Mark Klein and Chrysanthos Dellarocas. Exception handling in agent systems. In Oren Etzioni, Jrg P. Mller, and Jerey M. Bradshaw, editors, Proceedings of the Third Annual Conference on Autonomous Agents (AGENTS-99), pages 6268, New York, May 15 1999. ACM Press.  Home/Search   Document Details and Download   Summary   TOC   Related Articles   Check

....in interruptions and additional work. Only one approach, the exception handling approach of Klein avoids additional costs and can be therefore used as a realistic approach to state detection. 3. 1 Exception handling (EH) The concept of exception Handling (EH) was first introduced by Klein [1]. It focuses on providing an exception handling service that is plugged , with little or no customization, into existing agent systems. This service can be viewed as a kind of coordination doctor . It knows about the different ways multi agent systems can get sick , actively looks system wide ....

Mark Klein, Chrysanthos Dellarocas, "Exception Handling in Agent Systems"

....failure, remove the sub team assignment to role in team operator, repair the sub team hierarchy. Go to step 1. The second tier supports the definition of correlation rules that are discovered by experienced operators. 3. 4 Exception Handling o Tier 3 Discovering Correlation Rules Klein [13] pioneered the now widely used Exception Handling (EH) method, a domain independent fault management approach. It focuses on providing an exception handling service that is plugged , with little or no customization, into an existing MAS. EH can be viewed as a coordination physician that knows ....

Mark Klein and Chrysanthos Dellarocas. "Exception Handling in Agent Systems". Proceedings of the Third International Conference on Autonomous Agents, Seattle, WA, May 1-5, 1999.

....and for achieving cooperative behavior between teams of helicopters in dynamic, unpredictable environments [12] However, the helicopter teams are not persistent in the sense that if one of the helicopters gets shot down, the original joint persistent goal ceases to exist. Hgg [9] and Klein [13] advocate fault tolerance approaches that use external sentinels to monitor the progress of a multi agent system, diagnose problematic situations, and initiate recovery actions. In teamwork based approaches, the problem solving agents themselves participate in the fault tolerance process. Also, ....

M. Klein and C. Dellarocas. Exception Handling in Agent Systems. . In Proceedings of the 3 rd International Conference on Autonomous Agents, Seattle, 1999.

....gets shot down, the original joint persistent goal ceases to exist. This situation may lead to undesired behavior as the surviving team members can now drop their individual goals because of the impossibility of establishing mutual belief with the helicopter that was shot down. Hgg [11] and Klein [15] use fault tolerance approaches that do not make use of the teamwork theory. These work use external sentinels to monitor the progress of a multi agent system, diagnose problematic situations, and initiate recovery actions. In teamwork based approaches, the problem solving agents themselves ....

M. Klein and C. Dellarocas. Exception Handling in Agent Systems. Autonomous Agents `99, Seattle, 1999.

....activities and coordinate their efforts with each others. The agents can negotiate with each other and provide the reasoning with which to diagnose and handle exceptions and other failures. Klein exploits a knowledge base of generic exception detection, diagnosis, and resolution expertise [16]. Specialized agents are dedicated to exception handling. This approach is complementary to ours, and the two approaches can be combined in two ways. One, we can use special roles designed only to detect and diagnose exceptions. Two, we can include in each agent a certain reasoning capability for ....

Mark Klein. Exception handling in agent systems. In Proceedings of the Third International Conference on Autonomous Agents, Seattle, Washington, 1999.

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Klein, M. and C. Dellarocas (1999). "Exception Handling in Agent Systems." Proceedings of the Third International Conference on Autonomous Agents (Agents '99). Seattle, Washington, pp. 62-8.

....include evaluating the selective SRR approach when there are more than two resources. This research is part of the author s long standing efforts to develop a systematic enumeration of the different multi agent system exception types as well as how they can be addressed in open systems contexts [11] [12] See http: ccs.mit.edu klein for further details on this work. Acknowledgements This work was supported by the NSF Computational and Social Systems program as well as the DARPA Control of Agent Based Systems program. ....

Klein, M. and C. Dellarocas. Exception Handling in Agent Systems. In the proceedings of Proceedings of the Third International Conference on AUTONOMOUS AGENTS (Agents '99). 1999. Seattle, Washington.

.... coalition military forces [13] 14] 15] 16] 17] Such open systems introduce a wide range of potentially devastating exceptions including infrastructure failures, agents reneging on commitments, denial of service attacks, emergent dysfunctions such as chaotic behavior [18] 19] and so on [20] The vast majority of MAS work to date, however, has considered only well behaved agents running on reliable infrastructures in relatively simple domains [21] 22] One possible approach to handling contract execution exceptions is to simply require that agents charge less for their services in ....

Klein, M. and C. Dellarocas. Exception Handling in Agent Systems. in Proceedings of the Third International Conference on AUTONOMOUS AGENTS (Agents '99). 1999. Seattle, Washington.

....accumulate a knowledge base of exception types and handlers, focusing mainly on auction mechanisms. Our current commitment representation is semi formal. Formally represented commitment structures can offer additional power, for example as a basis of [semi ]automated exception diagnosis services [54] [55] 56] If a given role has failed to achieve a commitment, and none of the commitments it in turn requires have been violated, then we can infer that the agent implementing the role has failed, otherwise we can trace back through the causal web of the commitment structure to find the ....

Klein, M. and C. Dellarocas. Exception Handling in Agent Systems. in Proceedings of the Third International Conference on AUTONOMOUS AGENTS (Agents '99). 1999. Seattle, Washington.

