I have a severe problem with one database on a server. Everything seems to be ok, with the database and if I run a copy of the DB on a other server I can login an it runs without any problems. But despite all other Databases on the first server are running smoothly I can't login into that particualre DB. Either nothing happens or I get a an Error 500. In the log file with the option debug I found the following entries.

2017-10-28 12:12:26,376 23213 DEBUG economo_codoo_io odoo.modules.registry: Multiprocess signaling check: [Registry - 70 -> 70] [Cache - 10215 -> 10215]
2017-10-28 12:12:26,598 23213 INFO economo_codoo_io odoo.modules.registry: At least one model cache has been invalidated,
 signaling through the database.

I assume it is connected to the multiworker mode, but login in single worker mode is still not possible. As it is not signaled as an error it is maybe just a minor issue.

Note: module website is installed.