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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