Oracle 11g application won't start sometimes(jar files issue)

Question

Hello,
The issue we experience is that now and then, our forms 11g application
won't start.
So it can be the case that, for example, the application can be started
succesfully 5 times in a row, but the 6th and 7th time, it won't start
anymore. But when we relaunch it for the 8th time, it launches perfectly.
When the application isn't starting, a new window is opened having a yellow triangle
with an exclamation mark on the top right corner.
After a long period, we suddely discovered that it had something to do with ".jar" files.
Because when we clear the "java jar cache" on the client machine
(start -> control panel -> java -> "general" tab -> "view..." button -> select all the files and click on the
cross(remove selected sources) ), the application succesfully starts for about 10 times in a row.
But the first time we start the application(after clearing the cache), it takes much longer, because the application
is downloading the .jar files again. (java logo appears with a progress bar)
But clearing the cache every time before starting the application can't be a decent solution we think.
When we enable all java debugging info in the console, we received the error below 2 times when launching a application session that refused to start:
java.security.AccessControlException: access denied (java.lang.RuntimePermission accessClassInPackage.sun.awt)
     at java.security.AccessControlContext.checkPermission(Unknown Source)
     at java.security.AccessController.checkPermission(Unknown Source)
     at java.lang.SecurityManager.checkPermission(Unknown Source)
     at java.lang.SecurityManager.checkPackageAccess(Unknown Source)
     at sun.plugin2.applet.Applet2SecurityManager.checkPackageAccess(Unknown Source)
     at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at oracle.forms.engine.Main.initDesktop(Unknown Source)
     at oracle.forms.engine.Main.start(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Anyone having a clue ?
thanks in advance !

Answer 1

Sorry, I meant WEB-INF\lib in the WAR file inside my EAR.
I put all the jar files in the WEB-INF\lib of the WAR file but it still does not work. I have to specify them in the classpaths and put the jar files in the domains\domain\lib directory
I thought if you put it in the WEB-INF\lib then you don't have to put them in the classpath.
Am I right?