Apparatus, system, and method for automatically freeing a server resource locked awaiting a failed acknowledgement from a client

A system to free a server resource locked awaiting a failed acknowledgement from a client, the system comprising:

• a client configured to communicate over a network using a protocol in which certain transaction messages require the client to send an acknowledgement (ACK) message in response to a received message;
• a transaction processing system (TPS) configured to communicate over the network to satisfy database transactions initiated from the client;
• and
• a transaction manager within the TPS configured to determine a timeout value for a communication session between the TPS and the client, the timeout value comprising an average message round-trip time delay between the TPS and the client plus a dynamically adjustable default delta value, and further configured to send an output message to the client at a send time and lock a TPS resource in anticipation of the ACK message from the client, the TPS resource being used to generate the output message, and further configured to calculate an ACK timer comprising a difference between the send time and a current time and to send a notification of the locked TPS resource in response to the ACK timer exceeding the timeout value, the transaction manager not receiving the ACK message from the client, and a server delta value set to a predefined value.

A signal bearing medium tangibly embodying a program of machine-readable instructions executable by a digital processing apparatus to perform operations to automatically free a server resource locked awaiting a failed acknowledgement from a client the operations comprising:

• an operation to determine a timeout value for communications between a server and a client, the timeout value comprising an average message round-trip time delay between the server and the client plus a default delta value;
• operation to send an output message to the client at a send time and lock a server resource in anticipation of an acknowledgement (ACK) message from the client, the server resource being used to generate the output message;
• operation to calculate an ACK timer comprising a difference between the send time and a current time;
• and
• operation to free the server resource in response to the ACK timer exceeding the timeout value and not receiving the ACK message from the client.