Symptoms

Certain JIRA issue(s) do not load or are not accessible and you may get a "Page Unavailable" error. 

Diagnosis

• 'Page Unavailable' is displayed
• Wheel spins for a long time
• If you are seeing 'Page Unavailable', it's important to determine whether it's the entire application or just certain JIRA issue(s). 

Note: In some cases, the root cause is a direct result of excessive code data in the issue description and/or comment field. Therefore, you should consider refraining from adding excessive code, scripts, SQL, etc to issue comments. For such circumstances, place the data into a file, then add to the JIRA issue(s) as an attachment. 

Workaround

• Clear the cache on the web browser and/or disable extensions. You can easily do this if you are using Google Chrome by using 'Incognito' mode
• Try an alternative web browser
• Determine whether other users are having the same issue
• If possible, check to see if the issue happens on another network or computer
• Make sure you are using Supported Platforms
• Contact support and let them know you've already exhausted the above suggestions. Support can review your JIRA logs for errors and query JIRA issues for excessive comments or excessive descriptions, which quite often, is the root cause for said condition. If its determined that comments/descriptions data is excessive, support can remove comments/descriptions by converting to attachments, which are then associated with the issue(s) that would not load.