[issue7123] Multiprocess Process does not always exit when run from a thread.

[Peter Saunders]

Peter Saunders <pajs at fodder.org.uk> added the comment:

Tested on Linux, and repeated the issue - just to confirm this isn't a
Solaris specific issue.

Tested using dummy_threading - bug does not appear when that is used.

Added _verbose=True to threads, and log_to_stderr(SUBDEBUG) set for Process.

Attached is the output of the script with those set. 

Other odd things to notice, and some point, more than 2 children
sometimes exist.. 

isalive PID: 7646 : True
isalive PID: 7652 : True
isalive PID: 7653 : True
isalive PID: 7646 : True
isalive PID: 7652 : True
isalive PID: 7653 : True
isalive PID: 7646 : True
isalive PID: 7653 : True

The code starts 2 threads, which start 2 processes. Both threads are
joined before new ones are started.. So, in theroy, only 2 should be
able to exist at once.. ?

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Added file: http://bugs.python.org/file15132/results1.txt

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