The Job DSL plugin's jobDsl step is often failing for us with terse  one-line exceptions such as

ERROR: java.io.IOException: Failed to persist config.xml 

This makes it difficult to find errors where they may exist. For example, if a Job DSL script fails due to a sandboxing issue, there is no information on which specific call may have caused the rejected access, and would need intense debugging of the script (and any classes loaded through the workspace class loader, since we use that) to find and address. Any additional insight into how to investigate these issues would be appreciated.