يظهر لي لما ابي افتح البلاك بورد ايش الحل HTTP Status 500 - 
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type Exception report
message 
de************************ion The server encountered an internal error () that prevented it from fulfilling this request.
exception 
javax.servlet.ServletException: javax.servlet.jsp.JspException: blackboard.platform.branding.BrandingException: Cant get branding by host name and user
	org.apache.jasper.runtime.PageCon****************I  mpl.doHandlePageException(PageCon****************I  mpl.java:848)
	org.apache.jasper.runtime.PageCon****************I  mpl.access$1100(PageCon****************Impl.java:7  1)
	org.apache.jasper.runtime.PageCon****************I  mpl$12.run(PageCon****************Impl.java:768)
	java.security.AccessController.doPrivileged(Native Method)
	org.apache.jasper.runtime.PageCon****************I  mpl.handlePageException(PageCon****************Imp  l.java:766)
	blackboard.web.error_jsp._jspService(error_jsp.jav  a:117)
	org.apache.jasper.runtime.HttpJspBase.service(Http  JspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet  .java:717)
	sun.reflect.GeneratedMethodAccessor899.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:162)
	java.security.AccessController.doPrivileged(Native Method)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.webapps.login.servlet.LoginBrokerServle  t.service(LoginBrokerServlet.java:183)
	javax.servlet.http.HttpServlet.service(HttpServlet  .java:717)
	sun.reflect.GeneratedMethodAccessor227.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:162)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.cms.xythos.XythosCon****************Fil  ter.doFilter(XythosCon****************Filter.java:  53)
	sun.reflect.GeneratedMethodAccessor230.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:218)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.platform.servlet.**********************  ******TypeFilter.doFilter(************************  ****TypeFilter.java:56)
	sun.reflect.GeneratedMethodAccessor229.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:218)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.platform.servlet.RequestSessionFilter.h  andleRequest(RequestSessionFilter.java:412)
	blackboard.platform.servlet.RequestSessionFilter.d  oFilter(RequestSessionFilter.java:195)
	sun.reflect.GeneratedMethodAccessor228.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:218)
root cause 
blackboard.platform.branding.BrandingException: Cant get branding by host name and user
	blackboard.platform.branding.impl.BrandingManagerI  mpl.getBrandingByHostNameAndUser(BrandingManagerIm  pl.java:251)
	sun.reflect.GeneratedMethodAccessor256.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	blackboard.db.TransactionInterfaceFactory$Transact  ionHandler$1.run(TransactionInterfaceFactory.java:  73)
	blackboard.db.ConnectionManager.performTransaction  (ConnectionManager.java:296)
	blackboard.db.TransactionInterfaceFactory$Transact  ionHandler.invoke(TransactionInterfaceFactory.java  :89)
	$Proxy32.getBrandingByHostNameAndUser(Unknown Source)
	blackboard.servlet.tags.ngui.BasePageTag.getCssFil  es(BasePageTag.java:232)
	blackboard.servlet.tags.ngui.BasePageTag$1.run(Bas  ePageTag.java:166)
	blackboard.servlet.tags.ngui.BasePageTag$1.run(Bas  ePageTag.java:164)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.servlet.tags.ngui.BasePageTag.doStartTa  g(BasePageTag.java:163)
	blackboard.web.error_jsp._jspService(error_jsp.jav  a:76)
	org.apache.jasper.runtime.HttpJspBase.service(Http  JspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet  .java:717)
	sun.reflect.GeneratedMethodAccessor899.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:162)
	java.security.AccessController.doPrivileged(Native Method)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.webapps.login.servlet.LoginBrokerServle  t.service(LoginBrokerServlet.java:183)
	javax.servlet.http.HttpServlet.service(HttpServlet  .java:717)
	sun.reflect.GeneratedMethodAccessor227.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:162)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.cms.xythos.XythosCon****************Fil  ter.doFilter(XythosCon****************Filter.java:  53)
	sun.reflect.GeneratedMethodAccessor230.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:218)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.platform.servlet.**********************  ******TypeFilter.doFilter(************************  ****TypeFilter.java:56)
	sun.reflect.GeneratedMethodAccessor229.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:218)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.platform.servlet.RequestSessionFilter.h  andleRequest(RequestSessionFilter.java:412)
	blackboard.platform.servlet.RequestSessionFilter.d  oFilter(RequestSessionFilter.java:195)
	sun.reflect.GeneratedMethodAccessor228.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:218)
root cause 
blackboard.persist.KeyNotFoundException: لم يتم العثور على الكائن المحدد.
