STRM-2272 might cause a timeout with a message saying "The activity source for 'JIRA' was slow to respond and isn't included." and "No activity was found" where the data should be when trying to view Activity Stream gadgets. This issue tracks the upgrade of JIRA to use a more recent version of Activity Streams (5.4.13) in which the issue was fixed.
This issue can be replicated in environments where issues have very long histories and many records are returned.
The Activity Stream is expected to show the stream of activities.
The Activity Stream shows an error reporting no activities, or the slow to respond message.
For more information, please see: STRM-2272 and JIRA Activity Stream returns One or more activity sources were slow to respond and are not included.