Take a full XML export from the "backup and import" admin.
There are other methods of exporting data from Jira, but that's the only one that will really get everything, the others are limited.
You might get a more useful response if you explained why you want to do this though?
If you want the data in an an immediately useful format you could try the Intelligent Reports plugin. You design the report in Microsoft Word, and select the data you want to fill in, in this case issues and comments, with the simple point and click interface. There is no scripting or API to learn.
In the past, Portfolio for Jira required a high degree of detail–foresight that was unrealistic for many businesses to have–in order to produce a reliable long-term roadmap. We're tur...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs