1230513 – Disperse volume : data corruption with appending writes in 8+4 config

Bug 1230513 - Disperse volume : data corruption with appending writes in 8+4 config

Summary: Disperse volume : data corruption with appending writes in 8+4 config

Keywords:
Status:	CLOSED ERRATA
Alias:	None
Product:	Red Hat Gluster Storage
Classification:	Red Hat Storage
Component:	disperse
Sub Component:
Version:	rhgs-3.1
Hardware:	Unspecified
OS:	Unspecified
Priority:	medium
Severity:	unspecified
Target Milestone:	---
Target Release:	RHGS 3.1.0
Assignee:	Pranith Kumar K
QA Contact:	Bhaskarakiran
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:	1202842 1223636 1232678 1243647
TreeView+	depends on / blocked

Reported:	2015-06-11 05:39 UTC by Bhaskarakiran
Modified:	2016-11-23 23:12 UTC (History)
CC List:	10 users (show)
Fixed In Version:	glusterfs-3.7.1-10
Doc Type:	Bug Fix
Doc Text:
Clone Of:
Clones:	1232678 (view as bug list)
Environment:
Last Closed:	2015-07-29 05:01:32 UTC
Embargoed:
Dependent Products:

Attachments	(Terms of Use)
fuse mount log (5.83 MB, application/zip) 2015-06-29 12:04 UTC, Bhaskarakiran	no flags	Details
View All

Links
System	ID	Private	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2015:1495	0	normal	SHIPPED_LIVE	Important: Red Hat Gluster Storage 3.1 update	2015-07-29 08:26:26 UTC

Description Bhaskarakiran 2015-06-11 05:39:59 UTC

Description of problem:
=======================

In a 8+4 config, if 5th brick is taken down and brought up with gluster v start force, md5sum for the files differ on the same mount. If the client mount is re-mounted and contents are read, then it matches.

Version-Release number of selected component (if applicable):
==============================================================
[root@transformers ~]# gluster --version
glusterfs 3.7.1 built on Jun  9 2015 02:31:56
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General Public License.
[root@transformers ~]# 


How reproducible:
=================
100%


Steps to Reproduce:
1. Create 8+4 volume and fuse mount on the client
2. Create files with varying block sizes and random data
4. Calculate md5sum of all the files
3. Take down 1 to 5 bricks one after another and compute md5sum of files every time the brick is down
4. Compare md5sum of files before taking down the brick and after taking down the bricks.
5. 

Actual results:
===============
Corruption

Expected results: 
=================
On the same mount, md5sum should match

Additional info:

Comment 6 Bhaskarakiran 2015-06-29 12:02:37 UTC

Reading the file after appending the data to it has corrupted on nfs mount and gets stuck. Below is the snippet.

This is on 3.7.1.-6 build.

