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Backport "HBASE-30473 Expose Master switch states as numeric metrics (#8758)" to branch-2.6 - #8782
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Signed-off-by: Nihal Jain <nihaljain@apache.org> Signed-off-by: Xiao Liu <liuxiaocs@apache.org>
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https://issues.apache.org/jira/browse/HBASE-30473
Backport of #8758 to
branch-2.6.Preserves all nine gauges, including
rpcThrottleEnabled. This branch already includes HBASE-30409, so the RPC throttle gauge reads existing in-memory state.The metrics implementation stays in
hbase-hadoop2-compat. Tests use the existing 2.x APIs. Website documentation stays on master.Validation: full Maven build and 16 affected tests passed, with no failures, errors, or skips. Java 11 with Hadoop 3 profile.