A fault-tolerant java virtual machine

Abstract
We modify the Sun JDK1.2 to provide transparent fault- tolerance for many Java applications using a primary- backup architecture. We identify the sources of non- determinism in the JVM (including asynchronous excep- tions, multi-threaded access to shared data, and the non- determinism present at the native method interface) and guarantee that primary and backup handle them identi- cally. We analyze the overhead introduced in our system by each of these sources of non-determinism and compare the performance of different techniques for handling multi- threading.

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