Check following resources about activating longpolling:
- Official doc: https://www.odoo.com/documentation/11.0/setup/deploy.html#builtin-server
- Non-official doc: https://odoo-development.readthedocs.io/en/latest/admin/longpolling.html
In short, you need to start server with non-zero workers parameter::
openerp-server --workers=2 ...
and configure nginx:
location /longpolling {
proxy_pass http://127.0.0.1:8072;
}
location / {
proxy_pass http://127.0.0.1:8069;
}
If you use PgBouncer or something similar, be sure that LISTEN/NOTIFY features are supported. For PgBouncer it means that you have to use Session pooling
It's highly recommended to check odoo and postgresql settings about connections limits. In short, it must satisfy following condition:
(1 + workers + max_cron_threads) * db_maxconn < max_connections
Where max_connections is postgresql setting and the rest are from odoo.
Longpolling Icon:
- Red - There is no connection to the server. Offline mode
- Orange - There is a connection to the server, but we haven't received a response from polling yet
- Green - Online
- Rotating - Connection is updating
To manually reestablish connection or to check its presence click on the longpolling icon.
Wi-Fi Icon:
Shows the correctness of the order sending to the server
- Red - There are some unsent paid orders.
- Green - All paid orders were sent.
Wi-Fi sign can be reestablished only manually, or after the one another order is paid. If it is red make sure that the internet connection is on and click on the icon to send orders before turning off the device in order to prevent data loss. If internet connection is present but orders are not sending, it could mean that the error has occurred.