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How to set Debug mode in Tornado?
Tornado Startup ManagementScalability problem (Tornado). Can't figure it out, holding up launchnginx as proxy to tornado: 301 redirectNginx Tornado Combination Causing 502 Bad Gateway Errorscan I use Tornado without any proxy?Uninstall Tornado Web Server?How can I serve static files with nginx but use a slightly different url for tornado?Supervisord, Flask, Tornado (exit status 1; not expected)How to redirect nginx to tornado backend running httpsTornado server on port 80/443, any issues?
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I googled and found a hint that I should set debug mode in Tornado so that it could reload files automatically on update. But I didn't find an exact string to insert. I tried different combinations similar to this application.settings = "Debug": True but it doesn't help.
tornado
asked May 26 '11 at 11:09
Sergei BasharovSergei Basharov
2041311
add a comment |
I googled and found a hint that I should set debug mode in Tornado so that it could reload files automatically on update. But I didn't find an exact string to insert. I tried different combinations similar to this application.settings = "Debug": True but it doesn't help.
tornado
asked May 26 '11 at 11:09
Sergei BasharovSergei Basharov
2041311
i think it should be "debug":True
– jondinham
Mar 2 '12 at 5:52
add a comment |
I googled and found a hint that I should set debug mode in Tornado so that it could reload files automatically on update. But I didn't find an exact string to insert. I tried different combinations similar to this application.settings = "Debug": True but it doesn't help.
tornado
asked May 26 '11 at 11:09
Sergei BasharovSergei Basharov
2041311
I googled and found a hint that I should set debug mode in Tornado so that it could reload files automatically on update. But I didn't find an exact string to insert. I tried different combinations similar to this application.settings = "Debug": True but it doesn't help.
tornado
tornado
asked May 26 '11 at 11:09
Sergei BasharovSergei Basharov
2041311
asked May 26 '11 at 11:09
Sergei BasharovSergei Basharov
2041311
asked May 26 '11 at 11:09
Sergei BasharovSergei Basharov
2041311
asked May 26 '11 at 11:09
Sergei BasharovSergei Basharov
2041311
asked May 26 '11 at 11:09
Sergei BasharovSergei Basharov
2041311
2041311
i think it should be "debug":True
– jondinham
Mar 2 '12 at 5:52
add a comment |
i think it should be "debug":True
– jondinham
Mar 2 '12 at 5:52
i think it should be "debug":True
– jondinham
Mar 2 '12 at 5:52
i think it should be "debug":True
– jondinham
Mar 2 '12 at 5:52
add a comment |
2 Answers
2
active
oldest
votes
Here's a tweaked example from the tornado site:
if __name__ == "__main__":
application = tornado.web.Application([
(r"/", MainHandler)
], debug=True)
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
answered Apr 4 '12 at 22:06
Jon HaddadJon Haddad
90731119
2
"debug=True" has to be outside of the list of handlers for it to work---like this: "...],debug=True)"
– Hemm
Apr 17 '12 at 4:18
Good catch, I had written it without checking it. Updated my answer accordingly.
– Jon Haddad
May 1 '12 at 20:01
add a comment |
For those who like the debug=True option and using Tornado-multiprocess the following error will be raised:
Traceback (most recent call last):
File "./main.py", line 54, in <module>
server.start(0) # forks one process per cpu
File "/Users/me/Library/Python/2.7/lib/python/site-packages/tornado/tcpserver.py", line 221, in start
process.fork_processes(num_processes)
File "/Users/me/Library/Python/2.7/lib/python/site-packages/tornado/process.py", line 130, in fork_processes
raise RuntimeError("Cannot run in multiple processes: IOLoop instance "
RuntimeError: Cannot run in multiple processes: IOLoop instance has already been initialized. You cannot call IOLoop.instance() before calling start_processes()
This is because debug=True load IOLoop and it cannot be loaded twice.
According to the documentation
Setting debug=True is equivalent to autoreload=True,
compiled_template_cache=False, static_hash_cache=False,
serve_traceback=True.
So when using debug=True Tornado also sets ( for convenience ) another flag: autoreload=True which "watch" for changes and reload the server.
The autoreload option is the one that cannot be turned on when using multi-process.
