Is it possible to create a JQL query that will show bugs linked to tests that are part of a test set

[Kit Timmis]

I'm trying to create a filter that will only show me my projects bugs that are only linked to tests within a certain test set 

[Vickey Palzor Lepcha]

I hope you did not miss the jdbc driver - that is a very well known issue during DB connectivity.

[Andy Heinzer]

I'd like to look at the log file this error references.  You can find this in the $JIRAHOME/log/atlassian-jira.log file.   I would expect this log will have a more complete stacktrace that provides more clues on this problem.

On a side note, using MySQL with Jira is possible, but it has an additional step that using other supported databases do not have with jira: You have to manually download the JDBC Connector/J 5.1.x version from MySQL's site and extract the .jar file there into the $JIRAINSTALL/lib/ folder.   I suspect you did this already, or otherwise you would not have been able to get this far, but I have seen other users trying to use the version 8.x version of that driver and have other problems with Jira.

But either way, I'd be interested to see you log file from startup through to this error.  Perhaps you can post this file to a sharing site like dropbox or google drive so we can take a look at the details in the logs.