问题:

Hi I have created jdbc program and database is MySQL 5.1 Also all my friends using same database for connection. Total number of connection became 150 from all of us. So when i want to connect more then i got the following error

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.

How to resolve this error.

Thanks Sunil Kumar Sahoo

回答1:

I solved the problem by increasing number of connection

set @@global.max_connections = 1250;

Have a look on the below link http://www.netadmintools.com/art573.html

回答2:

Maybe you haven't create the databases or tables in the databases. Please check the reason behind "Could not create connection to database server."

I have met this error, because I didn't create the database.

回答3:

when you make a connection from higher versions of android version 9 to a mysql server you must always allow connections through:

if (Constants.VERSION_SDK > 9) {
      StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
      StrictMode.setThreadPolicy(policy);
}