其实在阿里巴巴的《Java开发手册》里边，空指针，也就是NullPointerException 简称NPE的，怕一下子写出NPE，部分的伙伴看不懂，索性就改成了空指针。下文的空指针异常，我们用NPE表示。
I want to run tail on a named pipe to facilitate some binary logfile processing. The problem is that mysterious data is being added to the beginning of the stream. I run my tests by starting the erlan
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