When get into ESR ,,error - java.lang.NoClassDefFoundError

Hi expert!!
I got the error ( java.lang.NoClassDefFoundError) when getting into ESR..
for the detail , occured after clicking logon buttom.
the error occured when getting into ESR only. no problem with ID, RWB, SR, SLD, NWA.
i used JDK 1.6 with my laptop, but once got the above error,
i tried to change JDK 1.6.0_24 to 1.5.0_22, but same happened.
restore achives and generate new signature didn't help this error.
all of host on exchange proflie used FQDN.
the following is for components info regarding PI 7.1
=========================================================================================
sap.com SAP-XIAFC    1000.7.11.0.0.20081028231200 SAP AG
sap.com SAP_BUILDT 1000.7.11.0.0.20081028231700 SAP AG
sap.com SAP_XIAF      1000.7.11.0.0.20081209013800 SAP AG
sap.com SAP_XIESR    1000.7.11.0.0.20081209013800 SAP AG
sap.com SAP_XIGUI     1000.7.11.0.0.20081028231200 SAP AG
sap.com SAP_XITOOL 1000.7.11.0.0.20081209013800 SAP AG
thanks
bangbang

Hi,
Please clarify:
Are you getting this error in a freshly installed system or in the system which was working fine earlier?
Have you done any patching or upgaradationd recently?
Please refer to the sap notes below which may help to resolve your issue:
#1515991
#1452561
Regards,
Naveen.

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Error 500--Internal Server Error: java.lang.NoClassDefFoundError:

Dears
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     at com.kacst.common.filter.ErrorHandlerFilter.doFilter(Unknown Source)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:175)
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     at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119)
     at java.security.AccessController.doPrivileged(Native Method)
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     at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:139)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3730)
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     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
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     at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1490)
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Caused by: java.lang.ClassNotFoundException: com.sun.facelets.FaceletViewHandler
     at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:297)
     at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:270)
     at weblogic.utils.classloaders.ChangeAwareClassLoader.findClass(ChangeAwareClassLoader.java:64)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
     at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:179)
     at weblogic.utils.classloaders.ChangeAwareClassLoader.loadClass(ChangeAwareClassLoader.java:43)
     ... 58 more
Any body has faced a similar issue. Please let me know your views
Best regards
Mohamed Chargui

The JSF version packaged starting in 11.1.2.0.0 has been upgraded to 2.0.
Jdeveloper 11.1.1.6 support is JSF 1.2.
Upgrade to JDeveloper 11.1.2.0.0.
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*<exact-match>true</exact-match>*
</library-ref>
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Thanks
Jeff

Error: java.lang.NoClassDefFoundError: org/aspectj/lang/Signature

My applications run well before,
And after I remove org foleder: webapps\ROOT\WEB-INF\classes\org,
and later put it back again( I did that just for testing something)
Then I always get the error message:
java.lang.NoClassDefFoundError: org/aspectj/lang/Signature
Don't understand why, all the directory are exactlly same as before.
Ask your kindly help?

Have you restarted your server? Changes to the class directory normally require a restart.
Is the class org/aspectj/lang/Signature.class in that classes directory
Have you just updated your MySQL driver? It seems there was a recent problem with one of the distributions of the MySQL driver that it required the Aspectj classes in the classpath to run, when it shouldn't.

When get into ESR ,,error - java.lang.NoClassDefFoundError

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