In average our JIRA application down every 3 months. Today it down again. In the middle of business hour suddenly JIRA down. Everyone is getting "can't establish connection" error on browser.
JIRA, Confluence and Fisheye installed on same server (win2008R2) and we checked only JIRA is down.
In order to resume the service asap, we tried to restart the JIRA windows service (the status was "started" when it is down). But fail. So we kill the process (tomcat8.exe.x64) and start the service. It works now.
During the downtime, there is no log in the log file.
My gut feeling is the tomcat have problem but I have no proof.
May I have your advice how should we troulbeshoot or work around this situation?