	blackboard.persist.impl.NewBaseDbLoader.loadObject  (NewBaseDbLoader.java:139)
	blackboard.persist.role.impl.PortalRoleDbLoaderImp  l.loadPrimaryRoleByUserId(PortalRoleDbLoaderImpl.j  ava:460)
	blackboard.persist.role.impl.PortalRoleDbLoaderImp  l.loadPrimaryRoleByUserId(PortalRoleDbLoaderImpl.j  ava:451)
	blackboard.platform.branding.impl.BrandingManagerI  mpl.getBrandingByHostNameAndUser(BrandingManagerIm  pl.java:245)
	sun.reflect.GeneratedMethodAccessor256.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	blackboard.db.TransactionInterfaceFactory$Transact  ionHandler$1.run(TransactionInterfaceFactory.java:  73)
	blackboard.db.ConnectionManager.performTransaction  (ConnectionManager.java:296)
	blackboard.db.TransactionInterfaceFactory$Transact  ionHandler.invoke(TransactionInterfaceFactory.java  :89)
	$Proxy32.getBrandingByHostNameAndUser(Unknown Source)
	blackboard.servlet.tags.ngui.BasePageTag.getCssFil  es(BasePageTag.java:232)
	blackboard.servlet.tags.ngui.BasePageTag$1.run(Bas  ePageTag.java:166)
	blackboard.servlet.tags.ngui.BasePageTag$1.run(Bas  ePageTag.java:164)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.servlet.tags.ngui.BasePageTag.doStartTa  g(BasePageTag.java:163)
	blackboard.web.error_jsp._jspService(error_jsp.jav  a:76)
	org.apache.jasper.runtime.HttpJspBase.service(Http  JspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet  .java:717)
	sun.reflect.GeneratedMethodAccessor899.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:162)
	java.security.AccessController.doPrivileged(Native Method)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.webapps.login.servlet.LoginBrokerServle  t.service(LoginBrokerServlet.java:183)
	javax.servlet.http.HttpServlet.service(HttpServlet  .java:717)
	sun.reflect.GeneratedMethodAccessor227.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:162)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.cms.xythos.XythosCon****************Fil  ter.doFilter(XythosCon****************Filter.java:  53)
	sun.reflect.GeneratedMethodAccessor230.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:218)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.platform.servlet.**********************  ******TypeFilter.doFilter(************************  ****TypeFilter.java:56)
	sun.reflect.GeneratedMethodAccessor229.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:218)
	java.security.AccessController.doPrivileged(Native Method)
	blackboard.platform.servlet.RequestSessionFilter.h  andleRequest(RequestSessionFilter.java:412)
	blackboard.platform.servlet.RequestSessionFilter.d  oFilter(RequestSessionFilter.java:195)
	sun.reflect.GeneratedMethodAccessor228.invoke(Unkn  own Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(De  legatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:585)
	org.apache.catalina.security.SecurityUtil$1.run(Se  curityUtil.java:244)
	java.security.AccessController.doPrivileged(Native Method)
	javax.security.auth.Subject.doAsPrivileged(Subject  .java:517)
	org.apache.catalina.security.SecurityUtil.execute(  SecurityUtil.java:276)
	org.apache.catalina.security.SecurityUtil.doAsPriv  ilege(SecurityUtil.java:218)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.18 logs.
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Apache Tomcat/6.0.18