Bug 1511767

Summary:	After detach tier start glusterd log flooded with "0-transport: EPOLLERR - disconnecting now" messages
Product:	[Red Hat Storage] Red Hat Gluster Storage	Reporter:	Bala Konda Reddy M <bmekala>
Component:	tier	Assignee:	hari gowtham <hgowtham>
Status:	CLOSED ERRATA	QA Contact:	Sweta Anandpara <sanandpa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rhgs-3.3	CC:	amukherj, rhinduja, rhs-bugs, storage-qa-internal
Target Milestone:	---
Target Release:	RHGS 3.4.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	glusterfs-3.12.2-1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-09-04 06:39:09 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:
Bug Blocks:	1503137

Description Bala Konda Reddy M 2017-11-10 05:14:21 UTC

Description of problem:
After performing detach tier start, glusterd log is flooded with   "[socket.c:2465:socket_event_handler] 0-transport: EPOLLERR - disconnecting now" for every 3 seconds.

Version-Release number of selected component (if applicable):
3.8.4-51

How reproducible:
always

Steps to Reproduce:
1. Create and start disperse volume 
2. Mount the volume and write some data
3. attach X2 replica as hot tier to volume
4. Perform detach tier start

Actual results:
Functionality wise it is working fine but glusterd log is flooded with Info messages for every 3 seconds 

Expected results:
continuous "EPOLLERR - disconnecting now" should not be seen in glusterd log. 

Additional info:

Comment 2 hari gowtham 2017-11-10 10:41:42 UTC

Partial RCA:
The defrag variable being shared between tier process and detach process, doesn't cause the issue as per the first suspect. I can see it be fine in an older version of downstream (3.8.0) where the tier process and detach process share the defrag variable

with the downstream code (3.8.4-51) I can see a disconnect but I don't see a connect. may be that's why its still keeps trying to connect. 

I need to look further to understand why there is this change. and why we dont get a RPC connect with the current code (3.8.4-51).

Comment 3 hari gowtham 2017-11-13 12:55:18 UTC

Hi,

The ablove issue is not reproducible with the downstream version 3.4.0.
Things work fine. Is it necessary to take a look at this with the issue being fixed in 3.4.0?

Regards,
Hari.

Comment 9 errata-xmlrpc 2018-09-04 06:39:09 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://access.redhat.com/errata/RHSA-2018:2607