release/v20.07 - Fix(cleanup): Avoid truncating in vlog.Open on error (#1465)#1489
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jarifibrahim merged 1 commit intorelease/v2.2007from Aug 27, 2020
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* Fix(cleanup): Avoid truncating in value.Open on error The vlog.Open() function can return an error denoting that the open was unsuccessful but we have `db.cleanup` which will be called to stop all the running go routines in case badger couldn't start. The db.cleanup function calls vlog.Close() which will truncate the maxFid vlog file based on the vlog.writableLogOffset. The vlog.writableLogOffset was not being updated in case open failed. As a result of this, we will end up truncating the vlog file to lenght 0 if open fails. This PR fixes this by using vlog.stopDiscardStatFlush() instead of vlog.close. (cherry picked from commit ed3b219)
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Reviewed 2 of 2 files at r1.
Reviewable status:complete! all files reviewed, all discussions resolved (waiting on @manishrjain)
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The vlog.Open() function can return an error denoting that the open was
unsuccessful but we have
db.cleanupwhich will be called to stop allthe running go routines in case badger couldn't start. The db.cleanup
function calls vlog.Close() which will truncate the maxFid vlog file
based on the vlog.writableLogOffset. The vlog.writableLogOffset was not
being updated in case open failed. As a result of this, we will end up
truncating the vlog file to lenght 0 if open fails.
This PR fixes this by using vlog.stopDiscardStatFlush() instead of vlog.close.
(cherry picked from commit ed3b219)
This change is