The only thing that you would need to make sure is that your OS is following the guides to resolve this issue. On application side, there should be no issues other than objects being created on the same second which I don't think will cause an issue.
Other views are of course welcomed.
Dear Atlassian Support
Could you please advise how the JIRA will be impacted (major or minor) due to the leap second on coming 30 Jun if our JIRA server Linux version is OL-220.127.116.11 kernel-18.104.22.1689.11.1.el6.x86_64 which is safe from the leap second?
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