Concurrent exception handling and resolution in distributed object systems

We address the problem of how to handle exceptions in distributed object sy stems. In a distributed computing environment, exceptions may be raised sim ultaneously in different processing nodes and thus need to be treated in a coordinated manner. Mishandling concurrent exceptions can lead to catastrop hic consequences. We take two kinds of concurrency into account: 1) Several objects are designed collectively and invoked concurrently to achieve a gl obal goal and 2) multiple objects (or object groups) that are designed inde pendently compete for the same system resources. We propose a new distribut ed algorithm for resolving concurrent exceptions and show that the algorith m works correctly even in complex nested situations, and is an improvement over previous proposals in that it requires only O(n(max)N(2)) messages, th ereby permitting quicker response to exceptions.