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https://issues.apache.org/jira/browse/HBASE-3028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12914336#action_12914336
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stack commented on HBASE-3028:
------------------------------
Did some cluster testing. When it first ran, it did a bunch of this:
{code}
2010-09-24 05:29:33,011 INFO org.apache.hadoop.hbase.catalog.MetaEditor:
Deleted daughter
usertable,user992373275,1285090830082.d821675081aebe369b1fb9c11d48b012.
reference splitA from
usertable,user992373275,1285019557053.4ae8a9836d6ba0e97e6017547bac9e6c. .META.
2010-09-24 05:29:33,014 INFO org.apache.hadoop.hbase.catalog.MetaEditor:
Deleted daughter
usertable,user996181626,1285090830082.77acffdf0fbb0128ef6a4afd800906ab.
reference splitB from
usertable,user992373275,1285019557053.4ae8a9836d6ba0e97e6017547bac9e6c. .META.
2010-09-24 05:29:33,014 INFO org.apache.hadoop.hbase.master.CatalogJanitor:
Deleting region
usertable,user992373275,1285019557053.4ae8a9836d6ba0e97e6017547bac9e6c. because
daughter splits no longer hold references
2010-09-24 05:29:33,014 DEBUG org.apache.hadoop.hbase.regionserver.HRegion:
DELETING region
hdfs://sv2borg180:20000/hbase/usertable/4ae8a9836d6ba0e97e6017547bac9e6c
2010-09-24 05:29:33,033 INFO org.apache.hadoop.hbase.catalog.MetaEditor:
Deleted region
usertable,user992373275,1285019557053.4ae8a9836d6ba0e97e6017547bac9e6c. from
META
2010-09-24 05:29:33,033 INFO org.apache.hadoop.hbase.master.CatalogJanitor:
Scanned 1089 catalog row(s) and gc'd 375 unreferenced parent region(s)
{code}
I let it run a while. Checked table is wholesome still and it passes.
Going to commit.
> No basescanner means no GC'ing of split, offlined parent regions
> ----------------------------------------------------------------
>
> Key: HBASE-3028
> URL: https://issues.apache.org/jira/browse/HBASE-3028
> Project: HBase
> Issue Type: Bug
> Components: master
> Reporter: stack
> Fix For: 0.90.0
>
> Attachments: 3028-v2.txt, 3028-v4.txt, 3028.txt
>
>
> I need to add back cleanup of split parents probably as a Chore in master.
> Can use new MetaReader code.
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