修复CM API代码以及ClearQuest Web代码中出现的内存泄漏问题以及死锁问题。

Fixed memory leak problem and deadlock issue in CM API code and in ClearQuest Web code.

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如果实现得不好，将导致包括性能问题、死锁以及异常的应用程序行为等各类问题。

Implemented badly, this can lead to all types of issues, from performance problems to deadlocks to unexpected application behavior.

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但是当死锁的频率或比例较高时容易出现问题。

However, it can be a problem when the frequency or percentage of deadlocks is high.

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