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    Make sure you are using InnoDB storage engine and READ-COMMITTED transaction isolation level and increase the database server innodb_lock_wait_timeout variable to about 500.

Solutions on the web

via Stack Overflow by Syed Mainul Hasan
, 1 year ago
null, message from server: "Host '103.253.39.4' is not allowed to connect to this MySQL server"
via Stack Overflow by khalil
, 1 year ago
null, message from server: "Le h?te 'khalil.home' n'est pas authoris? ? se connecter ? ce serveur MySQL"
via Stack Overflow by prolink007
, 1 year ago
null, message from server: "Host '192.168.1.102' is not allowed to connect to this MySQL server"
via Stack Overflow by applebrown
, 1 year ago
null, message from server: "Host 'xxx.fuchs.com' is not allowed to connect to this MySQL server"
via Stack Overflow by pier92
, 1 year ago
null, message from server: "Host '172.17.0.9' is not allowed to connect to this MySQL server"
java.sql.SQLException: null, message from server: "Host '103.253.39.4' is not allowed to connect to this MySQL server" at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:998) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:937) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926) at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1037) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2239) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2270) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2069) at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:794) at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:408) at com.mysql.jdbc.Util.handleNewInstance(Util.java:389) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325) at java.sql.DriverManager.getConnection(DriverManager.java:664) at java.sql.DriverManager.getConnection(DriverManager.java:270) at com.garciaPlumbing.model.DatabaseManager.connect(DatabaseManager.java:38) at com.garciaPlumbing.model.FittingDetails.getAllSuppliers(FittingDetails.java:155) at com.garciaPlumbing.view.Layout_AddFittingType.<init>(Layout_AddFittingType.java:52) at com.garciaPlumbing.view.Layout_InsertFittingDetails.<init>(Layout_InsertFittingDetails.java:37) at com.garciaPlumbing.view.MenuItemTask.<init>(MenuItemTask.java:23) at com.garciaPlumbing.view.BasicLayout.<init>(BasicLayout.java:40) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:340) at com.sun.javafx.application.LauncherImpl.lambda$launchApplicationWithArgs$148(LauncherImpl.java:327)