Adding 2 or more of certain items causes Activities portlet to fail

• Type: Regression Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.X EE
• Fix Version/s: 2.1.X CE, 2.1.0 EE GA3
• Component/s: Social Office Dashboard, Social Office Dashboard > Activities, Social Office Site > Activities
• Labels:
  • SO_6.1.20_PASS
  • SO_CE_UT
• Environment: Tomcat 7.0.40 + MySQL 5. Portal 6.1.20 EE GA2.; Plugins 6.1.x EE GIT ID: a49de4658558605dde6b9f0c20bf224d93075136.
• Flagged:
  Impediment
• Fix Priority: 5

Here are the steps to reproduce:

1. Add an SO site
2. Add 2 of any of the following: Documents, Tasks, Wiki Pages (not including the FrontPage), Calendar Events, Forum Threads
3. Go to the Activities portlet
4. Exceptions will appear and Activities will not be available

This bug only occurs with Portal 6.1.20 (not at HEAD).