Keep-alive ping

[bachpedersen]

Might be an idea to ping riak server every 30minutes if there was no activity to keep the connection open forever or to detect an error'ed connection.

Test how much time it take to make a connection (to se if its worth it) and if a ping can keep the connection open forever.

[guilhermeblanco]

I'd suggest also to define an internal counter of operations executed. When a certain number of operations is reached, reconnect. That way we can also prevent possible memory leaks.