XML descriptor gets broken with Software Project

Summary

Jira default workflow generates corrupted descriptor for Software Project.

Environment

• JIRA Software 7.6.0-EAP01
• JIRA Agile 6.7.16

Steps to Reproduce

1. Create a Software Project (Any of Scrum, Kanban, Basic)
2. Edit its workflow and select Post Functions
   

Expected Results

Transitions are correctly rendered.

Actual Results

Transitions get corrupted. However, no error or warning occur. This corruption also happens to copied workflow from the original generated one.

Notes

Descriptor is formatted by valid XML. However, it contains redundant line break in XML attributes like:

<arg name="class.name">com.atlassian.jira.workflow.function.event.FireIssueEventFunction
              </arg>

E.g. Here's a whole record: 1512632770_workflow.csv from

select * from jiraworkflows where workflowname id = 10200

It's still not sure which is the problem injecting line break itself or parser unavailability for a line break.

Workaround

For Jira administrator:

• If you need to edit the generated workflow, create your own workflow instead of editing or copying the generated workflow

For system administrator:

1. Stop JIRA
2. Make sure to backup data just in case
3. Fix the descriptor
   • For instance:

     $ W_ID="10200"
     $ psql ... -d __DB_NAME__ -c "Copy (select descriptor from jiraworkflows where id = ${W_ID}) To STDOUT;" > descriptor_${W_ID}.xml
     # Edit the xml file (Remove '\n' and the redundant line breaks)
     $ psql ... -c "update jiraworkflows set descriptor = '$(cat descriptor_${W_ID}.xml)' where id = ${W_ID}" __DB_NAME__
     

4. Start JIRA
5. Verify the affected workflow is fixed (Discard the draft workflow if exists)