MySQL/JDBC connectivity issue

[Arvind Kumar]

I have three RHL (2) and CentOS (1) environments, at disperse locations with MySQL 5.5.42 or higher installed.
I am able to make MySQL DB connection using SSH via MySQL workbench and putty both.
But using java client app I am able to connect only 1, others are giving jdbc error -

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstruct orAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingC onstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)

I tried most of solutions suggest on different forums. Can someone guide me please…