Error page: Error occurred.

Exc: javax.servlet.jsp.JspTagException: javax.ejb.ObjectNotFoundException: Exception raised while finding bean with primary key: '6' in home: 'grade.Grade' java.sql.SQLException: Closed Connection at java.lang.Throwable.fillInStackTrace(Native Method) at java.lang.Throwable.fillInStackTrace(Compiled Code) at java.lang.Throwable.(Compiled Code) at java.lang.Exception.(Compiled Code) at java.sql.SQLException.(Compiled Code) at oracle.jdbc.driver.DatabaseError.throwSqlException(Compiled Code) at oracle.jdbc.driver.DatabaseError.throwSqlException(Compiled Code) at oracle.jdbc.driver.DatabaseError.throwSqlException(Compiled Code) at oracle.jdbc.driver.PhysicalConnection.prepareStatement(Compiled Code) at oracle.jdbc.driver.PhysicalConnection.prepareStatement(Compiled Code) at weblogic.jdbc20.pool.Connection.prepareStatement(Compiled Code) at com.hrw.hlla.ejb.grade.GradePSWebLogic_CMP_RDBMS.refreshByPrimaryKey(Compiled Code) at com.hrw.hlla.ejb.grade.GradePSWebLogic_CMP_RDBMS.loadByPrimaryKey(Compiled Code) at com.hrw.hlla.ejb.grade.GradePSWebLogic_CMP_RDBMS.findByPrimaryKey(Compiled Code) at com.hrw.hlla.ejb.grade.GradeBeanHomeImpl.findByPrimaryKey(Compiled Code) at com.hrw.hlla.ejb.grade.GradeBeanHomeImpl_ServiceStub.findByPrimaryKey(Compiled Code) at com.hrw.hlla.taglib.grade.GradeInfo.doStartTag(Compiled Code) at jsp_servlet._hlla.__toc._jspService(Compiled Code) at weblogic.servlet.jsp.JspBase.service(Compiled Code) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(Compiled Code) at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code) at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code) at weblogic.servlet.internal.ServletContextManager.invokeServlet(Compiled Code) at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code) at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code) at weblogic.kernel.ExecuteThread.run(Compiled Code)

Name: javax.ejb.ObjectNotFoundException: Exception raised while finding bean with primary key: '6' in home: 'grade.Grade' java.sql.SQLException: Closed Connection at java.lang.Throwable.fillInStackTrace(Native Method) at java.lang.Throwable.fillInStackTrace(Compiled Code) at java.lang.Throwable.(Compiled Code) at java.lang.Exception.(Compiled Code) at java.sql.SQLException.(Compiled Code) at oracle.jdbc.driver.DatabaseError.throwSqlException(Compiled Code) at oracle.jdbc.driver.DatabaseError.throwSqlException(Compiled Code) at oracle.jdbc.driver.DatabaseError.throwSqlException(Compiled Code) at oracle.jdbc.driver.PhysicalConnection.prepareStatement(Compiled Code) at oracle.jdbc.driver.PhysicalConnection.prepareStatement(Compiled Code) at weblogic.jdbc20.pool.Connection.prepareStatement(Compiled Code) at com.hrw.hlla.ejb.grade.GradePSWebLogic_CMP_RDBMS.refreshByPrimaryKey(Compiled Code) at com.hrw.hlla.ejb.grade.GradePSWebLogic_CMP_RDBMS.loadByPrimaryKey(Compiled Code) at com.hrw.hlla.ejb.grade.GradePSWebLogic_CMP_RDBMS.findByPrimaryKey(Compiled Code) at com.hrw.hlla.ejb.grade.GradeBeanHomeImpl.findByPrimaryKey(Compiled Code) at com.hrw.hlla.ejb.grade.GradeBeanHomeImpl_ServiceStub.findByPrimaryKey(Compiled Code) at com.hrw.hlla.taglib.grade.GradeInfo.doStartTag(Compiled Code) at jsp_servlet._hlla.__toc._jspService(Compiled Code) at weblogic.servlet.jsp.JspBase.service(Compiled Code) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(Compiled Code) at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code) at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code) at weblogic.servlet.internal.ServletContextManager.invokeServlet(Compiled Code) at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code) at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code) at weblogic.kernel.ExecuteThread.run(Compiled Code)

Stack Trace:
javax.servlet.jsp.JspTagException: javax.ejb.ObjectNotFoundException: Exception raised while finding bean with primary key: '6' in home: 'grade.Grade'
java.sql.SQLException: Closed Connection
	at java.lang.Throwable.fillInStackTrace(Native Method)
	at java.lang.Throwable.fillInStackTrace(Compiled Code)
	at java.lang.Throwable.(Compiled Code)
	at java.lang.Exception.(Compiled Code)
	at java.sql.SQLException.(Compiled Code)
	at oracle.jdbc.driver.DatabaseError.throwSqlException(Compiled Code)
	at oracle.jdbc.driver.DatabaseError.throwSqlException(Compiled Code)
	at oracle.jdbc.driver.DatabaseError.throwSqlException(Compiled Code)
	at oracle.jdbc.driver.PhysicalConnection.prepareStatement(Compiled Code)
	at oracle.jdbc.driver.PhysicalConnection.prepareStatement(Compiled Code)
	at weblogic.jdbc20.pool.Connection.prepareStatement(Compiled Code)
	at com.hrw.hlla.ejb.grade.GradePSWebLogic_CMP_RDBMS.refreshByPrimaryKey(Compiled Code)
	at com.hrw.hlla.ejb.grade.GradePSWebLogic_CMP_RDBMS.loadByPrimaryKey(Compiled Code)
	at com.hrw.hlla.ejb.grade.GradePSWebLogic_CMP_RDBMS.findByPrimaryKey(Compiled Code)
	at com.hrw.hlla.ejb.grade.GradeBeanHomeImpl.findByPrimaryKey(Compiled Code)
	at com.hrw.hlla.ejb.grade.GradeBeanHomeImpl_ServiceStub.findByPrimaryKey(Compiled Code)
	at com.hrw.hlla.taglib.grade.GradeInfo.doStartTag(Compiled Code)
	at jsp_servlet._hlla.__toc._jspService(Compiled Code)
	at weblogic.servlet.jsp.JspBase.service(Compiled Code)
	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(Compiled Code)
	at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
	at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
	at weblogic.servlet.internal.ServletContextManager.invokeServlet(Compiled Code)
	at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code)
	at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code)
	at weblogic.kernel.ExecuteThread.run(Compiled Code)

	at java.lang.Throwable.fillInStackTrace(Native Method)
	at java.lang.Throwable.fillInStackTrace(Compiled Code)
	at java.lang.Throwable.(Compiled Code)
	at java.lang.Exception.(Compiled Code)
	at javax.servlet.jsp.JspException.(Compiled Code)
	at javax.servlet.jsp.JspTagException.(Compiled Code)
	at com.hrw.hlla.taglib.grade.GradeInfo.doStartTag(Compiled Code)
	at jsp_servlet._hlla.__toc._jspService(Compiled Code)
	at weblogic.servlet.jsp.JspBase.service(Compiled Code)
	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(Compiled Code)
	at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
	at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
	at weblogic.servlet.internal.ServletContextManager.invokeServlet(Compiled Code)
	at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code)
	at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code)
	at weblogic.kernel.ExecuteThread.run(Compiled Code)