.... and relies upon several ancillary services such as an agent ID authority (which certifies unique IDs for each agent type) a reputation server (which tracks performance for each agent type) and a contract notary (that keeps track of which agents are performing which tasks for whom) See (Klein and Dellarocas 1999) and (Dellarocas and Klein 1999) as well as forthcoming papers from our group, for further details. 6 The potential advantages of this approach are manifold. Citizen agents can be implemented much more simply, relying on relatively lightweight and efficient coordination protocols. Exception ....

.... as an agent ID authority (which certifies unique IDs for each agent type) a reputation server (which tracks performance for each agent type) and a contract notary (that keeps track of which agents are performing which tasks for whom) See (Klein and Dellarocas 1999) and (Dellarocas and Klein 1999), as well as forthcoming papers from our group, for further details. 6 The potential advantages of this approach are manifold. Citizen agents can be implemented much more simply, relying on relatively lightweight and efficient coordination protocols. Exception handling performance can be ....

Klein, M. and C. Dellarocas (1999). Exception Handling in Agent Systems. Proceedings of the Third International Conference on AUTONOMOUS AGENTS (Agents '99), Seattle, Washington.

....processes The exception fixing process is enacted at design time, producing the enhanced Contract Net protocol. Collect learnings N A TABLE 1. An example of a design time exception management meta process. A run time exception handling approach being developed by the authors (Dellarocas and Klein 1999) (Klein and Dellarocas 1999) can, by contrast, be described as follows (Table 2) Subtask How Implemented Identify target exceptions The target exceptions are identified at run time by querying the agents as to which coordination mechanism they will use, and then querying the exception ....

....The exception fixing process is enacted at design time, producing the enhanced Contract Net protocol. Collect learnings N A TABLE 1. An example of a design time exception management meta process. A run time exception handling approach being developed by the authors (Dellarocas and Klein 1999) (Klein and Dellarocas 1999) can, by contrast, be described as follows (Table 2) Subtask How Implemented Identify target exceptions The target exceptions are identified at run time by querying the agents as to which coordination mechanism they will use, and then querying the exception repository to find all the ....

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Klein, M. and C. Dellarocas (1999). Exception Handling in Agent Systems. Proceedings of the Third International Conference on AUTONOMOUS AGENTS (Agents '99), Seattle, Washington.

.... are tied up with low priority tasks and several high priority contractors remain unsatisfied (Chia, Neiman and Lesser 1998) In our previous work, we have developed methodologies and tools that assist the systematic discovery and classification of exceptions (Dellarocas and Klein 1998; Klein and Dellarocas 1999). Using these methodologies, we have performed a systematic analysis of contract net exceptions, a subset of which are listed in Figure 2. 2.2 Design of Candidate Institutions For each exception type identified by the previous analysis, we then design one or more handling mechanisms, i.e. ....

Klein, M., and Dellarocas, C. "Exception Handling in Agent Systems," in Proceedings of the Third International Conference on Autonomous Agents, Seattle, Washington, May 1999, pp. 62-68.

....exception cause has been determined, the resolution component selects one of the resolution strategies present in the knowledge base and starts firefighter agents in order to enact it and bring the society back to an acceptable state. The exception handling service is described in more detail in [12]. 3 A methodology for developing Civil Agent Societies The framework presented in the previous section is meant to be the basis for a systematic, exploratory methodology for designing open marketplaces. This section describes our ongoing experience with using the framework in order to construct ....

Klein, M., and Dellarocas, C. "Exception Handling in Agent Systems" in Proceedings of the Third International Conference on Autonomous Agents, Seattle, Washington, May 1999, pp. 62-68.

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Mark Klein and Chrysanthos Dellarocas. Exception handling in agent systems. In Oren Etzioni, Jrg P. Mller, and Jerey M. Bradshaw, editors, Proceedings of the Third Annual Conference on Autonomous Agents (AGENTS-99), pages 6268, New York, May 15 1999. ACM Press.

No context found.

M. Klein and C. Dellarocas. Exception handling in agent systems. Proceeding of the Third International Conference on Autonomous Agents, May 1999.

No context found.

M. Klein and C. Dellarocas. Exception handling in agent systems. Proceeding of the Third International Conference on Autonomous Agents, May 1999.

No context found.

Klein, M. and Chrysanthos, D. (1999). Exception Handling in Agent Systems. In Proceedings of the Third International Conference on Autonomous Agents. Seattle, Washington.

No context found.

Mark Klein and Chrysanthos Dellarocas, "Exception Handling in Agent Systems", Proceedings of the Third International Conference on Autonomous Agents, Seattle, WA, May 1-5, 1999.

No context found.

Klein M. and C. Dellarocas, Exception Handling in Agent Systems, Proceedings of the Third Annual Conference on Autonomous Agents, Seattle, USA, 1999, 62-68.

No context found.

M. Klein and C. Dellarocas. Exception handling in agent systems. In O. Etzioni, J. P. Muller, and J. M. Bradshaw, editors, Proceedings of the Third International Conference on Autonomous Agents (Agents'99), pages 62--68. ACM Press, 1999.

No context found.

Klein, M. 1999. Exception handling in agent systems. In Proc. 3rd International Conference on Autonomous Agents.

No context found.

Klein, M., & Dellarocas, C. (1999). Exception handling in agent systems. J. M. Bradshaw, O. Etzioni, & J. Mueller (ed.), Proceedings of Autonomous Agents '99, Seattle, WA. New York: ACM Press. Forthcoming.

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