Ever since I tried to set up confluence (and failed) JIRA has been occasionally crashing. Each time I just restarted JIRA and it seemed to be working fine. But today after restarting JIRA it crashed again and froze the whole server (something about being out of RAM i think). I rebooted the server and JIRA started, but all the changes made in JIRA(issues, comments, etc.) for the last five days have been lost.
We tried rolling back the server to a snapshot from yesterday and also the day before yesterday, but the data is still gone!
Is the data lost?
Why did this happen?
How can i prevent this from happening in the future?