[jira] [Created] (HBASE-28151) hbck -o should not allow bypassing pre transit check by default

["Viraj Jasani (Jira)" <ji...@apache.org>]

Viraj Jasani created HBASE-28151:
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             Summary: hbck -o should not allow bypassing pre transit check by default
                 Key: HBASE-28151
                 URL: https://issues.apache.org/jira/browse/HBASE-28151
             Project: HBase
          Issue Type: Improvement
            Reporter: Viraj Jasani


When operator uses hbck assigns or unassigns with "-o", the override will also skip pre transit checks. While this is one of the intentions with "-o", the primary purpose should still be to only unattach existing procedure from RegionStateNode so that newly scheduled assign proc can take exclusive region level lock.

We should restrict bypassing preTransitCheck by only providing it as site config.

If bypassing preTransitCheck is configured, only then any hbck "-o" should be allowed to bypass this check, otherwise by default they should go through the check.

 

It is important to keep "unset of the procedure from RegionStateNode" and "bypassing preTransitCheck" separate so that when the cluster state is bad, we don't explicitly deteriorate it further e.g. if a region was successfully split and now if operator performs "hbck assigns \{region} -o" and if it bypasses the transit check, master would bring the region online and it could compact store files and archive the store file which is referenced by daughter region. This would not allow daughter region to come online.

Let's introduce hbase site config to allow bypassing preTransitCheck, it should not be doable only by operator using hbck alone.



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