Question

I see the following error in the log:

Caused by:
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException:
No operations allowed after connection
closed.Connection was implicitly
closed by the driver.

I have reduced the wait_timeout in my.cnf to 60
Should I set the default value for this parameter?
I am told my Java Programmers that this may be one of the reasons.

Answer 1

I’ve had a same exception as yours, I think you did some operations after you closed the connection.For example:

{  

try{
Connecton conn = DriverManager.getConnection(…);

….

….

….

conn.close();

conn.commit();//Any operations on conn after conn.close() will throw //com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException

}catch(Exception e){

…

}finally{

…

}

}

The example shows how the exception come out.I think you did something like it does.