Deleting WSRP Admin consumer with a portlet causes error

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 DXP SP2, Master
• Fix Version/s: 7.0.X, 7.1.0 M2, 7.1.X, Master
• Component/s: WSRP
• Labels:
  • QA-V
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 5
• Git Pull Request: https://github.com/mikemanyoung/liferay-portal/pull/472

Steps to reproduce:

1. Navigate to Control Panel -> Configuration -> WSRP Admin
2. Select Producer tab
3. Click Add Producer
4. Select a portlet (Ex. Currency Converter)
5. Save
6. Copy Producer URL
7. Select Consumer tab
8. Add a consumer using the Producer URL
9. Expand kebab menu to select Manage Portlets
10. Click Add Portlet
11. Name and select Currency Converter portlet
12. Save
13. Navigate back to WSRP Admin Consumers page
14. Delete new consumer

Expected Result:
Consumer is deleted.

Actual Result:
An error occurs. When the page is refreshed, the page doesn't load with a message saying it isn't redirecting properly. When navigating to the home page using localhost:8080, the user can only see the home page and can't navigate anywhere else in portal. The error does not occur when deleting a consumer that doesn't have a portlet added (Steps 9-12).

Reproduced on:
Tomcat 8.0.32 + MySQL 5.6.
Portal master GIT ID: 4a9e114ad35116d9ca2042e9c64d5c257017d81c