HOP-4246

[uraychang]

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Following this checklist to help us incorporate your contribution quickly and easily:

• Make sure there is a JIRA issue filed
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  require a JIRA issue. Your pull request should address just this issue, without pulling in other changes.
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• Format the pull request title like [HOP-XXX] - Fixes bug in SessionManager,
  where you replace HOP-XXX with the appropriate JIRA issue. Best practice
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• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
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• If you have a group of commits related to the same change, please squash your commits into one and force push your branch using git rebase -i.

Trivial changes like typos do not require a JIRA issue (javadoc, comments...).
In this case, just format the pull request title like (DOC) - Add javadoc in SessionManager.

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[mattcasters]

Nice code cleanup

[uraychang]

Nice code cleanup

thanks, Matt