Connection reestablishment protocol for peer communication in distributed systems

A computer program product comprising a non-transitory machine-readable medium storing instructions that, when executed by at least one programmable processor, cause the at least one programmable processor to perform operations comprising:

• retaining communication resumption information at each of a plurality of nodes of a cluster of nodes that comprises a distributed computing system;
• exchanging the communication resumption information between a node of the cluster and a peer node of the cluster after resumption of communication following a loss of communication between the node and the peer node;
• determining whether communication between the node and the peer node can be reestablished without losing messages, the determining comprising comparing the communication resumption information received by the node from the peer node with the communication resumption information retained at the node;
• and
• resuming communication between the node and the peer node based when the determining indicates that communication between the node and the peer node can be reestablished without losing messages.

A system comprising:

• computer hardware configured to perform operations comprising:
• retaining communication resumption information at each of a plurality of nodes of a cluster of nodes that comprises a distributed computing system;
• exchanging the communication resumption information between a node of the cluster and a peer node of the cluster after resumption of communication following a loss of communication between the node and the peer node;
• determining whether communication between the node and the peer node can be reestablished without losing messages, the determining comprising comparing the communication resumption information received by the node from the peer node with the communication resumption information retained at the node;
• and
• resuming communication between the node and the peer node based when the determining indicates that communication between the node and the peer node can be reestablished without losing messages.