Openfire configuration error

=============== Problem description ====================

Errors always occur:



A connection to the database cocould not be made. view the error message by opening the "\ logs \ error. log" log file, then go back to fix the problem.



I checked error. log:

2013.09.26 11:40:03 org.jivesoftware.util.log.util.CommonsLogFactory - Prototypecom.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.net.UnknownHostExceptionMESSAGE: [host-name]STACKTRACE:java.net.UnknownHostException: [host-name]        at java.net.InetAddress.getAllByName(Unknown Source)        at java.net.InetAddress.getAllByName(Unknown Source)        at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:246)        at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:271)        at com.mysql.jdbc.Connection.createNewIO(Connection.java:2771)        at com.mysql.jdbc.Connection.<init>(Connection.java:1555)        at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)        at java.sql.DriverManager.getConnection(Unknown Source)        at java.sql.DriverManager.getConnection(Unknown Source)        at org.logicalcobwebs.proxool.DefaultConnectionBuilder.buildConnection(DefaultConnectionBuilder.java:39)        at org.logicalcobwebs.proxool.Prototyper.buildConnection(Prototyper.java:159)        at org.logicalcobwebs.proxool.Prototyper.sweep(Prototyper.java:102)        at org.logicalcobwebs.proxool.PrototyperThread.run(PrototyperThread.java:44)** END NESTED EXCEPTION **Last packet sent to the server was 0 ms ago.        at com.mysql.jdbc.Connection.createNewIO(Connection.java:2847)        at com.mysql.jdbc.Connection.<init>(Connection.java:1555)        at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)        at java.sql.DriverManager.getConnection(Unknown Source)        at java.sql.DriverManager.getConnection(Unknown Source)        at org.logicalcobwebs.proxool.DefaultConnectionBuilder.buildConnection(DefaultConnectionBuilder.java:39)        at org.logicalcobwebs.proxool.Prototyper.buildConnection(Prototyper.java:159)        at org.logicalcobwebs.proxool.Prototyper.sweep(Prototyper.java:102)        at org.logicalcobwebs.proxool.PrototyperThread.run(PrototyperThread.java:44)

I don't know where the error is...
I have completely uninstalled the MySQL database, deleted the registry, restarted the computer, and re-installed MySQL...

Who has configured openfire ??!?!?!?

============= Solution 1 ======================

Host-name?
Database-name?

Openfire configuration error