Hello All,
Requirement: JIRA 3.3 to JIRA 7.x. But during upgrate i figured out that it is not possible to directly switch from 3.x to 7.x. First need to upgrade to JIRA 4.4.5 and then to JIRA 7.x.
I took back up of xml as zip file and trying to import to JIRA 4.4.5 (TRIAL version) and faced JVM memory out of space issue. Later in services i updated to 512 as max. Then tried to import and it has completed till 11% and failed with unknown error.