  Modern programming languages like Java require runtime systems to support the
implementation and deployment of software applications in diverse computing
platforms and operating systems. These runtime systems are normally developed
in GitHub-hosted repositories based on close collaboration between large
software companies (e.g., IBM, Microsoft) and OSS developers. However, despite
their popularity and broad usage; to the best of our knowledge, these
repositories have never been studied. We report an empirical study of around
118K issues from 34 runtime system repos in GitHub. We found that issues
regarding enhancement, test failure and bug are mostly posted on runtime system
repositories and solution related discussion are mostly present on issue
discussion. 82.69% issues in the runtime system repositories have been resolved
and 0.69% issues are ignored; median of issue close rate, ignore rate and
addressing time in these repositories are 76.1%, 2.2% and 58 days respectively.
82.65% issues are tagged with labels while only 28.30% issues have designated
assignees and 90.65% issues contain at least one comment; also presence of
these features in an issue report can affect issue closure. Based on the
findings, we offer six recommendat
