Investigate and reduce the number of Errors, Exception, and SEVERE events from server.log

[kcondon]

SEVERE events are ones whose level is SEVERE according to Payara.
Errors and Exceptions may be WARNING or INFO level but nonetheless contains important info.

The search strings are "SEVERE" "Error" and "Exception"

[PaulBoon]

Yes, every time when looking into the server.log I have to take a deep breath ...
see my issue: #5749

[eunices]

Hello, just to add onto this issue.

Recently we also noticed EZIDException in server.log. Also mentioned in https://groups.google.com/g/dataverse-community/c/hge7q5xsjh4/m/NMJB3K6YAgAJ. It isn't fatal according to @qqmyers. Could consider removing the severe log for DOIEZIdServiceBean.java especially since EZID is no longer used.

[SEVERE] [] [edu.harvard.iq.dvn.core.index.DOIEZIdServiceBean] [tid: _ThreadID=65 _ThreadName=RunLevelControllerThre
  Other Error on ezidService.login(USERNAME, PASSWORD) - not EZIDException ]] 

[pdurbin]

Let's open more targeted issues, please. Smaller chunks.