b20e20d1f273565435cc8dd488254541  testfile.1
139e3c8fac34574c2a9b5699cd891fd5  testfile.2
55454b4d924624be149eed1a1dd01d91  testfile.3
761e8f78753eb11b3c262c8c84a20b1e  testfile.4
619186a81e03f1508a5cb311a099a417  testfile.5
facd689c06bc7bd0467d973ac43d9f49  testfile.6
e31865515095b8f607cb0eb62146e630  testfile.7
8296d77485111597289629506cf46893  testfile.8
bd3448e33d9d46ccd7fc27d60945be5a  testfile.9
3cb341bb3ccd13d443a8d0dbf5625e4d  testfile.10
12689e0e258b4a2d424bbd3a7c5810f9  testfile.11
42c4dd145902d956061162989d4d5d48  testfile.12
713e1b247d75a4ee905166cd1c4e215f  testfile.13
d5e0fdbcc162fd7325136cf1dfdfba52  testfile.14
0faf9fe76d4a705d0c93afc5a7f638dc  testfile.15
9c0f6471e92bf5bfb49b25978621c261  testfile.16
21b6ae186690da865cf097e253ef1bb7  testfile.17
d037abe0430fa863af1897cfecf72a01  testfile.18
d51171b897e52033f6e6da^KT^K9w(aA^A^P^\'h09^U^Qw^X^A     MLy^QSb%?[M^PF^W^GpI^]g9^?6)^DWneiQ^FC^RI^D^TD^UO^OESC^]^TwL09(okN^O&^E^Z^S^][^A                !C;(z15d1'ek^@DA^E^ZWESC^Q^ZWXTA^N>pNTPZ^K_^WyUJM^DVZ^MI[e(^RVLt.&n^P yo<$7s^GA*^X^E^RQIY^Sfy:^EteeKr^Nyvim-q9?|Db;_^M_^X^Yj{(:o+&^F^O7^S02`^M^S^M^S^WC_        m|e.^_^WWADTZ^XG^K_M/u-^^THX^Pj^]G^X    ^Ao^?67^M8=4578h5:n0fb0QS)|va7X^^^ARa:gb619-^?2}1$wrL^^T]oIHtU^V^VL^Vp^KX^UQD8a^80Y^CV^A^F^@T[wp}iid@
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^N      %."ft'gl?1)=b
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M*kj|IW_
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b65777737d0d9cd9a7d2^M^BYU^G^A^L^GQ^CRZD^V^X[^ZIWX]^O.f4        Y_[]WS^Q^Q%g%!am31y>1\^K^M^@^NQ^R^B^RF^P^F^PDU^OT^D)c!OERKCW_
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^O^T^QN^FLG]    ^Y^U^YM^@}N^]nli/j^BM{6:>dyjbP6;bka1e87P:9hik3, ,6$uclj`~:c     ^@^F^P^TCSK^P^X]V^N^X@o^P^Ud?g7.m>^OPSR^AWRQZ^EY^C[TU^F\VW^K^A^TDTE^G^Q^U^]
^LB]ESC3V<5777737d0d9cd9a7d2^M^BYU^G^A^L^GQ^CRZD^V^X[^ZIWX]^O^XSRa
^N\\R^@^YE"3ur3l?3^?:b  ^N^O^A^B^B^@
WUPC^PG^CK^UTZNGX^MGygjjh)khVo>e8a8e61nkbfg<35e92476a37e6ae71  testfile.84
ca71053225`f2i3d=dld2je?072<oe`k% teDC^CY
^DH\Q<^AS^L^O^F^A^BU^G^@^B^B]^@^G       RQ\S?1{wq4|t^BRSRVP^A^F^LW^A\Q^C^@^MQP^]^K
W^GF^P^VP^RMU^OLEZ\D~file.88
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@_[URR^E^@^@^@^@^@bd3de847ae14792f7ecb9ac5b325g5:c"pwbrw`dk6uenV1m2?2bi419808ac379076ed93526f196  testfile.93
0613ef190d722a8721210cee9a705d2f  testfile.98
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ab9e178716fece7b5a59e60944f8984d  testfile.97
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ac8e6f3d8b39c2d7213a3b652b33fac5  testfile.100
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
(END) 


[root@transformers ~]# gluster --version
glusterfs 3.7.1 built on Jun 28 2015 11:01:17
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General Public License.
[root@transformers ~]# 


Attaching the fuse mount log.

Comment 7 Bhaskarakiran 2015-06-29 12:04:09 UTC

Created attachment 1044334 [details]
fuse mount log

Comment 10 Bhaskarakiran 2015-07-08 10:27:42 UTC

The data corruption is still seen on 3.7.1-8 buid. With below 3 scenarios.

1. Bring down the bricks and do the appends
2. Bring them back up, delete the file and do the appends
3. While the appends are happening, bring down the bricks.

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]BMB@R                                                      ZUDyKQEBV
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Moving back to assigned state.

Comment 15 Bhaskarakiran 2015-07-20 07:21:50 UTC

verified this on 3.7.1-11 build and didn't see the data corruption. Tested bringing down/up the bricks and heal enabled / disabled.  Marking this as fixed.

Comment 16 errata-xmlrpc 2015-07-29 05:01:32 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-1495.html

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