Wellington Chevreuil created HBASE-28953:
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Summary: Prefetch thread shouldn't run for master store
Key: HBASE-28953
URL: https://issues.apache.org/jira/browse/HBASE-28953
Project: HBase
Issue Type: Bug
Reporter: Wellington Chevreuil
Assignee: Wellington Chevreuil
The master store is hosted on Master processes. Since masters don't have a
BlockCache, we shouldn't run a prefetch thread at all, when opening the master
store region.
Currently, this is causing a NoSuchElementException to be logged in master
logs, which although harmless, can be confusing for operators:
{noformat}
2024-10-23 15:23:29,236 WARN org.apache.hadoop.hbase.io.hfile.HFileReaderImpl:
Prefetch
path=s3a://odx-qe-bucket/cc-odx-coy6zg/cod-udzhubgp5l5k/hbase/MasterData/data/master/store/1595e783b53d99cd5eef43b6debb2682/proc/336a510d9f9a472c9e2a8f3e00352e3b,
offset=0, end=82012
java.util.NoSuchElementException: No value present
at java.base/java.util.Optional.get(Optional.java:143)
at
org.apache.hadoop.hbase.io.hfile.HFilePreadReader$1.run(HFilePreadReader.java:73)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecute {noformat}
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