[jira] [Created] (PHOENIX-3684) ConnectionQueryServices connection leak on principal with "_HOST"

["Josh Elser (JIRA)" <ji...@apache.org>]

Josh Elser created PHOENIX-3684:
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             Summary: ConnectionQueryServices connection leak on principal with "_HOST"
                 Key: PHOENIX-3684
                 URL: https://issues.apache.org/jira/browse/PHOENIX-3684
             Project: Phoenix
          Issue Type: Bug
            Reporter: Arpit Gupta
            Assignee: Josh Elser
            Priority: Blocker
             Fix For: 4.9.1, 4.10.0


Through some internal testing, we found that Ambari's use of Phoenix to host metrics data was leaking ConnectionQueryServices (and thus HConnections and ZK connections), ultimately running into ZK's rate limiting maxClientCnxns.

After a bit of digging around (and revisiting the old issues around this topic PHOENIX-3607, PHOENIX-3611, etc), I finally realized that the logic in ConnectionInfo was simply not correctly handling the {{_HOST}} special string in the principal (that UGI will replace with the FQDN for the current host).

This resulted in Phoenix repeatedly re-logging in the user when they created a new Connection instead of using the UGI current user, leaking another set of connections.



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