如何在C ++中的mysql_init期间解决mysql错误“内存不足”？

Question

I have a problem with a new deployement of a server program "MyServer" on Ubuntu 12.04 . This program works fine on the 1st machine .

But on the new machine, the program MyServer return an exception during mysql_init() : " Insufficient memory: can not create handler for mysql_init() "

However these 2 machines have both 2Go RAM and MySQL seems to be well-installed (we can run request from mysql client) and have the same my.cnf .

This error appears during these lines :

sql::Driver * driver = get_driver_instance();

if(driver)
{
    // Lets try to connect.
    std::stringstream completeHost;
    completeHost << "tcp://"
                << (configuration->getSocket()->getHost())
                << ":"
                << (configuration->getSocket()->getPort());

    ////// **It throws this exception below** : //////
    sql::Connection * connection = driver->connect(completeHost.str(),
                                                   configuration->getUser(),
                                                   configuration->getPassword());
}

And the connection parameters are correct, since this is the same used with mysql client.

What's wrong ? Thanks a lot !

Answer 1

I just came across the same problem and I may have found a workaround. We also had two machines, one with our software working and the other one throwing the same message Insufficient memory: can not create handler for mysql_init() .

After a while, we noticed that the second machine went through some package updates. libmysqlclient18 was one of these packages.

Once i downgraded my libmysqlclient18 from 5.5.38 to 5.5.22 (the same version that the working one) it started working again !