Bug 1276638 - write serialization should be guaranteed for posix mandatory locks
write serialization should be guaranteed for posix mandatory locks
Status: NEW
Product: GlusterFS
Classification: Community
Component: locks (Show other bugs)
Unspecified Unspecified
unspecified Severity low
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Assigned To: bugs@gluster.org
: Triaged
Depends On:
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Reported: 2015-10-30 06:47 EDT by Raghavendra Talur
Modified: 2016-01-11 04:13 EST (History)
3 users (show)

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Doc Type: Bug Fix
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Description Raghavendra Talur 2015-10-30 06:47:20 EDT
Description of problem:

When a mandatory lock request arrives at the posix locks xlator, it should be sent success only when all the conflicting operations(like write) which were already STACK WOUND have been UNWOUND too.  If not, then in the rarest of the cases it may happen that a write from the client which had acquired the lock wins the race against the write which was WOUND but not UNWOUND there by causing loss of data guarantees.

How reproducible:
Very rare, but it a bug nevertheless.

Credits: Raghavendra Gowdappa explained the possibility of this bug.

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