What causes Error Loading Library vfszip when using JSF2 in EAP5 ?

Issue

• We have been receiving the following errors in one of the JBoss node. We have compared deployment in both the nodes. They seems identical except the JSF library changes. We couldn't find the solution.
• In start_up log we are seeing the following errors :

SEVERE: Error Loading Library: vfszip:/home/jboss/jboss-eap-5.0/jboss-as/server/testProfile3/deploy/jbossweb.sar/jsf-libs/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/html_basic.taglib.xml
java.io.IOException: Error parsing [vfszip:/home/jboss/jboss-eap-5.0/jboss-as/server/testProfile3/deploy/jbossweb.sar/jsf-libs/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/html_basic.taglib.xml]:
Caused by: org.xml.sax.SAXException: Error Handling [vfszip:/home/jboss/jboss-eap-5.0/jboss-as/server/testProfile3/deploy/jbossweb.sar/jsf-libs/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/html_basic.taglib.xml@40,31]

SEVERE: Error Loading Library: vfszip:/home/jboss/jboss-eap-5.0/jboss-as/server/testProfile3/deploy/jbossweb.sar/jsf-libs/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-core.taglib.xml
java.io.IOException: Error parsing [vfszip:/home/jboss/jboss-eap-5.0/jboss-as/server/testProfile3/deploy/jbossweb.sar/jsf-libs/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-core.taglib.xml]:
Caused by: org.xml.sax.SAXException: Error Handling [vfszip:/home/jboss/jboss-eap-5.0/jboss-as/server/testProfile3/deploy/jbossweb.sar/jsf-libs/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-core.taglib.xml@41,31]

SEVERE: Error Loading Library: vfszip:/home/jboss/jboss-eap-5.0/jboss-as/server/testProfile3/deploy/jbossweb.sar/jsf-libs/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-fn.taglib.xml
java.io.IOException: Error parsing [vfszip:/home/jboss/jboss-eap-5.0/jboss-as/server/testProfile3/deploy/jbossweb.sar/jsf-libs/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-fn.taglib.xml]:
Caused by: org.xml.sax.SAXException: Error Handling [vfszip:/home/jboss/jboss-eap-5.0/jboss-as/server/testProfile3/deploy/jbossweb.sar/jsf-libs/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-fn.taglib.xml@41,31]
.
.
SEVERE: Error Loading Library: vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/html_basic.taglib.xml
java.io.IOException: Error parsing [vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/html_basic.taglib.xml]:
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
Caused by: org.xml.sax.SAXException: Error Handling [vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/html_basic.taglib.xml@40,31]
        at com.sun.facelets.compiler.TagLibraryConfig$LibraryHandler.error(TagLibraryConfig.java:376)
        at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
SEVERE: Error Loading Library: vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-core.taglib.xml
java.io.IOException: Error parsing [vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-core.taglib.xml]:
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
Caused by: org.xml.sax.SAXException: Error Handling [vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-core.taglib.xml@41,31]
        at com.sun.facelets.compiler.TagLibraryConfig$LibraryHandler.error(TagLibraryConfig.java:376)
        at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
SEVERE: Error Loading Library: vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-fn.taglib.xml
java.io.IOException: Error parsing [vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-fn.taglib.xml]:
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
Caused by: org.xml.sax.SAXException: Error Handling [vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/jstl-fn.taglib.xml@41,31]
        at com.sun.facelets.compiler.TagLibraryConfig$LibraryHandler.error(TagLibraryConfig.java:376)
        at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
SEVERE: Error Loading Library: vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/ui.taglib.xml
java.io.IOException: Error parsing [vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/ui.taglib.xml]:
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
Caused by: org.xml.sax.SAXException: Error Handling [vfszip:/PATH/TO/deploy/TestApp.ear/lib/jsf-impl-2.0.jar/com/sun/faces/metadata/taglib/ui.taglib.xml@41,31]
        at com.sun.facelets.compiler.TagLibraryConfig$LibraryHandler.error(TagLibraryConfig.java:376)
        at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

• We sometimes get the following error as well including the above:

ERROR : When we are clicking the button "Research" getting following error Message :
System Error
The following system error occurred when processing your request:
java.lang.NullPointerException