Bug 1126789

Summary:	[SNAPSHOT] : Snapshot creation failed on a volume where it was restored to a snapshot when glusterd was down on one the nodes
Product:	[Red Hat Storage] Red Hat Gluster Storage	Reporter:	senaik
Component:	snapshot	Assignee:	Avra Sengupta <asengupt>
Status:	CLOSED DEFERRED	QA Contact:	Anoop <annair>
Severity:	urgent	Docs Contact:
Priority:	unspecified
Version:	rhgs-3.0	CC:	asengupt, asriram, nsathyan, rhs-bugs, rjoseph, storage-qa-internal
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	SNAPSHOT
Fixed In Version:		Doc Type:	Known Issue
Doc Text:	If any node/glusterd is down when snapshot is restored then any subsequent snapshot creation fails. Workaround: Do not restore a snapshot, if node/glusterd is down.	Story Points:	---
Clone Of:
Clones:	1127087 (view as bug list)		Environment:
Last Closed:	2016-01-29 14:00:52 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1126813
Bug Blocks:	1087818, 1127087

Description senaik 2014-08-05 09:46:14 UTC

Description of problem:
=====================
Restored a volume to a particular snapshot when glusterd was down on one of the nodes. After this snapshot creation on the volume fails with "brick ops" failed message 

Version-Release number of selected component (if applicable):
============================================================
glusterfs 3.6.0.25


How reproducible:
=================
1/1

Steps to Reproduce:
===================
1.Create a 2x2 distribute-replicate volume (vol0)
2.Fuse and NFS mount the volume and create files and take a snapshot of the volume. 
3.Create some more files and take another snapshot 
4.Stop glusterd on one of the nodes (rhs-arch-srv2)
5.Restore the volume to one of the snapshots , restore is successful
6.Start the volume . Mount the volume and check for files 
7.Bring back glusterd on node 2 (rhs-arch-srv2)
7.Create another snapshot on the volume . It fails with brick ops failed on rhs-arch-srv2. 
Further snapshot creation on the volume fails with the same error 

Also on checking "gluster v i" info of vol0 was not present , it came up after sometime. 
 
Actual results:
===============
snapshot creation fails 


Expected results:


Additional info:

Comment 2 senaik 2014-08-05 10:19:25 UTC

sosreports : 
===========
http://rhsqe-repo.lab.eng.blr.redhat.com/sosreports/snapshots/1126789/

Comment 6 Shalaka 2014-09-20 16:53:38 UTC

Please review and sign-off edited doc text.

Comment 7 Avra Sengupta 2015-07-23 10:28:07 UTC

Doc text looks good.

Comment 10 Avra Sengupta 2016-01-29 14:00:52 UTC

This scenario will not occur as we no longer allow snapshots to be taken or restored even when a single brick is down.