Race condition when disabling a table leaves regions in transition
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Key: HBASE-2499
URL: https://issues.apache.org/jira/browse/HBASE-2499
Project: Hadoop HBase
Issue Type: Bug
Affects Versions: 0.20.3
Reporter: Jean-Daniel Cryans
Assignee: Jean-Daniel Cryans
Priority: Blocker
Fix For: 0.20.4, 0.21.0
A lot of people reported that weren't able to add/delete a column because only
some of the regions got the modification. I personally thought it was due to
the CME bug in the Master, but I'm able to easily reproduce on 0.20.4 on a 1800
regions table.
Since 0.20.3, we now call disableTable after every retry to make sure we don't
miss any region. This creates a race where while we scan .META. in
TableOperation, a region could be reported as closed after we scanned the row.
We end up processing it like if it was assigned and we put it back into
regionsInTransition. We need to either query .META. before processing each
region or make some more check to see if the region was closed.
This kills the RC in my book.
In the mean time, anyone getting this can restart their HBase and it will pick
up the change.
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