由于先前错误键入了JAAS别名数据而报告错误这种情况相当常见。
It is quite common for errors to be reported because JAAS alias data was mis-typed earlier.
如果出现错误，检查default_host的虚拟主机别名。
If you get errors, check virtual hosts alias for default_host.
该错误通常发生在输入了作为别名组成部分的不正确字符时。
This error generally occurs when an incorrect character is entered as part of an alias name.
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