502 bad gateway on accessing /predict

[kazunori279]

After go through the webapp README, I got 502 bad gateway with my browser when I tried to access the page /predict.

Please find attached log files. Let me know if I should check other points.

logs.zip

[kazunori279]

Please also add troubleshooting tips when you get this error. Such as the locations of the log files you have to check.

[max-hana]

What is the permission of /var/run/uwsgi directory?

[kazunori279]

$ sudo ls -al /var/run/uwsgi/ total 8 drwxrwxr-x 2 root root 80 Mar 5 05:30 .

[max-hana]

Have you done these ? (it's in setup/linux_box.md )

$ sudo mkdir -m 775 /var/run/uwsgi
$ sudo chown brainpad:brainpad /var/run/uwsgi
$ sudo mkdir -m 775 /var/log/uwsgi
$ sudo chown brainpad:brainpad /var/log/uwsgi

[kazunori279]

Thanks, the commands removed the 502 error! (the shell history says I've done those, but apparently it wasn't in effective)

Now I've restarted the services, but sudo systemctl restart uwsgi-webapp.service doesn't come back to shell... is this expected? Also, I'm accessing /predict from browser, but it doesn't respond.

[max-hana]

I could not imagine how you encountered that, but let'me get you out of there.

Please do the following thing

chmod 777 /var/log/uwsgi   # just make sure
sudo systemctl stop nginx.service
sudo systemctl stop uwsgi-webapp.service
sudo kill -9 <the process # of `/usr/local/bin/uwsgi --ini /etc uwsgi/webapp.ini`>
sudo rm /var/run/uwsgi/webapp.*

wait a while, and then start uwsgi.

I'm not sure but may be it's safer to stop nginx before rebooting any uWSGI service.

[kazunori279]

I was able to access the "Find You Candy" UI!

But when I made a voice request, it says "something went wrong". I found the following error on webapp.log. FYI, I tried camera_tune.py again and it worked well.

2017-03-05 15:15:59,477 - candysorter.views.api - WARNING - Retrying: 5 times. 2017-03-05 15:15:59,579 - candysorter.views.api - ERROR - Unexpected error. Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1612, in full _dispatch_request rv = self.dispatch_request() File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1598, in dispatch_request return self.view_functionsrule.endpoint File "./candysorter/views/api.py", line 102, in wrapper return f(*args, **kwargs) File "./candysorter/views/api.py", line 152, in similarities img = _capture_image() File "./candysorter/views/api.py", line 432, in _capture_image raise Exception('Failed to capture image.') Exception: Failed to capture image.

[rindai87]

Are you actually putting candies on marker paper?

[kazunori279]

yes, and confirmed that camera_tune.py detected the candies.

I was able to get the detailed Exception:

OpenCV Error: Assertion failed (scn == 3 || scn == 4) in cvtColor, file /home/brainpad/opencv_from_git/opencv/modules/imgproc/src/color.cpp, line 9748

[rindai87]

OK, this issue looks the same as #10. We instructed some troubleshoot. Can you check the issue, especially this comment might help you?