magnuma3 opened a new pull request, #6514:
URL: https://github.com/apache/hive/pull/6514
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HIVE-29636
### What changes were proposed in this pull request?
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HiveServer2 WebUI's SslContextFactory is built once at startup, so renewing
the SSL keystore requires restarting HS2
Watch the keystore file with Hadoop's FileMonitoringTimerTask and call
SslContextFactory#reload(...) on mtime change. The daemon Timer is installed
when SSL is on and is cancelled in HttpServer#stop(). Reload failures are
logged and swallowed
Same pattern as HADOOP-16524, reusing its FileMonitoringTimerTask
### Why are the changes needed?
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Rotating WebUI SSL certificates currently requires an HS2 restart, which is
increasingly painful as certificate lifetimes shorten. Hadoop's HttpServer2
already solved this via HADOOP-16524.
### Does this PR introduce _any_ user-facing change?
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Yes — new opt-in ConfVar hive.server2.webui.keystore.reload.interval
(default 60s, 0 disables). When the keystore file changes, the running HS2
picks up the new certificate within the interval; no restart needed. No API or
schema changes.
### How was this patch tested?
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Added TestHttpServer
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