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https://issues.apache.org/jira/browse/HIVE-26509?focusedWorklogId=812317&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-812317
]
ASF GitHub Bot logged work on HIVE-26509:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 27/Sep/22 02:31
Start Date: 27/Sep/22 02:31
Worklog Time Spent: 10m
Work Description: dengzhhu653 commented on code in PR #3567:
URL: https://github.com/apache/hive/pull/3567#discussion_r980672152
##########
itests/hive-unit/src/test/java/org/apache/hadoop/hive/metastore/TestMetastoreHousekeepingNonLeader.java:
##########
@@ -58,7 +58,8 @@ public void testHouseKeepingThreadExistence() throws
Exception {
if (entry.getValue()) {
LOG.info("Thread found for " + entry.getKey().getSimpleName());
}
- Assert.assertTrue("No thread found for " +
entry.getKey().getSimpleName(), entry.getValue());
+ // Worker now runs on a leader hms
+ // Assert.assertTrue("No thread found for " +
entry.getKey().getSimpleName(), entry.getValue());
Review Comment:
sure
Issue Time Tracking
-------------------
Worklog Id: (was: 812317)
Time Spent: 2.5h (was: 2h 20m)
> Introduce dynamic leader election in HMS
> ----------------------------------------
>
> Key: HIVE-26509
> URL: https://issues.apache.org/jira/browse/HIVE-26509
> Project: Hive
> Issue Type: New Feature
> Components: Standalone Metastore
> Reporter: Zhihua Deng
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> From HIVE-21841 we have a leader HMS selected by configuring
> metastore.housekeeping.leader.hostname on startup. This approach saves us
> from running duplicated HMS's housekeeping tasks cluster-wide.
> In this jira, we introduce another dynamic leader election: adopt hive lock
> to implement the leader election. Once a HMS owns the lock, then it becomes
> the leader, carries out the housekeeping tasks, and sends heartbeats to renew
> the lock before timeout. If the leader fails to reclaim the lock, then stops
> the already started tasks if it has, the electing event is audited. We can
> achieve a more dynamic leader when the original goes down or in the public
> cloud without well configured property, and reduce the leader’s burdens by
> running these tasks among different leaders.
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