think the problem is based on my application. (
Tomcat 7 run successfully before. I installed java 7 and uninstall java 6 after this installation problem occured)

SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/m.apus]]
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/m.apus]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    ... 7 more
Caused by: java.lang.NoClassDefFoundError: javax/ejb/FinderException
    at java.lang.Class.getDeclaredFields0(Native Method)org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
    ... 21 more

• Edit

LifecycleException ocurred before I installed Java 7. I think this exception is not based on that. But I don't know why I encounter this exception.

Answer 1

Use Java EE libraries, there's files needed to support EJB. You've got java.lang.NoClassDefFoundError for the class that is in the library that implements Java EE specification. The file you you need is javax.ejb.jar from version 6 Java EE default reference implementation. Supply Java EE libraries with your Java web applications. Initially Tomcat has not support for EJB.

Answer 2

Tomcat 7 is not a (full) Java EE container. It is "just" a servlet/JSP server.

If you need EJBs, you'll need a full-fledged Java EE server such as Glassfish or JBoss