  Organisations use issue tracking systems (ITSs) to track and document their
projects' work in units called issues. This style of documentation encourages
evolutionary refinement, as each issue can be independently improved, commented
on, linked to other issues, and progressed through the organisational workflow.
Commonly studied ITSs so far include GitHub, GitLab, and Bugzilla, while Jira,
one of the most popular ITS in practice with a wealth of additional
information, has yet to receive similar attention. Unfortunately, diverse
public Jira datasets are rare, likely due to the difficulty in finding and
accessing these repositories. With this paper, we release a dataset of 16
public Jiras with 1822 projects, spanning 2.7 million issues with a combined
total of 32 million changes, 9 million comments, and 1 million issue links. We
believe this Jira dataset will lead to many fruitful research projects
investigating issue evolution, issue linking, cross-project analysis, as well
as cross-tool analysis when combined with existing well-studied ITS datasets.
