jdbc - java mysql connection link failure Connection refused -


When customers connect to their SSQL server, leave exceptions 

  last The packet server was 0 ms before. Sun.reflect.GeneratedConstructorAccessor112.newInstance (unknown source) at sun.reflect.DellegatingConstructorAccessorImpl.newInstance (DelegatingConstructorAccessorImpl.java:27) on java.lang.reflect.Constructor.newInstance (Constructor.Java / 1313) at com.mysql.jdbc. on Util.handleNewInstance com.mysql.jdbc.SQLError.createCommunicationsException (Util.java:406) (SQLError.java:1074) on com.mysql.jdbc.ConnectionImpl.createNewIO (ConnectionImpl.java:2103) on com.mysql. Jdbc.ConnectionImpl. & Lt; Init & gt; (ConnectionImpl.java:718) at com.mysql.jdbc.JDBC4Connection & Lt; Init & gt; Sun.reflect.GeneratedConstructorAccessor110.newInstance at (JDBC4Connection.java:46) (unknown source) on the sun. Reflect. Configure Com.mysql.jdbc.Util.handleNewInstance (Util.java:406) java.lang.reflect.Constructor.newInstance (Knstrctorkjawa) 13) on com.mysql on Constructor Setor Inplrknu instance (DelegatingConstructorAccessorImpl.java: 27) Deleting. On .jdbc.ConnectionImpl.getInstance (ConnectionImpl.java:302) ver.connect java.sql.DriverManager.getConnection (DriverManager.java:582) on com.mysql.jdbc.NonRegisteringDri (NonRegisteringDriver.java:282) org.logicalcobwebs. Org.logicalcobwebs.proxool.Prototyper.buildConnection (prototyper.) At org.logicalcobwebs.proxool.ConnectionPool.getConnection (ConnectionPool.java, June11) at proxool.DefaultConnectionBuilder.buildConnection at java.sql.DriverManager.getConnection (DriverManager.java154). Java: 159) at (DefaultConnectionBuilder.java39) org.logicalcobwebs.proxool.ProxoolDriver On java.sql.DriverManager.getConnection (DriverManager.java:207) on com.chinaren.tools.MysqlConnectionPools.getConnection connect java.sql.DriverManager.getConnection (DriverManager.java:582) (ProxoolDriver.java:89) (MysqlConnectionPools .java: 652) .......... Reason: java.net.ConnectException: Connection to java.net denied. Connect PlainSocketImpl.socketConnect (Basic Law) on Java.net.PlainSocketImpl.doCannect to (PlainSocketImpl.java: 333) on java.net.PlainSocketImpl.connectToAddress (PlainSocketImpl.java:195) on java.net. Java.net.Socket.connect on java.net.Socket.connect (Socket.javaitter25) on java.net.SocksSocketImpl.connect (SocksSocketImpl.java:366) PlainSocketImpl.connect (PlainSocketImpl.java:182) (Java.net Java.net.Socket. & Lt; init & gt; (socket.javaage1515) at & lt; init & gt; (Socket java: 372) on the com.mysql.jdbc.StandardSocketFactory .connect (StandardSocketFactory. java: 253) at com.mysql.jdbc.MysqlIO. & lt; init & gt; on com.mysql.jdbc.ConnectionImpl.createNewIO (MysqlIO.java:280) (ConnectionImpl.java:2026) ... 51 more < / Code>  
 1: Customer ping dbServer is OK. 2: Customer Telnet DB Server: Port is OK  
 The same code on my computer connection  
 Is there a problem of 8 hours?  
 What is the reason?   
 
  java.net.ConnectException: connection denied : The connection has been rejected, it is at low level and this means that the port is not open or the connection has been actively rejected by the firewall. Check whether the JDBC URL and / or datosaurus configuration actually use hostname / IP and port which should be used.  
 Is this also because the customer is actually pinging and telneting from the same computer running on this app?

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