yes, i know, those messages are shown here in the server control panel, this is not a problem with server workings.
i need to add a simple modification to avoid those messages, i sorted out other things here, i'll do it shortly and get here back when it has been done.
i added a little code and restarted the server with the changes, but the problem didn't happen for two weeks or so, when it does (or when there are signs without this actually happening) then i can take effective measures to prevent it from reoccuring.
no problem with the server itself, in short it is a kind of inadvertent user abuse.
based on my observations the problem has been taken care of as to prior external causes, i'll add more refined code later as a matter of precaution, need a client release since need to return new error message in a certain case to prevent such an issue.
i did some more work on the topic as i planned, while i'm writing this - the server is being restarted with more changes, i have now much better understanding of how to deal with the issue at the root.