Registry cannot be accessed if derby is used in winxp due to 
org.wso2.usermanager.UserManagerException: Null Realm not permitted 
---------------------------------------------------------------------------------------------------------------------------------

                 Key: REGISTRY-220
                 URL: http://wso2.org/jira/browse/REGISTRY-220
             Project: WSO2 Registry
          Issue Type: Bug
         Environment: derby-10.3.2.1, winxp, tomcat6, jdk15

            Reporter: Charitha Kankanamge
            Assignee: Chathura Ekanayake
            Priority: Blocker


I'm getting the following exception when accessing registry if the derby db is 
used.

[ERROR] 15 Could not check authentication.
Caused by Null Realm not permitted.
org.wso2.usermanager.UserManagerException: Null Realm not permitted.
        at org.wso2.usermanager.acl.realm.AuthorizingRealm.init(AuthorizingRealm
.java:104)
        at org.wso2.registry.secure.SecureRegistry.<init>(SecureRegistry.java:77
)
        at org.wso2.registry.web.actions.AbstractRegistryAction.getRegistry(Abst
ractRegistryAction.java:55)
        at org.wso2.registry.web.actions.ResourceDetailsAction.execute(ResourceD
etailsAction.java:86)
        at org.wso2.registry.web.ControllerServlet.forwardToResources(Controller
Servlet.java:784)
        at org.wso2.registry.web.ControllerServlet.doGet(ControllerServlet.java:
416)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:228)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:175)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:104)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:216)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:844)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ss(Http11Protocol.java:634)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44
5)
        at java.lang.Thread.run(Thread.java:595)
org.wso2.registry.RegistryException: Could not check authentication.
Caused by Null Realm not permitted.
        at org.wso2.registry.secure.SecureRegistry.<init>(SecureRegistry.java:91
)
        at org.wso2.registry.web.actions.AbstractRegistryAction.getRegistry(Abst
ractRegistryAction.java:55)
        at org.wso2.registry.web.actions.ResourceDetailsAction.execute(ResourceD
etailsAction.java:86)
        at org.wso2.registry.web.ControllerServlet.forwardToResources(Controller
Servlet.java:784)
        at org.wso2.registry.web.ControllerServlet.doGet(ControllerServlet.java:
416)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:228)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:175)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:104)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:216)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:844)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ss(Http11Protocol.java:634)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44
5)
        at java.lang.Thread.run(Thread.java:595)
Caused by: org.wso2.usermanager.UserManagerException: Null Realm not permitted.
        at org.wso2.usermanager.acl.realm.AuthorizingRealm.init(AuthorizingRealm
.java:104)
        at org.wso2.registry.secure.SecureRegistry.<init>(SecureRegistry.java:77
)
        ... 18 more
org.apache.jasper.JasperException: java.lang.NullPointerException
        at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspSer
vletWrapper.java:532)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:426)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
20)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDisp
atcher.java:687)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(Applica
tionDispatcher.java:469)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationD
ispatcher.java:403)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDis
patcher.java:301)
        at org.wso2.registry.web.ControllerServlet.forwardToResources(Controller
Servlet.java:821)
        at org.wso2.registry.web.ControllerServlet.doGet(ControllerServlet.java:
416)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:228)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:175)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:104)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:216)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:844)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ss(Http11Protocol.java:634)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44
5)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.NullPointerException
        at org.apache.jsp.admin.registry_002dresources_jsp._jspService(registry_
002dresources_jsp.java:110)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:384)
        ... 25 more

Steps to reproduce:
================
1. Follow the instructions given in the user guide
2. Issue the following url
http://localhost:8080/wso2registry

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