When you set a value for the MCAUSER attribute, enclose the value in single quotes to avoid issues with case sensitivity on distributed platforms.

当您设置mcauser属性的值时，应该将值包括在单引号中，以避免分布式平台上的区分大小写问题。

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All attributes in alphabetical order, preceded by a single space, with no space on either side of the equals sign, and double quotes around the attribute value.

所有的属性按照字母顺序排列，前面有一个空格，等号、包含属性值的双引号两侧没有空格。

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