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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