Jonathan Hsieh created HBASE-7245:
-------------------------------------
Summary: Recovery on failed restore.
Key: HBASE-7245
URL: https://issues.apache.org/jira/browse/HBASE-7245
Project: HBase
Issue Type: Sub-task
Reporter: Jonathan Hsieh
Restore will do updates to the file system and to meta. it seems that an
inopportune failure before meta is completely updated could result in an
inconsistent state that would require hbck to fix.
We should define what the semantics are for recovering from this. Some
suggestions:
1) Fail Forward (see some log saying restore's meta edits not completed, then
gather information necessary to build it all from fs, and complete meta edits.).
2) Fail backwards (see some log saying restore's meta edits not completed,
delete incomplete snapshot region entries from meta.)
I think I prefer 1 -- if two processes end somehow updating (somehow the
original master didn't die, and a new one started up) they would be idempotent.
If we used 2, we could still have a race and still be in a bad place.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
