Help me understand a part of Java Language Specification

Posted by Software Engeneering Learner on Programmers See other posts from Programmers or by Software Engeneering Learner
Published on 2012-11-27T20:04:42Z Indexed on 2012/11/27 23:28 UTC
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java

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multithreading

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concurrency

I'm reading part 17.2.1 of Java language specification: http://docs.oracle.com/javase/specs/jls/se7/html/jls-17.html#jls-17.2.1

I won't copy a text, it's too long, but I would like to know, why for third step of sequence they're saying that

If thread t was removed from m's wait set in step 2 due to an interrupt

Thread couldn't get to step 2 it wasn't removed from wait set, because it written for the step 1:

Thread t does not execute any further instructions until it has been removed from m's wait set

Thus thread can't be removed from wait set in step 2 whatever it's due to, because it was already removed.

Please help me understand this.

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