2058021 - 503 Service Unavailable on java pages

• Java pages like /nwa, /irj/portal, /index.html  not accessible.
• Accessing these page show the error:"503   Service Unavailable" Error: Application cannot be started.
• std_server0.out log from java work directory (/usr/sap/<SID>/<instance>/work) has the entries:

  Service [tc~je~webservices~srv] start ================= ERROR =================

  CSN Component [BC-ESI-WS-JAV-RT], DC Name [sap.com/tc~je~webservices~srv]

  java.lang.NoClassDefFoundError: com/sap/engine/services/webservices/espbase/client/dsr/DSRFacade

  at java.lang.Class.forName0(Native Method)

  at java.lang.Class.forName(Class.java:249)

  Caused by: java.lang.ClassNotFoundException: com.sap.engine.services.webservices.espbase.client.dsr.DSRFacade

    SAP Netweaver 7.1X and above.

java.lang.NoClassDefFoundError,Java Virtual Machine , SAPJVM,ENGINEAPI ,netweaver,netweaver java,slow, page not found, cannot connect,deployment, patching,DSRFacade,503   Service Unavailable,tc~je~webservices~srv , KBA , BC-JAS-COR , Enterprise Runtime, Core J2EE Framework , BC-JAS-SF , Startup Framework , BC-ESI-WS-JAV-RT , Runtime , Problem