Java EE (Java Enterprise Edition) General Discussion

Hi All,
I am having an intermittent problem with Struts Bean Message tag. I have a custom message resources object, that reads messages from a database. I therefore have a factory that returns the custom message resources object.

My problem is, that intermittantly I get a problem where the error message "Missing message for key "XXXX" is displayed. I have no idea why this should occur. I have the same application running on two identical web servers, and today it is working on one, and failing intermittantly on the other.

Has anyone come across similar problems when using custom message resources?