type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception javax.servlet.ServletException: javax.servlet.jsp.JspException: java.lang.RuntimeException: blackboard.persist.PersistenceException: Unable to retrieve a database connection. org.apache.jasper.runtime.PageContextImpl.doHandle PageException(PageContextImpl.java:858) org.apache.jasper.runtime.PageContextImpl.access$1 100(PageContextImpl.java:71) org.apache.jasper.runtime.PageContextImpl$12.run(P ageContextImpl.java:778) java.security.AccessController.doPrivileged(Native Method) org.apache.jasper.runtime.PageContextImpl.handlePa geException(PageContextImpl.java:776) blackboard.web.error_005freceipt_jsp._jspService(e rror_005freceipt_jsp.java:176) org.apache.jasper.runtime.HttpJspBase.service(Http JspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet .java:717) sun.reflect.GeneratedMethodAccessor263.invoke(Unkn own Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.apache.catalina.security.SecurityUtil$1.run(Se curityUtil.java:269) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject .java:517) org.apache.catalina.security.SecurityUtil.execute( SecurityUtil.java:301) org.apache.catalina.security.SecurityUtil.doAsPriv ilege(SecurityUtil.java:162) java.security.AccessController.doPrivileged(Native Method) java.security.AccessController.doPrivileged(Native Method) org.apache.jasper.runtime.PageContextImpl.doForwar d(PageContextImpl.java:706) org.apache.jasper.runtime.PageContextImpl.access$1 000(PageContextImpl.java:71) org.apache.jasper.runtime.PageContextImpl$11.run(P ageContextImpl.java:664) java.security.AccessController.doPrivileged(Native Method) org.apache.jasper.runtime.PageContextImpl.forward( PageContextImpl.java:662) org.apache.jasper.runtime.PageContextImpl.doHandle PageException(PageContextImpl.java:818) org.apache.jasper.runtime.PageContextImpl.access$1 100(PageContextImpl.java:71) org.apache.jasper.runtime.PageContextImpl$12.run(P ageContextImpl.java:778) java.security.AccessController.doPrivileged(Native Method) org.apache.jasper.runtime.PageContextImpl.handlePa geException(PageContextImpl.java:776) blackboard.web.frameset_jsp._jspService(frameset_j sp.java:323) org.apache.jasper.runtime.HttpJspBase.service(Http JspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet .java:717) sun.reflect.GeneratedMethodAccessor263.invoke(Unkn own Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.apache.catalina.security.SecurityUtil$1.run(Se curityUtil.java:269) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject .java:517) org.apache.catalina.security.SecurityUtil.execute( SecurityUtil.java:301) org.apache.catalina.security.SecurityUtil.doAsPriv ilege(SecurityUtil.java:162) java.security.AccessController.doPrivileged(Native Method) blackboard.platform.servlet.B2ContextFilter.doFilt er(B2ContextFilter.java:100) sun.reflect.GeneratedMethodAccessor269.invoke(Unkn own Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.apache.catalina.security.SecurityUtil$1.run(Se curityUtil.java:269) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject .java:517) org.apache.catalina.security.SecurityUtil.execute( SecurityUtil.java:301) org.apache.catalina.security.SecurityUtil.doAsPriv ilege(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) blackboard.platform.servlet.ContentTypeFilter.doFi lter(ContentTypeFilter.java:57) sun.reflect.GeneratedMethodAccessor268.invoke(Unkn own Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.apache.catalina.security.SecurityUtil$1.run(Se curityUtil.java:269) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject .java:517) org.apache.catalina.security.SecurityUtil.execute( SecurityUtil.java:301) org.apache.catalina.security.SecurityUtil.doAsPriv ilege(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) blackboard.platform.servlet.XssServletFilter.doFil ter(XssServletFilter.java:138) sun.reflect.GeneratedMethodAccessor267.invoke(Unkn own Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.apache.catalina.security.SecurityUtil$1.run(Se curityUtil.java:269) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject .java:517) org.apache.catalina.security.SecurityUtil.execute( SecurityUtil.java:301) org.apache.catalina.security.SecurityUtil.doAsPriv ilege(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) blackboard.platform.servlet.RequestSessionFilter.d oFilter(RequestSessionFilter.java:181) sun.reflect.GeneratedMethodAccessor266.invoke(Unkn own Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.apache.catalina.security.SecurityUtil$1.run(Se curityUtil.java:269) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject .java:517) org.apache.catalina.security.SecurityUtil.execute( SecurityUtil.java:301) org.apache.catalina.security.SecurityUtil.doAsPriv ilege(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) blackboard.platform.servlet.SSLProxyFilter.doFilte r(SSLProxyFilter.java:39) sun.reflect.GeneratedMethodAccessor265.invoke(Unkn own Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.apache.catalina.security.SecurityUtil$1.run(Se curityUtil.java:269) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject .java:517) org.apache.catalina.security.SecurityUtil.execute( SecurityUtil.java:301) org.apache.catalina.security.SecurityUtil.doAsPriv ilege(SecurityUtil.java:243)كل ماأدخل على البلاك بورد يطلع كذا ولايفتح معي ماهو الحل