Bug 1282771 - IO hangs after detach tier commit of nfs mount
Summary: IO hangs after detach tier commit of nfs mount
Alias: None
Product: Red Hat Gluster Storage
Classification: Red Hat
Component: tier
Version: rhgs-3.1
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: ---
Assignee: hari gowtham
QA Contact: Nag Pavan Chilakam
Whiteboard: tier-fuse-nfs-samba
Depends On: 1306930
Blocks: 1358581
TreeView+ depends on / blocked
Reported: 2015-11-17 11:21 UTC by Bhaskarakiran
Modified: 2018-02-06 17:52 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 1358581 (view as bug list)
Last Closed: 2018-02-06 17:52:18 UTC
Target Upstream Version:

Attachments (Terms of Use)

Description Bhaskarakiran 2015-11-17 11:21:44 UTC
Description of problem:

Created a 8+4 disperse volume and attached a 2x2 hot tier. While IO is running, detached hot tier and committed, IO hangs on the client. This is on NFS mount.

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

[root@vertigo glusterfs]# gluster --version
glusterfs 3.7.5 built on Nov 10 2015 00:13:38
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
You may redistribute copies of GlusterFS under the terms of the GNU General Public License.
[root@vertigo glusterfs]# 

How reproducible:

Steps to Reproduce:
1. create a 8+4 ec volume and attach a 2x2 dist-rep hot tier
2. NFS mount on the client. untar kernel tarball and while it is in progress detach tier and commit.
3. Check the IO from client

Actual results:
IO hangs

Expected results:
IO should continue to run.

Additional info:
sosreports will be copied to rhsqe.

Comment 2 Soumya Koduri 2015-11-24 09:10:15 UTC
It seems to be rpc throttle issue. I see so many outstanding requests during attach/detach-tier operations. Once the throttle limit is set to zero, I do not see any hangs. 

Request QE to try re-runnig the tests after disabling throttling and confirm if the issue still persist. Thanks!

Comment 12 Shyamsundar 2018-02-06 17:52:18 UTC
Thank you for your bug report.

We are not further root causing this bug, as a result this bug is being closed as WONTFIX. Please reopen if the problem continues to be observed after upgrading
to a latest version.

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