The transport layer detects loss of connectivity between an application and the server and performs the necessary server cleanup. Loss of connectivity is detected via a ping mechanism between the Server and the Client. By default Pinging is disabled. When enabled, it instructs the FioranoMQ client library to send ping packets periodically to the FioranoMQ Server. The server on its part monitors ping requests on all connections and if it does not receive ping packets for any connection within a configured timeout, it assumes the connection is dead and shuts it down.

When to Enable Pinging

In some operating systems, the absence of any activity over a client socket for a period of time leads to its forceful shutdown by the OS. Enabling Pinging avoids this shutdown.

A network failure can not be detected for applications not sending requests to the server. With Pinging enabled, the application is notified of a network failure prior to the configured timeout.

Salient Features

The Configurable Parameter for Pinging includes the Ping Timeout Interval. This parameter specifies the time within which the client application is notified of a problem with connectivity. By default, this parameter is set to 4 minutes or 240,000 milliseconds. The lowest allowed value for this parameter is 30,000 milliseconds.

Pinging is automatically turned ON when the Socket Acceptor uses the HTTP protocol.

Since a connectivity problem is detected asynchronously for the application, an error is relayed through an exception set on the connection as per JMS Specifications.