So you need to configure it like so:
if __name__ == "__main__":
application = tornado.web.Application([
(r"/", MainHandler)
], debug=True, autoreload=False)
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
answered Jun 3 at 9:29
Ricky LeviRicky Levi
1285
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Here's a tweaked example from the tornado site:
if __name__ == "__main__":
application = tornado.web.Application([
(r"/", MainHandler)
], debug=True)
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
answered Apr 4 '12 at 22:06
Jon HaddadJon Haddad
90731119
2
"debug=True" has to be outside of the list of handlers for it to work---like this: "...],debug=True)"
– Hemm
Apr 17 '12 at 4:18
Good catch, I had written it without checking it. Updated my answer accordingly.
– Jon Haddad
May 1 '12 at 20:01
add a comment |
Here's a tweaked example from the tornado site:
if __name__ == "__main__":
application = tornado.web.Application([
(r"/", MainHandler)
], debug=True)
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
answered Apr 4 '12 at 22:06
Jon HaddadJon Haddad
90731119
2
"debug=True" has to be outside of the list of handlers for it to work---like this: "...],debug=True)"
– Hemm
Apr 17 '12 at 4:18
Good catch, I had written it without checking it. Updated my answer accordingly.
– Jon Haddad
May 1 '12 at 20:01
add a comment |
Here's a tweaked example from the tornado site:
if __name__ == "__main__":
application = tornado.web.Application([
(r"/", MainHandler)
], debug=True)
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
answered Apr 4 '12 at 22:06
Jon HaddadJon Haddad
90731119
Here's a tweaked example from the tornado site:
if __name__ == "__main__":
application = tornado.web.Application([
(r"/", MainHandler)
], debug=True)
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
answered Apr 4 '12 at 22:06
Jon HaddadJon Haddad
90731119
edited May 1 '12 at 20:00
answered Apr 4 '12 at 22:06
Jon HaddadJon Haddad
90731119
answered Apr 4 '12 at 22:06
Jon HaddadJon Haddad
90731119
answered Apr 4 '12 at 22:06
Jon HaddadJon Haddad
90731119
90731119
2
"debug=True" has to be outside of the list of handlers for it to work---like this: "...],debug=True)"
– Hemm
Apr 17 '12 at 4:18
Good catch, I had written it without checking it. Updated my answer accordingly.
– Jon Haddad
May 1 '12 at 20:01
add a comment |
2
"debug=True" has to be outside of the list of handlers for it to work---like this: "...],debug=True)"
– Hemm
Apr 17 '12 at 4:18
Good catch, I had written it without checking it. Updated my answer accordingly.
– Jon Haddad
May 1 '12 at 20:01
2
2
"debug=True" has to be outside of the list of handlers for it to work---like this: "...],debug=True)"
– Hemm
Apr 17 '12 at 4:18
"debug=True" has to be outside of the list of handlers for it to work---like this: "...],debug=True)"
– Hemm
Apr 17 '12 at 4:18
Good catch, I had written it without checking it. Updated my answer accordingly.
– Jon Haddad
May 1 '12 at 20:01
Good catch, I had written it without checking it. Updated my answer accordingly.
– Jon Haddad
May 1 '12 at 20:01
add a comment |
For those who like the debug=True option and using Tornado-multiprocess the following error will be raised:
Traceback (most recent call last):
File "./main.py", line 54, in <module>
server.start(0) # forks one process per cpu
File "/Users/me/Library/Python/2.7/lib/python/site-packages/tornado/tcpserver.py", line 221, in start
process.fork_processes(num_processes)
File "/Users/me/Library/Python/2.7/lib/python/site-packages/tornado/process.py", line 130, in fork_processes
raise RuntimeError("Cannot run in multiple processes: IOLoop instance "
RuntimeError: Cannot run in multiple processes: IOLoop instance has already been initialized. You cannot call IOLoop.instance() before calling start_processes()
This is because debug=True load IOLoop and it cannot be loaded twice.
According to the documentation
Setting debug=True is equivalent to autoreload=True,
compiled_template_cache=False, static_hash_cache=False,
serve_traceback=True.
So when using debug=True Tornado also sets ( for convenience ) another flag: autoreload=True which "watch" for changes and reload the server.
The autoreload option is the one that cannot be turned on when using multi-process.
