JIRA issues macro from multiple instances have errors when context paths overlap

Summary

In Confluence when there are multiple linked JIRA instances and the URL context paths are substrings of each other (e.g. http://machine.company.com.au/jira1 and http://machine.company.com.au/jira12), pasting in a JIRA URL from the longer URL (e.g. /jira12) onto a page does not display correctly on save.

Environment

Confluence 5.8.9 and both JIRA 6.4.11 instances:

• are accessed through a reverse proxy
• have the same domain name and port for their application links
• are accessed through context paths

Steps to Reproduce

1. Set up one Confluence instance, and 2 separate JIRA instances listening on different ports, e.g.
   • http://machine.company.com.au:8090/confluence
   • http://machine.company.com.au:8080/jira1
   • http://machine.company.com.au:8081/jira12
2. Set up a reverse proxy such that
   http://machine.company.com.au/confluence points to http://machine.company.com.au:8090/confluence
   http://machine.company.com.au/jira1 points to http://machine.company.com.au:8080/jira1
   http://machine.company.com.au/jira12 points to http://machine.company.com.au:8081/jira12
3. In Confluence, go to General Configuration > Application Links
4. Add application link to http://machine.company.com.au/jira1
5. Add application link to http://machine.company.com.au/jira12
6. Make http://machine.company.com.au/jira1 Primary if not already
7. Create a issue in both JIRA instances using different keys
   • http://machine.company.com.au/jira1/browse/ONE-1
   • http://machine.company.com.au/jira12/browse/TWO-1
8. Create a page in Confluence and paste in the URL for each JIRA Issue
9. Save the page

Expected Results

Both JIRA issues display correctly as

ONE-1 - this is jira1 TO DO
TWO-1 - this is jira12 TO DO

Actual Results

The page shows an error for http://machine.company.com.au/jira12/browse/TWO-1

Workaround

One work around per issue macro is

1. Edit the page
2. On the broken JIRA issue, click edit
3. From the dropdown for the JIRA instance list, pick the correct instance the issue is on
4. Click the search button to location to issue
5. Click Insert

A more permanent workaround, if there are only 2 JIRA instances that have a shared URL

1. Go to General Configuration > Application Links
2. Make the longer URL, here http://machine.company.com.au/jira12 Primary