Web user account starts spamming FMS shortly after they're recorded as having logged off.

[Andrew Persons]

I have a persistent issue that's been occurring over the last few weeks.

• A single web user account (different accounts each time) will suddenly start flooding the server with remote calls referencing the same global calculation field, according to Top Call Statistics. It will continue doing this until the web server is restarted. FileMaker client users are unaffected (other than a bit of a slowdown).
• Our access table records each time that the user logged off shortly before this started, usually ~30 seconds.
• The field is a global calculation field that is a predicate for a relationship. However, the scripts and XML calls don't reference the field or the relationship that I can find.
• This has happened several times a week, sometimes multiple times per day. I haven't been able to reproduce the behavior, however.

Deployment details:

• Multi-machine deployment
• Windows Server 2012 R2
• Web server is IIS
• Host is virtual machines on robust hardware. FMS has 10 cores assigned to it and 12 GB RAM.

[Lee Smith]

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