So you need to configure it like so:
if __name__ == "__main__":
application = tornado.web.Application([
(r"/", MainHandler)
], debug=True, autoreload=False)
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
answered Jun 3 at 9:29
Ricky LeviRicky Levi
1285
add a comment |
For those who like the debug=True option and using Tornado-multiprocess the following error will be raised:
Traceback (most recent call last):
File "./main.py", line 54, in <module>
server.start(0) # forks one process per cpu
File "/Users/me/Library/Python/2.7/lib/python/site-packages/tornado/tcpserver.py", line 221, in start
process.fork_processes(num_processes)
File "/Users/me/Library/Python/2.7/lib/python/site-packages/tornado/process.py", line 130, in fork_processes
raise RuntimeError("Cannot run in multiple processes: IOLoop instance "
RuntimeError: Cannot run in multiple processes: IOLoop instance has already been initialized. You cannot call IOLoop.instance() before calling start_processes()
This is because debug=True load IOLoop and it cannot be loaded twice.
According to the documentation
Setting debug=True is equivalent to autoreload=True,
compiled_template_cache=False, static_hash_cache=False,
serve_traceback=True.
So when using debug=True Tornado also sets ( for convenience ) another flag: autoreload=True which "watch" for changes and reload the server.
The autoreload option is the one that cannot be turned on when using multi-process.
So you need to configure it like so:
if __name__ == "__main__":
application = tornado.web.Application([
(r"/", MainHandler)
], debug=True, autoreload=False)
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
answered Jun 3 at 9:29
Ricky LeviRicky Levi
1285
add a comment |
For those who like the debug=True option and using Tornado-multiprocess the following error will be raised:
Traceback (most recent call last):
File "./main.py", line 54, in <module>
server.start(0) # forks one process per cpu
File "/Users/me/Library/Python/2.7/lib/python/site-packages/tornado/tcpserver.py", line 221, in start
process.fork_processes(num_processes)
File "/Users/me/Library/Python/2.7/lib/python/site-packages/tornado/process.py", line 130, in fork_processes
raise RuntimeError("Cannot run in multiple processes: IOLoop instance "
RuntimeError: Cannot run in multiple processes: IOLoop instance has already been initialized. You cannot call IOLoop.instance() before calling start_processes()
This is because debug=True load IOLoop and it cannot be loaded twice.
According to the documentation
Setting debug=True is equivalent to autoreload=True,
compiled_template_cache=False, static_hash_cache=False,
serve_traceback=True.
So when using debug=True Tornado also sets ( for convenience ) another flag: autoreload=True which "watch" for changes and reload the server.
The autoreload option is the one that cannot be turned on when using multi-process.
So you need to configure it like so:
if __name__ == "__main__":
application = tornado.web.Application([
(r"/", MainHandler)
], debug=True, autoreload=False)
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
answered Jun 3 at 9:29
Ricky LeviRicky Levi
1285
For those who like the debug=True option and using Tornado-multiprocess the following error will be raised:
Traceback (most recent call last):
File "./main.py", line 54, in <module>
server.start(0) # forks one process per cpu
File "/Users/me/Library/Python/2.7/lib/python/site-packages/tornado/tcpserver.py", line 221, in start
process.fork_processes(num_processes)
File "/Users/me/Library/Python/2.7/lib/python/site-packages/tornado/process.py", line 130, in fork_processes
raise RuntimeError("Cannot run in multiple processes: IOLoop instance "
RuntimeError: Cannot run in multiple processes: IOLoop instance has already been initialized. You cannot call IOLoop.instance() before calling start_processes()
This is because debug=True load IOLoop and it cannot be loaded twice.
According to the documentation
Setting debug=True is equivalent to autoreload=True,
compiled_template_cache=False, static_hash_cache=False,
serve_traceback=True.
So when using debug=True Tornado also sets ( for convenience ) another flag: autoreload=True which "watch" for changes and reload the server.
The autoreload option is the one that cannot be turned on when using multi-process.
So you need to configure it like so:
if __name__ == "__main__":
application = tornado.web.Application([
(r"/", MainHandler)
], debug=True, autoreload=False)
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
answered Jun 3 at 9:29
Ricky LeviRicky Levi
1285
answered Jun 3 at 9:29
Ricky LeviRicky Levi
1285
answered Jun 3 at 9:29
Ricky LeviRicky Levi
1285
answered Jun 3 at 9:29
Ricky LeviRicky Levi
1285
1285
add a comment |
add a comment |
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i think it should be "debug":True
– jondinham
Mar 2 '12 at 5:52