Abstract: Which is mainly due to relaxed-scheduled messages exchanges among processes and the concurrent running of processes .Furthermore , as non-determinism will complicate the distributed system test , this paper also gives some guidance about how to avoid or control non-determinism at a tolerable level.Finally an effective solution is presented to resolve the non-determinism problem in the test of Uni-CRM, the Customer Relationship Management System of a large telecommunications corporation in China.

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