[HBASE-23596] HBCKServerCrashProcedure can double assign - ASF JIRA

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Details

Type: Bug
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 3.0.0-alpha-1, 2.3.0, 2.2.3
Component/s: proc-v2
Labels:
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Release Note:

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Makes it so the recently added HBCKServerCrashProcedure -- the SCP that gets invoked when an operator schedules an SCP via hbck2 scheduleRecoveries command -- now works the same as SCP EXCEPT if master knows nothing of the scheduled servername. In this latter case, HBCKSCP will do a full scan of hbase:meta looking for instances of the passed servername. If any found it will attempt cleanup of hbase:meta references by reassigning any found OPEN or OPENING and by closing any in CLOSING state.

Used to fix instances of what the 'HBCK Report' page shows as 'Unknown Servers'.

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Makes it so the recently added HBCKServerCrashProcedure -- the SCP that gets invoked when an operator schedules an SCP via hbck2 scheduleRecoveries command -- now works the same as SCP EXCEPT if master knows nothing of the scheduled servername. In this latter case, HBCKSCP will do a full scan of hbase:meta looking for instances of the passed servername. If any found it will attempt cleanup of hbase:meta references by reassigning any found OPEN or OPENING and by closing any in CLOSING state. Used to fix instances of what the 'HBCK Report' page shows as 'Unknown Servers'.

Description

The new SCP that does SCP plus cleanup 'Unknown Servers' with mentions in hbase:meta added by the below can make for double assignments.

commit c238891a26734e1e4276b6b1677a58cf83de5dc4
Author: stack <stack@apache.org>
Date:   Wed Nov 13 22:36:26 2019 -0800

    HBASE-23282 HBCKServerCrashProcedure for 'Unknown Servers'