Why are my clients disconnecting during idle time?

In Hazelcast IMDG, socket connections are created with the SO_KEEPALIVE option enabled by default. In most operating systems, default keep-alive time is 2 hours. If you have a firewall between clients and servers which is configured to reset idle connections/sessions, make sure that the firewall's idle timeout is greater than the TCP keep-alive defined in the OS.

For additional information please see:

• Using TCP keepalive under Linux
• Microsoft TechNet