Freeze after wifi drop

[Navarro11]

Hello,

at first I have to say this project is really awesome and I love it!

Unfortunatelly I have one problem. If I open web page on mobile phone and then disable wifi on phone, server hangs and is impossible to open web page from another device.

remi.server INFO Started httpserver http://127.0.0.1:8081/
remi.request INFO Authenticating
192.168.0.59 - - [02/Dec/2018 22:35:59] "GET / HTTP/1.1" 401 -
remi.request INFO built UI (path=/)
remi.request DEBUG get: /
192.168.0.59 - - [02/Dec/2018 22:35:59] "GET / HTTP/1.1" 200 -
remi.server.ws INFO connection established: ('192.168.0.59', 52236)
remi.server.ws DEBUG handle
remi.server.ws DEBUG handshake
remi.server.ws INFO handshake complete
remi.server.ws DEBUG send_message: 0306000353... -> ('192.168.0.59', 52236)
remi.server.ws DEBUG send_message: 3... -> ('192.168.0.59', 52236)
remi.server.ws DEBUG on_message: connected
remi.server.ws DEBUG send_message: 3... -> ('192.168.0.59', 52236)
remi.server.ws DEBUG on_message: callback
remi.request DEBUG App.onload event occurred
remi.server.ws DEBUG send_message: 3... -> ('192.168.0.59', 52236)
remi.server.ws DEBUG on_message: callback
remi.request DEBUG App.onpageshow event occurred
remi.server.ws DEBUG send_message: 1306009182... -> ('192.168.0.59', 52236)
remi.request DEBUG get: /favicon.ico
remi.request DEBUG get: /favicon.ico
remi.server.ws DEBUG send_message: 1306009182... -> ('192.168.0.59', 52236)
remi.server.ws DEBUG send_message: 1306009182... -> ('192.168.0.59', 52236)
remi.server.ws DEBUG send_message: 1306009182... -> ('192.168.0.59', 52236)
remi.server.ws DEBUG send_message: 1306009182... -> ('192.168.0.59', 52236)

Somewhere here I disable wifi on phone.

remi.server.ws DEBUG send_message: 1306009182... -> ('192.168.0.59', 52236)
remi.server.ws DEBUG send_message: 1306009182... -> ('192.168.0.59', 52236)
remi.server.ws DEBUG send_message: 1306009182... -> ('192.168.0.59', 52236)
remi.server.ws DEBUG send_message: 1306009182... -> ('192.168.0.59', 52236)

At this point it hangs forever. Sometimes if I reenable wifi on phone, this line shows up and then server acts normally.

remi.server.ws DEBUG ws ending websocket service

What can be wrong?

Thank you.

[dddomodossola]

Hello @Navarro11 , thank you for reporting. Which version are you using? Can you show here your script?

[Navarro11]

Hello,

I'm using last stable version installed via pip.

Script:
main.txt

[dddomodossola]

I will be unable to debug this for about 3 days. Can you please make a test with one of the examples? does it happen the same with them? check that the parameter multiple_instances have to be the same, change it in the example to meet the value of your script

[Navarro11]

I've tried widgets_overview_app.py and it is same. After some time after wifi drop on mobile phone, webpage is not accessible from any device.

[dddomodossola]

@Navarro11 you found an important bug in this version. I will debug and prepare a fix in some days. Waiting for the fix you can use the previous version 1.2.2 .

[dddomodossola]

@Navarro11 I pushed a possible fix on master branch. Can you please install it directly from GitHub (not pypi) and let me know if this fixes the problem?

[Navarro11]

@dddomodossola I'm really sorry but this didn't help. Behaviour after disconnecting phone is the same.

[dddomodossola]

@Navarro11 thank you for the test.

Can you please confirm me you updated your remi version with the following command?
pip install git+https://github.com/dddomodossola/remi.git

Furthermore, which python version are you using?

[Navarro11]

I don't have git installed so I use zip file:
pip3 install https://github.com/dddomodossola/remi/archive/master.zip
I use python 3.5.3. I tried it with Python 2.7 as well and nothing changed.

[dddomodossola]

@Navarro11 I will do some additional test and provide you a solution ;-)

[dddomodossola]

@Navarro11 I tried to reproduce your problem with different python version but it works correctly. do you have further info that can help?

[Navarro11]

Hello @dddomodossola, I thought wifi router is the problem, but I tried connect via hotspot on mobile phone and the behaviour is still the same. I created hotspot on phone and connect raspberry and pc to it. Via ssh on phone I ran script on raspberry. I opened webpage on pc and after while I blocked pc on hotspot, so pc was force disconnected. After that webpage opened on phone stopped updating and refresh was not successful. Then I tried cancel script on ssh via ctrl+c, but there popped up some error message in server.py that "endpoint is not connected" or something like this, and script was not cancelled so I had to restart ssh.

[dddomodossola]

@Navarro11 thank you a lot for helping me investigating on this problem. Which command you executed to start the script? have you used nohup?

[Navarro11]

I run script simply python3 main.py.