Granted Patent B1

US 12,475,151 · App. 18/921,852 · Granted Nov 18, 2025

Inventors: Vijay Madisetti (Alpharetta, GA); Arshdeep Bahga (Chandigarh, IN)

Assignee: Vijay Madisetti

G06F16/3329G06F40/284

Abstract

Claims (77)

1 . A method executable by a server for large language model (LLM) agent failure detection of an LLM system comprising one or more LLMs and one or more agents interacting with the one or more LLMs comprising:

listening for an agent heartbeat signal from an agent of the one or more agents;

upon receiving the agent heartbeat signal from the agent, updating a most recent heartbeat timestamp for the agent;

upon a heartbeat threshold length of time elapsing without hearing receiving the agent heartbeat signal from the agent, designating the agent as a suspect agent;

probing the agent for a response;

upon receiving the response from the agent:

removing the suspect agent designation from the agent; and

updating the most recent heartbeat timestamp;

upon a response threshold length of time elapsing without receiving the response from the agent:

designating the agent as a failed agent;

sending a message to at least one of a service mesh or a message pool associated with the one or more agents regarding the agent being designated a failed agent;

receiving a requirement comprising at least one of an application to be executed by the agent or receiving a task to be performed by the agent;

analyzing the requirement to determine whether the requirement requires a replacement with a lesser degree of similarity or requires a replacement with a greater degree of similarity;

activating a shadow agent associated with the agent responsive to analyzing the requirement, comprising upon determining the requirement requires a replacement with a greater degree of similarity:

removing the agent from the at least one of the service mesh or messaging pool between the one or more agents; and

launching a shadow agent configured to have a greater degree of similarity to the agent relative to a replacement with a lesser degree of similarity;

integrating the shadow agent into the at least one of the service mesh or messaging pool between the one or more agents; and

restoring a known good state of the agent to the shadow agent, comprising:

retrieving the known good state of the agent from a checkpoint storage;

applying the known good state to the shadow agent;

receiving an alert that the agent has failed from a watchdog process associated with the agent; and

resuming operation of the LLM system with the shadow agent replacing the agent.

2 . The method of claim 1 , wherein the one or more agents is a plurality of agents.

3 . The method of claim 1 further comprising, upon determining the requirement requires a replacement with a lesser degree of similarity relative to a replacement with a greater degree of similarity, launching a shadow agent operable to perform a similar function to the agent.

4 . The method of claim 1 further comprising, upon the heartbeat threshold length of time elapsing without receiving the response from the agent, performing one or more of:

reassigning one or more tasks assigned to the agent to another agent of the one or more agents;

allocating additional resources to one or more other agents of the one or more agents; and

spawning one or more new agents to supplement the one or more agents.

5 . The method of claim 1 further comprising operating one or more auxiliary services operable to support the operation of at least one agent of the one or more agents.

6 . The method of claim 5 wherein the one or more auxiliary services comprises at least one of:

a logging service configured to track at least one of interactions, decisions, and internals states of the agent;

a guardrails service operable to enforce at least one of ethical constraints and safety measures on actions performed by the agent;

a memory management service operable to manage at least one of short-term memory storage and retrieval and long-term memory storage and retrieval for the agent;

an explanation generator service operable to generate human-readable explanations for decisions produced by the agent; and

a resource monitor service operable to at least one of track resource usage and optimize resource usage of the agent.

7 . The method of claim 6 , wherein the auxiliary services are carried out by a sidecar service within a service mesh.

8 . A large language model (LLM) system having agent fault-tolerance comprising:

a non-transitory computer-readable medium having stored thereon software comprising code executed by a processor implementing a method for a large language model (LLM) agent failure detection of the LLM system comprising:

one or more LLMs;

a plurality of agents operable to interact with the one or more LLMs a communication module network operable to establish at least one of a message pool or a service mesh configured to facilitate communication between the agents comprised by the plurality of agents;

a failure detection algorithm comprising:

listen for an agent heartbeat signal from an agent of the plurality of agents;

upon receiving the agent heartbeat signal from the agent, update a most recent heartbeat timestamp for the agent;

upon a heartbeat threshold length of time elapsing without hearing receiving the agent heartbeat signal from the agent, designate the agent as a suspect agent;

probe the agent for a response;

upon receiving the response from the agent:

remove the suspect agent designation from the agent; and

update the most recent heartbeat timestamp;

upon a response threshold length of time elapsing without receiving the response from the agent:

designate the agent as a failed agent;

send a message to the at least one of a message pool or a service mesh regarding the agent being designated a failed agent;

receive a requirement comprising at least one of an application to be executed by the agent or receiving a task to be performed by the agent;

analyze the requirement to determine whether the requirement requires a replacement with a lesser degree of similarity or requires a replacement with a greater degree of similarity:

activate a shadow agent associated with the agent responsive to analyzing the requirement, comprising upon determining the requirement requires a replacement with a greater degree of similarity:

 removing the agent from the at least one of the service mesh or messaging pool between the one or more agents; and

 launching a shadow agent configured to have a greater degree of similarity to the agent relative to a replacement with a lesser degree of similarity:

 integrating the shadow agent into the at least one of the service mesh or messaging pool between the one or more agents; and

 restoring a known good state of the agent to the shadow agent, comprising:

 retrieving the known good state of the agent from a checkpoint storage;

 applying the known good state to the shadow agent;

 receiving an alert that the agent has failed from a watchdog process associated with the agent; and

resume operation of the LLM system with the shadow agent replacing the agent; and

a communication device positioned in electronic communication with the processor and operable to send and receive electronic communication.

9 . The system of claim 8 wherein the failure detection algorithm is further configured to, upon determining the requirement requires a replacement with a lesser degree of similarity relative to a replacement with a greater degree of similarity, launch a shadow agent operable to perform a similar function to the agent.

10 . The system of claim 8 wherein the failure detection algorithm is further configured to, upon the heartbeat threshold length of time elapsing without receiving the response from the agent, perform one or more of:

reassign one or more tasks assigned to the agent to another agent of the plurality of agents;

allocate additional resources to one or more other agents of the plurality of agents; and

spawn one or more new agents to supplement the plurality of agents.

11 . The system of claim 8 wherein the plurality of agents is configured to send an agent state to a checkpoint storage via the at least one of the message pool or the service mesh.

12 . The system of claim 8 wherein the communication network is operable to maintain a backup of messages received by the at least one of the message pool or the service mesh.

13 . The system of claim 8 wherein the communication network comprises an integrity checking network operable to maintain the integrity of messages received by the at least one of the message pool or the service mesh.

14 . The system of claim 8 wherein the software further comprises code that is executable for at least one of:

a logging service operable to track at least one of interactions, decisions, and internals states of the agent;

a guardrails service operable to enforce at least one of ethical constraints and safety measures on actions performed by the agent;

a memory management service operable to manage at least one of short-term memory storage and retrieval and long-term memory storage and retrieval for the agent;

an explanation generator service operable to generate human-readable explanations for decisions produced by the agent; and

a resource monitor service operable to at least one of track resource usage and optimize resource usage of the agent.

Assignments (1)

Continuity (12)

References Cited (60)