about javamail
can anyone tell me what is the meaning of following error
/takeaction.dqlhalfleave= 0.5 Error Message: Operation not allowed after ResultSet closed Cause: null Error code: 0 Error state: S1000 java.sql.SQLException: Operation not allowed after ResultSet closed Error Message: Error during query: Unexpected Exception: java.lang.NullPointerException message given: null Nested Stack Trace: ** BEGIN NESTED EXCEPTION ** java.lang.NullPointerException STACKTRACE: java.lang.NullPointerException at com.mysql.jdbc.ResultSet.buildIndexMapping(ResultSet.java:611) at com.mysql.jdbc.ResultSet.findColumn(ResultSet.java:931) at com.mysql.jdbc.ResultSet.getString(ResultSet.java:5447) at com.mysql.jdbc.DatabaseMetaData$7.forEach(DatabaseMetaData.java:3474) at com.mysql.jdbc.DatabaseMetaData$IterateBlock.doForAll(DatabaseMetaData.java:76) at com.mysql.jdbc.DatabaseMetaData.getPrimaryKeys(DatabaseMetaData.java:3452) at com.mysql.jdbc.UpdatableResultSet.checkUpdatability(UpdatableResultSet.java:342) at com.mysql.jdbc.UpdatableResultSet.(UpdatableResultSet.java:134) at com.mysql.jdbc.MysqlIO.buildResultSetWithRows(MysqlIO.java:2001) at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:447) at com.mysql.jdbc.MysqlIO.readResultsForQueryOrUpdate(MysqlIO.java:1970) at com.mysql.jdbc.MysqlIO.readAllResults(MysqlIO.java:1387) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1727) at com.mysql.jdbc.Connection.execSQL(Connection.java:3118) at com.mysql.jdbc.Connection.execSQL(Connection.java:3047) at com.mysql.jdbc.Statement.executeQuery(Statement.java:1166) at leave.requesthandlers.ProcessAssignmentRequestHandler.processRequest(ProcessAssignmentRequestHandler.java:160) at leave.web.controller.RequestController.doPost(RequestController.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:212) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445) at java.lang.Thread.run(Unknown Source) ** END NESTED EXCEPTION ** Cause: null Error code: 0 Error state: S1000 java.sql.SQLException: Error during query: Unexpected Exception: java.lang.NullPointerException message given: null Nested Stack Trace: ** BEGIN NESTED EXCEPTION ** java.lang.NullPointerException STACKTRACE: java.lang.NullPointerException at com.mysql.jdbc.ResultSet.buildIndexMapping(ResultSet.java:611) at com.mysql.jdbc.ResultSet.findColumn(ResultSet.java:931) at com.mysql.jdbc.ResultSet.getString(ResultSet.java:5447) at com.mysql.jdbc.DatabaseMetaData$7.forEach(DatabaseMetaData.java:3474) at com.mysql.jdbc.DatabaseMetaData$IterateBlock.doForAll(DatabaseMetaData.java:76) at com.mysql.jdbc.DatabaseMetaData.getPrimaryKeys(DatabaseMetaData.java:3452) at com.mysql.jdbc.UpdatableResultSet.checkUpdatability(UpdatableResultSet.java:342) at com.mysql.jdbc.UpdatableResultSet.(UpdatableResultSet.java:134) at com.mysql.jdbc.MysqlIO.buildResultSetWithRows(MysqlIO.java:2001) at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:447) at com.mysql.jdbc.MysqlIO.readResultsForQueryOrUpdate(MysqlIO.java:1970) at com.mysql.jdbc.MysqlIO.readAllResults(MysqlIO.java:1387) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1727) at com.mysql.jdbc.Connection.execSQL(Connection.java:3118) at com.mysql.jdbc.Connection.execSQL(Connection.java:3047) at com.mysql.jdbc.Statement.executeQuery(Statement.java:1166) at leave.requesthandlers.ProcessAssignmentRequestHandler.processRequest(ProcessAssignmentRequestHandler.java:160) at leave.web.controller.RequestController.doPost(RequestController.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:212) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445) at java.lang.Thread.run(Unknown Source) ** END NESTED EXCEPTION **
"Actually i have sending mail so i have created one javamail related class its successfully compiled and i have tested it also so this class i am calling in my servlet handler so in this servelet i have getting 4 parameter and passing in that class please help me if anyone knows about that error
thanks
