ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/servlet/HttpConstraintElement

Hi,

To my environment

  - Eclipse version 4.3.0
  - Google Plugin for Eclipse version 3.5.1
  - m2e  version 1.4.0
  - gwt-maven-plugin version 2.6.1
  - maven-war-plugin  version 2.1

My problem:

I am developing a maven project consisting of 3 modules. Two of them are GWT modules.
I managed to successfully compile the whole project (using gwt-maven-plugin) and building the
war (using maven-war-plugin).
When trying to launch the (GWT) application in eclipse I get the following exception:

Exception in thread "main" java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/servlet/HttpConstraintElement
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at com.google.gwt.dev.shell.jetty.JettyLauncher.createWebAppContext(JettyLauncher.java:744)
    at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:711)
    at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:522)
    at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1104)
    at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:844)
    at com.google.gwt.dev.DevMode.main(DevMode.java:322)

After Googling, I found out that I need a Javaee implementation, since java-api.jar contains no implementation.
This makes me really confused. I thought that the internal server used by GWT will provide a default implementation.
Can someone give me a hint on how to fix this problem.
Any idea is welcome.

Regards
Junior

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