After upgrading from Jira v6.4.14 to Jira Core v7.4.1, the main URL for JIRA returns the following message:
Oops, you've found a dead link.
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Atlassian JIRA Project Management Software (v7.4.1#74003-sha1:03b9948)
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An analysis directly on the machine with the links browser shows that jira has lost it's base URL - JIRA is supposed to run from /jira, but instead now runs from /. Is there a mechanism to upgrade jira without jira trashing it's configuration?