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Cloud computing is established on advanced software technologies intended to enhance the scalability of computing infrastructure by making full use of commodity servers. The more cloud computing relies on software technologies, the more software bugs have significant impacts on the system availability. Aging-related bugs, which cause the accumulation of errors in long time software execution, often remain even after the release of a stable version of the software. This paper investigates the bug reports of five major open-source software projects related to cloud computing and confirms the issues about the existence of aging-related bugs. From the investigation how the developers work around such aging-related bugs, the importance of the tool assistance for reproducing the aging problem in replicated site is discussed.