症状

Users will notice their login session unexpectedly changes to a different user when it should not be (the user as shown in the upper-right corner).

原因

There have been reported issues from users running JIRA behind Microsoft's Internet Information Services (IIS) with Output Caching enabled.

ソリューション

Disable Output Caching in IIS:

1. On the Site Home screen in IIS Manager double click on "Output Caching"
2. On the right side under Actions, click on Edit Feature Settings
3. Uncheck Enable Cache and Enable kernel cache
4. Click OK