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By default, an IIS application pool (or “AppPool”) recycles on a regular time interval of 1740 minutes or 29 hours.

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1. Add IIS feature called. Application Initialization
   As of IIS 8 Application Initialization is part of the IIS feature set. For IIS 7 and 7.5 there's a separate download available via Web Platform Installer. Using IIS 8 Application Initialization is an optional install component in Windows or the Windows Server Role Manager:

   1. 

2. Open IIS MANAGER (command: inetmgr)

3. Go to Application Pool section

   1. right-click TFS4JIRA application pool (default name: TFS4JIRA Sync App Pool)

   2. choose ADVANCED SETTINGS

   3. please set: Start Mode to AlwaysRunning

   4. please set: Idle Time-out (minutes) to 0

   5. click OK to confirm changes

      

4. Expand Sites and Default Web SIte (please note: this is default TFS4JIRA installation site, you may have a different configuration)

5. Right-click TFS4JIRA application (default name: tfs-jira-synchronizer)

   1. go to MANAGE APPLICATION → ADVANCED SETTINGS

   2. please set: Preload Enabled to True

      

6. As a final step please restart your site (site where TFS4JIRA application is installed)

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As of IIS 8 Application Initialization is part of the IIS feature set. For IIS 7 and 7.5 there's a separate download available via Web Platform Installer. Using IIS 8 Application Initialization is an optional install component in Windows or the Windows Server Role Manager:

WORKAROUND (optional when above failed)

That situation where Synchronizer stops processing after application pool recycle is the standard behavior of IIS 7.0, not an error or issue. The site only comes into memory on first access and that usually takes longer than subsequent access.

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