collapse while run in a tornado ioloop of sub-process

[GoogleCodeExporter]

What steps will reproduce the problem?

import sys
if sys.version_info[0] < 3:
    readln = raw_input
else:
    readln = input

import logging

logging.root.setLevel(logging.DEBUG)
logging.root.addHandler(logging.StreamHandler())

import multiprocessing
import threading

import tornado.ioloop
import tornado.web
import PyV8

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        logging.info('MainHandler get')
        script = '''var i=0;'''
        logging.info('create engine')
        engine = PyV8.JSEngine()
        with PyV8.JSContext():
            logging.info('enter v8 >>>')
            compiled = engine.compile(script)
            logging.info('leave v8 <<<')
        print('compiled = {}'.format(compiled))
        self.write("Hello, world")

application = tornado.web.Application([
    (r"/", MainHandler),
])

def start_tornado():
    def _run():
        logging.info('start_tornado >>>')
        application.listen(8888)
        tornado.ioloop.IOLoop.instance().start()
        logging.info('start_tornado <<<')
    threading.Thread(target=_run).start()

if __name__ == '__main__':
    p = multiprocessing.Pool()
    p.apply(func=start_tornado)
    while True:
        readln()

What is the expected output? What do you see instead?

collapse while entering a context

What version of the product are you using? On what operating system?
on win32. linux32, python3.3, tornado3.01

Please provide any additional information below.

Original issue reported on code.google.com by RealTan...@gmail.com on 20 May 2013 at 11:00

[GoogleCodeExporter]

In theory, PyV8 should cowork with tornado when you use JSLock/JSUnlock, please 
check more detail in the unit test

https://code.google.com/p/pyv8/source/browse/trunk/PyV8.py#1819

Original comment by flier...@gmail.com on 20 May 2013 at 2:23

[GoogleCodeExporter]

Thanks! i checked it. now i think it has nothing to do the tornado ioloop. But 
perhaps PyV8 doesn't work sometimes in subprocesses. i'll check again...

Original comment by RealTan...@gmail.com on 21 May 2013 at 2:57

[GoogleCodeExporter]

Original comment by flier...@gmail.com on 10 Jul 2013 at 7:20

• Changed state: WontFix
• Added labels: OpSys-All