Issue Summary

Making a Call to get the Issue details having attachments(missing/broken), should display actual error message on not generic "Internal Server Error".

Steps to Reproduce

1. Have an issue with attachment missing
2. Do a get call https://jira-hostrest/api/latest/issue/LIME-5359

Results in response:

{"errorMessages":["Internal server error"],"errors":{}}

Expected Results

The response should contain the  actual cause 

{"errorMessages":["Internal server error"],"errors":{files/attachments missing}}

Actual Results

The below exception is thrown in the atlassian.log file:

Caused by: java.lang.RuntimeException: Provider for class javax.xml.stream.XMLInputFactory cannot be created
at java.xml/javax.xml.stream.FactoryFinder.findServiceProvider(FactoryFinder.java:363)
... 416 more
Caused by: java.util.ServiceConfigurationError: javax.xml.stream.XMLInputFactory: Provider com.ctc.wstx.stax.WstxInputFactory not found
at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:589)

Workaround

Ensure that attachments are synced and available