Possible memory issue due to LDAP plugin

[gregbook]

Hey!

Recently updated our installation of verdaccio and we start seeing an increase of memory over time until verdaccio is OOM.

We were previously running:

"verdaccio": "^3.8.2",
"verdaccio-ldap": "^2.3.0

We are now running:

"verdaccio": "^4.8.1",
"verdaccio-audit": "^9.7.3",
"verdaccio-ldap": "^4.2.0"

I could reproduce the OOM by querying with siege the /-/whoami endpoint with an authenticated user. Requests to our LDAP would work fine until OOM occurred. I suspect (but not sure) that the LDAP plugin could be at play here...

I turned on LDAP auth cache and it helped a bit but OOM ended up happening again over time.

Possibly related? ldapjs/node-ldapjs#605

Environment info:

• Runs in kubernetes
• Use node 12

If you need more information please let me know.
Thanks!