Bug 1295299

Summary:	glusterfs fuse mount session hangs indefinitely when a file create progressively fills up the hot tier completely
Product:	[Red Hat Storage] Red Hat Gluster Storage	Reporter:	Nag Pavan Chilakam <nchilaka>
Component:	tier	Assignee:	Bug Updates Notification Mailing List <rhs-bugs>
Status:	CLOSED ERRATA	QA Contact:	krishnaram Karthick <kramdoss>
Severity:	high	Docs Contact:
Priority:	high
Version:	rhgs-3.1	CC:	byarlaga, josferna, nbalacha, rcyriac, rgowdapp, rhs-bugs, sankarshan, smohan, storage-qa-internal
Target Milestone:	---	Keywords:	Regression, ZStream
Target Release:	RHGS 3.1.2
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	glusterfs-3.7.5-16	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-03-01 06:06:36 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:	1219794
Bug Blocks:	1258386

Description Nag Pavan Chilakam 2016-01-04 07:10:15 UTC

Description of problem:
===========================
Suppose a hot disk(assume 1GB disk) is about 85%(~850MB) filled(not hit minfree), and I use dd command to create a file which will now exceed the total disk capacity 100%(300MB file), the file create starts off but , after sometime the fuse mount session hangs indefinetly.

This is a regression found during validation of bz#1291566


Version-Release number of selected component (if applicable):
===============================
3.7.5-13



Note:Refer BZ#1291566 for more info or steps

Comment 3 Nithya Balachandran 2016-01-08 10:48:23 UTC

Is this the same issue seen in write-behind ?

Comment 5 Joseph Elwin Fernandes 2016-01-08 17:22:00 UTC

Even there is a crash : https://bugzilla.redhat.com/show_bug.cgi?id=1297004

Comment 6 Raghavendra G 2016-01-11 06:04:01 UTC

Yes. Hang similar to bz 1219794. Most likely a duplicate. But if you want to confirm, can you take statedump of inodes of the client process after hang? I can confirm with inode statedump.

Comment 7 krishnaram Karthick 2016-01-29 10:19:17 UTC

Issue is no more seen in build glusterfs-3.7.5-17.el7rhgs.x86_64.

Steps followed to verify the bug:
1) Create a tiered volume and fill hot disk
2) As new file get created, old files kept demoting
3) No hangs were seen from the client

Moving the bug to verified.

Comment 9 errata-xmlrpc 2016-03-01 06:06:36 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/RHBA-2016-0193.html