Login only works if retries is not set to zero

[eavdmeer]

I had an application that was working just fine for over a year. I did, however, notice regular messages in the log, similar to this:

[session-file-store] will retry, error on last attempt: Error: ENOENT, open 'sessions/tRI6WeZEO2Uyvr4ZaUGW6_CU32RjvFpW.json'

That prompted me to do some research and someone mentioned using retries=0. I used that:

const store = new FileStore({ path: config.dirs.sessionDir, ttl: 86400s, retries: 0 });

As soon as I did that, my login form on login.html would log the user in (I could see the user object getting filled in). My code redirects from /login to home.html after a successful login. Every time, home.html was convinced there was no user and redirected back to login.html. If I would then manually try to go back to home.html in the browser, everything worked.

Changing the settings to: retries: 5, immediately fixed the problem. There appears to be a timing problem that requires a retry to always happen to check the session for the first request after a successful login.

[eavdmeer]

This may be related to #94