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https://issues.apache.org/jira/browse/HBASE-26267?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Elser resolved HBASE-26267.
--------------------------------
Hadoop Flags: Reviewed
Resolution: Fixed
Thanks for the reminders to merge this, Duo. Merged this to branch-2.4,
branch-2, and master.
> Master initialization fails if Master Region WAL dir is missing
> ---------------------------------------------------------------
>
> Key: HBASE-26267
> URL: https://issues.apache.org/jira/browse/HBASE-26267
> Project: HBase
> Issue Type: Improvement
> Components: master
> Affects Versions: 2.4.6
> Reporter: Josh Elser
> Assignee: Josh Elser
> Priority: Major
> Fix For: 2.5.0, 3.0.0-alpha-2, 2.4.9
>
>
> From a recent branch-2.4 build:
> {noformat}
> 2021-09-07 19:31:19,666 ERROR [master/localhost:16000:becomeActiveMaster]
> master.HMaster(159): ***** ABORTING master localhost,16000,1631057476442:
> Unhandled exception. Starting shutdown. *****
> java.io.FileNotFoundException: File
> hdfs://localhost:8020/hbase-2.4-wals/MasterData/WALs does not exist.
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.listStatusInternal(DistributedFileSystem.java:1059)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.access$1000(DistributedFileSystem.java:131)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$24.doCall(DistributedFileSystem.java:1119)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$24.doCall(DistributedFileSystem.java:1116)
> at
> org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.listStatus(DistributedFileSystem.java:1126)
> at
> org.apache.hadoop.hbase.master.region.MasterRegion.open(MasterRegion.java:226)
> at
> org.apache.hadoop.hbase.master.region.MasterRegion.create(MasterRegion.java:303)
> at
> org.apache.hadoop.hbase.master.region.MasterRegionFactory.create(MasterRegionFactory.java:104)
> at
> org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:839)
> at
> org.apache.hadoop.hbase.master.HMaster.startActiveMasterManager(HMaster.java:2189)
> at
> org.apache.hadoop.hbase.master.HMaster.lambda$run$0(HMaster.java:512)
> at java.lang.Thread.run(Thread.java:748)
> {noformat}
> If the WAL directory is missing but the Master Region already exists, we will
> try to list the contents of the Master Region's WAL directory which may or
> may not exist. If we simply check to make sure the directory exists and then
> the rest of the initialization code works as expected.
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