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Newbie - Connection Issues
Posted by: William Spence
Date: September 18, 2020 11:42AM

I apologize upfront because I am a newbie to C, and a newbie to MYSQL Connector and I am sure this will seem simple to many of you.

I have a MYSQL database set up on Amazon RDS and it is working great, and I have a parallel EC2 server set up to process a lot of the database data. I am writing some C programs to process some of the data very quickly as CRON jobs. I am using NetBeans as an IDE to do all of my work in. The C applications work great from my personal laptop, but when I transfer the applications to my EC2 server, they no longer work. I know that the addresses, database names, ports, and passwords are all correct because I have PHP scripts that are regularly running on the EC2 server and they are connecting just fine, so I know that the machine is capable of connecting to the database using the credentials I have. But my C applications are not reaching the database.

My only thought is that some mysql library is not being accessed by the C application, and therefore it cannot connect. Do you have to install MYSQL Connector C on all the destination machines that you are running the C application on? Or do libraries get packaged with the C application and should work on any machine?

Thanks for any insights, I appreciate your patience.

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