Resilient peer-to-peer application message routing

A non-transitory, computer-readable storage medium or media comprising computer instructions which when executed causes a primary tracker node and a secondary tracker node to perform a method of resilient peer-to-peer application message routing comprising the steps of:

• registering, by the primary tracker node, a first destination application and a second destination application, where the first destination application is the same as the second destination application and both the first destination application and the second destination application have the same destination address;
• providing, by the primary tracker node, peer nodes of a network and a secondary tracker node with a copy of a network routing table that includes destination addresses of destination applications hosted on the peer nodes, where the network routing table is useable to route an application message from a querying one of the peer nodes to a destination address designating a destination application hosted by a destination peer node;
• providing, by the primary tracker node, when the first destination application hosted by the destination peer node is inactivated, all of the peer nodes and the secondary tracker node with a copy of an updated routing table indicating inactivation of the first destination application and routing of the application message to the second destination application,
• wherein a further application message addressed from any of the peer nodes to the destination address associated with the inactivated first destination application is routed, via the updated routing table, to the second destination application having the same destination address as the inactivated first destination application, and
• wherein the secondary tracker node, in case of failure of the primary tracker node, performs the providing steps for the primary tracker node including, in response to a request from the querying peer node for a copy of the updated routing table having a most recent version number, providing a copy of the updated routing table having the most recent version number to the querying peer node.