As you can see in the image which is attached,there is an memory leak in mariadb module.
Actually 5 part, which are mentioned below, are linked to memory leak.
When I figured out it, I have checked about some kinds of mistakes in my code. But, I could not find out any kinds of mistake to take place the memory leak.
In addition to that I checked mysql client, and there is no memory leak.
so I think there is some memory leak in mariadb java client.