Jdeveloper unable to create BPEL IS Connection - Identity Service Configuration error

Sometimes we get this wierd error while creating an BPEL Integration Server Connection on JDev -

java.lang.Exception:Exception not handled by the Collaxa Cube system.
An unhandled exception has been thrown in the Collaxa Cube system. The exception reported is: "ORABPEL-10555

Identity Service Configuration error.
Identity Service Configuration file has error.

at oracle.tip.pc.services.identity.config.ISConfiguration.load(ISConfiguration.java:245)
at oracle.tip.pc.services.identity.config.ISConfiguration.(ISConfiguration.java:88)
at oracle.tip.pc.services.identity.config.ISConfigurationService.getDefaultRealmName(ISConfigurationService.java:82)
at oracle.tip.pc.services.common.ServiceFactory.getAuthenticationServiceInstance(ServiceFactory.java:158)
at oracle.bpel.services.connection.BPELConnection.returnsIdentityServiceStatus(BPELConnection.java:262)
at oracle.bpel.services.connection.BPELConnection.doPost(BPELConnection.java:139)
at oracle.bpel.services.connection.BPELConnection.doGet(BPELConnection.java:88)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
at oracle.security.jazn.oc4j.JAZNFilter$1.run(JAZNFilter.java:396)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:410)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:623)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370)
at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453)
at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:302)
at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:190)
at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
at java.lang.Thread.run(Thread.java:595)
Caused by: oracle.xml.parser.v2.XMLParseException: Start of root element expected.
at oracle.xml.parser.v2.XMLError.flushErrors1(XMLError.java:320)
at oracle.xml.parser.v2.NonValidatingParser.parseRootElement(NonValidatingParser.java:341)
at oracle.xml.parser.v2.NonValidatingParser.parseDocument(NonValidatingParser.java:303)
at oracle.xml.parser.v2.XMLParser.parse(XMLParser.java:291)
at oracle.tip.pc.services.identity.config.ISConfiguration.parseDocument(ISConfiguration.java:320)
at oracle.tip.pc.services.identity.config.ISConfiguration.load(ISConfiguration.java:240)
... 22 more


This generally occurs because of a corrupt file namd "is_config.xml". The file can be found at $ORACLE_HOME/bpel/system/services/config

Solution - All u need to do is restore the original file from your backup and then bounce the oc4j container hosting the BPEL services.