Watching the logs on igniterealtime's Openfire, I see messages like this in warn.log
These messages aren't really useful as they provide no context.
Assigning to Guus, as he has done some SSL work and perhaps this issue is no more with 3.11/4.0 release.
I'm currently working on more changes, which are slowly morphing into a rewrite of the certificate management implementation that we have. I'll take this into account.
Guus, can we close this issue as resolved in 4.0?
Yes. Very elaborate stack traces are now logged for most cases. New issues can be opened if we run into more issues.