2972117 - 500 Internal Server Error while opening AS Java UserAdmin Page

•  500 Internal server error while accessing AS Java useradmin page or the PI Monitoring (PIMON) page.
•  All other AS Java URL work fine.
•  In default Traces (location: /usr/sap/<SID>/<instance>/j2ee/cluster/serverX/log), It can be observed: 

  500 Internal Server Error is returned for HTTP request [http(s)://<host:port>/webdynpro/resources/sap.com/tc~sec~ume~wd~umeadmin/UmeAdminApp]:

  [EXCEPTION]
  java.lang.NoClassDefFoundError: com/ibm/icu/impl/ICUDebug : cannot initialize class because prior initialization attempt failed....

  ....caused by: java.lang.IllegalArgumentException: Invalid version number: Version number may be negative or greater than 255

  OR
  

  500 Internal Server Error is returned for HTTP request [http(s)://<host:port>/webdynpro/resources/sap.com/tc~sec~ume~wd~umeadmin/UmeAdminApp]:
    component [forwardServlet],
    web module [webdynpro/resources/sap.com/tc~sec~ume~wd~umeadmin],
    application [sap.com/tc~sec~ume~wd~umeadmin],
    DC name [],
    CSN component[],
    problem categorization [],
    internal categorization [1083609780].

  [EXCEPTION]
  java.lang.NoClassDefFoundError: Could not initialize class com.ibm.icu.text.Collator
    at com.sap.i18n.text.I18nStringComparator.<init>(I18nStringComparator.java:78)
    at com.sap.security.core.wd.umeuifactory.NodeElementByAttributeComparator.<init>(NodeElementByAttributeComparator.java:59)

  Caused by: java.lang.ExceptionInInitializerError: Exception java.lang.NoClassDefFoundError: Could not initialize class com.ibm.icu.impl.ICUDebug [in thread "HTTP Worker [@73201101]"]
    at com.ibm.icu.text.Collator.<clinit>(Collator.java:946)
  
  

• In std_serverX.out(location:/usr/sap/<SID>/<instance>/work), One may notice : 

  java.lang.ExceptionInInitializerError
    at com.ibm.icu.impl.NormalizerDataReader.<clinit>(NormalizerDataReader.java:300)
    at com.ibm.icu.impl.NormalizerImpl.<init>(NormalizerImpl.java:288)
    at com.ibm.icu.impl.NormalizerImpl.<clinit>(NormalizerImpl.java:35)

SAP NetWeaver Application Server Java

UDDI, JVM, IllegalArgumentException: , Invalid version number:,  Version number may be negative or greater than 255, negative, grater, 255, version number, SUM, SOLMAN, upgrade, deploy, deployment, cannot initialize class because prior initialization attempt failed, UME, 500 Internal Server Error , KBA , BC-JAS-SEC , Security, User Management , Problem