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POGot an exception com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException on GoogleAppEngine
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  1. POGot an exception com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException on GoogleAppEngine
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    copied!<p>I am using GoogleAppEngine as my server.I have written a simple jdbc application on struts framework(using sql as my database). But don't know why i am not able to run it properly. Here is the exception that i got...</p> <pre><code> com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Here is the full error log that i got [java] com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. [java] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [java] at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) [java] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) [java] at java.lang.reflect.Constructor.newInstance(Unknown Source) [java] at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:116) [java] at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:124) [java] at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) [java] at com.mysql.jdbc.Util.getInstance(Util.java:386) [java] at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1013) [java] at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987) [java] at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982) [java] at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927) [java] at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2412) [java] at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2154) [java] at com.mysql.jdbc.ConnectionImpl.&lt;init&gt;(ConnectionImpl.java:792) [java] at com.mysql.jdbc.JDBC4Connection.&lt;init&gt;(JDBC4Connection.java:47) [java] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [java] at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) [java] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) [java] at java.lang.reflect.Constructor.newInstance(Unknown Source) [java] at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:116) [java] at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:124) [java] at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) [java] at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:381) [java] at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305) [java] at java.sql.DriverManager.getConnection(Unknown Source) [java] at java.sql.DriverManager.getConnection(Unknown Source) [java] at com.cac.struts.InsertMethod.&lt;init&gt;(InsertMethod.java:19) [java] at com.cac.struts.InsertAction.execute(InsertAction.java:23) [java] at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425) [java] at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228) [java] at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) [java] at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449) [java] at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) [java] at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) [java] at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) [java] at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) [java] at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:60) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) [java] at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) [java] at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) [java] at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) [java] at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) [java] at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) [java] at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) [java] at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) [java] at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) [java] at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:78) [java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) [java] at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:363) [java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) [java] at org.mortbay.jetty.Server.handle(Server.java:326) [java] at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) [java] at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) [java] at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) [java] at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) [java] at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) [java] at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) [java] at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) [java] Caused by: java.security.AccessControlException: access denied (java.net.SocketPermission localhost resolve) [java] at java.security.AccessControlContext.checkPermission(Unknown Source) [java] at java.security.AccessController.checkPermission(Unknown Source) [java] at java.lang.SecurityManager.checkPermission(Unknown Source) [java] at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:252) [java] at java.lang.SecurityManager.checkConnect(Unknown Source) [java] at java.net.InetAddress.getAllByName0(Unknown Source) [java] at java.net.InetAddress.getAllByName0(Unknown Source) [java] at java.net.InetAddress.getAllByName(Unknown Source) [java] at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:247) [java] at com.mysql.jdbc.MysqlIO.&lt;init&gt;(MysqlIO.java:294) [java] at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2333) [java] at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2370) [java] ... 51 more [java] java.lang.NullPointerException [java] at com.cac.struts.InsertMethod.insert(InsertMethod.java:33) [java] at com.cac.struts.InsertAction.execute(InsertAction.java:24) [java] at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425) [java] at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228) [java] at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) [java] at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449) [java] at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) [java] at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) [java] at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) [java] at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) [java] at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:60) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) [java] at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) [java] at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) [java] at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97) [java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) [java] at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) [java] at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) [java] at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) [java] at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) [java] at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) [java] at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:78) [java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) [java] at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:363) [java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) [java] at org.mortbay.jetty.Server.handle(Server.java:326) [java] at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) [java] at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) [java] at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) [java] at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) [java] at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) [java] at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) [java] at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) </code></pre> <p>Here is the Model class code that i have tried</p> <pre><code>package com.cac.struts; import java.sql.*; /** * * @author hablu */ public class InsertMethod { Connection con=null; public InsertMethod() { try { Class.forName("com.mysql.jdbc.Driver"); con=DriverManager.getConnection("jdbc:mysql://localhost/test","root",""); //Class.forName("oracle.jdbc.driver.OracleDriver"); //con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","system","system"); } catch(Exception e) { e.printStackTrace(); } } public boolean insert(int regd) { boolean b=false; try { PreparedStatement ps=con.prepareStatement("select * from student where regd=?"); ps.setInt(1,regd); ResultSet rs=ps.executeQuery(); while(rs.next()) { b=true; System.out.println("....."+rs.getString(1)); } } catch(Exception e) { e.printStackTrace(); } return b; } } </code></pre>
 

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