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https://issues.apache.org/jira/browse/HBASE-29644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18029397#comment-18029397
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Anuj Sharma commented on HBASE-29644:
-------------------------------------
We need to block the _preCompactSelection()_ function when the cluster is in
read-only mode to avoid user table getting compacted.
> Fix the compactions being triggered on the replica cluster
> ----------------------------------------------------------
>
> Key: HBASE-29644
> URL: https://issues.apache.org/jira/browse/HBASE-29644
> Project: HBase
> Issue Type: Sub-task
> Reporter: Shanmukha Haripriya Kota
> Assignee: Anuj Sharma
> Priority: Critical
>
> Minor compactions are being triggered after opening a new region on the read
> replica cluster. Investigate and fix the ReadOnlyController.
> {code:java}
> 2025-10-06T22:16:13,552 INFO
> [RS_OPEN_REGION-regionserver/hbase-docker-2:16020-0]
> handler.AssignRegionHandler: Opened
> t1,,1759788781868.60e54b8e10b9e2655bf1b2aca04e9a2f.
> 2025-10-06T22:16:13,556 INFO
> [regionserver/hbase-docker-2:16020-shortCompactions-0] regionserver.HRegion:
> Starting compaction of 60e54b8e10b9e2655bf1b2aca04e9a2f/cf1 in
> t1,,1759788781868.60e54b8e10b9e2655bf1b2aca04e9a2f.
> 2025-10-06T22:16:13,557 INFO
> [regionserver/hbase-docker-2:16020-shortCompactions-0] regionserver.HStore:
> Starting compaction of
> [file:/data-store/hbase/data/default/t1/60e54b8e10b9e2655bf1b2aca04e9a2f/cf1/3dc8900fdcf04883a6f03700cec86b92,
>
> file:/data-store/hbase/data/default/t1/60e54b8e10b9e2655bf1b2aca04e9a2f/cf1/d136f2f138964f7f80732492995c55fe,
>
> file:/data-store/hbase/data/default/t1/60e54b8e10b9e2655bf1b2aca04e9a2f/cf1/08d326c0525b44bb8d3745baf4932c02,
>
> file:/data-store/hbase/data/default/t1/60e54b8e10b9e2655bf1b2aca04e9a2f/cf1/bac69e5664b5456ca787ca31e22e6b2d]
> into
> tmpdir=file:/data-store/hbase/data/default/t1/60e54b8e10b9e2655bf1b2aca04e9a2f/.tmp,
> totalSize=19.4 K
> 2025-10-06T22:16:13,568 INFO [HBase-Metrics2-1]
> impl.GlobalMetricRegistriesAdapter: Registering
> RegionServer,sub=TableRequests_Namespace_default_table_t1 Metrics about
> Tables on a single HBase RegionServer
> 2025-10-06T22:16:13,657 INFO
> [regionserver/hbase-docker-2:16020-shortCompactions-0]
> throttle.PressureAwareThroughputController:
> 60e54b8e10b9e2655bf1b2aca04e9a2f#cf1#compaction#0 average throughput is 0.06
> MB/second, slept 0 time(s) and total slept time is 0 ms. 0 active operations
> remaining, total limit is 50.00 MB/second
> 2025-10-06T22:16:13,771 INFO
> [regionserver/hbase-docker-2:16020-shortCompactions-0] regionserver.HStore:
> Completed compaction of 4 (all) file(s) in
> 60e54b8e10b9e2655bf1b2aca04e9a2f/cf1 of 60e54b8e10b9e2655bf1b2aca04e9a2f into
> c9189f98667f48a2a8fad2bd9d68187b(size=5.1 K), total size for store is 5.1 K.
> This selection was in queue for 0sec, and took 0sec to execute.
> 2025-10-06T22:16:13,774 INFO
> [regionserver/hbase-docker-2:16020-shortCompactions-0]
> regionserver.CompactSplit: Completed compaction
> region=t1,,1759788781868.60e54b8e10b9e2655bf1b2aca04e9a2f.,
> storeName=60e54b8e10b9e2655bf1b2aca04e9a2f/cf1, priority=12,
> startTime=1759788973546; duration=0sec
> 2025-10-06T22:16:45,074 INFO [LruBlockCacheStatsExecutor]
> hfile.LruBlockCache: totalSize=786.40 MB, usedSize=590.80 KB, freeSize=785.82
> MB, max=786.40 MB, blockCount=0, accesses=4, hits=0, hitRatio=0,
> cachingAccesses=0, cachingHits=0, cachingHitsRatio=0,evictions=29, evicted=0,
> evictedPerRun=0.0 {code}
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