Getting the error 'Alert: can't load Database Config' while opening TAC

Problem Description

The connection to TAC fails with the following error message:

WARN HibernatePersistenceAdapter - The database "jdbc:mysql://localhost:3306/talend_administrator?noDatetimeStringSync=true" is currently unreachable.



  1. Increase the wait_timeout variable in your MySQL database settings file, my.ini (Windows) or my.cnf (Linux). For example, in Linux modify the value in the /etc/my.cnf file with the following:
  2. Then restart the MySQL database.
  3. Add the hibernate properties in MySQL-Default master and staging in the Talend MDM database settings file jboss-4.2.2.GA\bin\datasources.xml, as follows:
    <datasource name="MySQL-Default"> 
    <property name="connection.autoReconnect">true</property> 
    <property name="connection.autoReconnectForPools">true</property> 
    <property name="">true</property> 
    <property name="hibernate.c3p0.acquire_increment">1</property> 
    <property name="hibernate.c3p0.idle_test_period">0</property> 
    <property name="hibernate.c3p0.timeout">0</property> 
    <property name="hibernate.c3p0.validate">true</property> 


Version history
Revision #:
4 of 4
Last update:
‎09-29-2018 12:12 AM
Updated by: