(A)
Exception message appears when a JIRA issue is created with a long comment

Exception: com.opensymphony.workflow.InternalWorkflowException: An unknown exception occured while executing FunctionProvider: com.atlassian.jira.workflow.function.issue.UpdateIssueFieldFunction

(B)
When I create the issue first, then try to add the long comment, I get to view the long comment with this information at the bottom of the page

SQL Exception while setting value: (Data size bigger than max size for this type: 5540)

This should really be handled by the form validation and displays the correct error message to the form screen instead of the exception in example (A), or at the bottom of a long text page in example (B).