Bug 1046576

Summary:	NFS: Provide proper diagnostic messages for Duplicate Reply Cache
Product:	[Red Hat Storage] Red Hat Gluster Storage	Reporter:	ssamanta
Component:	gluster-nfs	Assignee:	Niels de Vos <ndevos>
Status:	CLOSED DEFERRED	QA Contact:	Matt Zywusko <mzywusko>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	2.1	CC:	mzywusko, vagarwal, vbellur
Target Milestone:	---	Keywords:	AutomationBlocker
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-11-27 09:32:04 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:	1045271
Bug Blocks:

Description ssamanta 2013-12-26 07:40:28 UTC

Description of problem:
NFS Duplicate Reply cache feature should provide proper debugging messages with the reason of the failure in nfs log file when the NFS server could not cache the duplicate request message or could not send the cached reply for some reason.

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

[root@localhost ~]# rpm -qa | grep glusterfs
glusterfs-api-3.4.0.52rhs-1.el6rhs.x86_64
glusterfs-libs-3.4.0.52rhs-1.el6rhs.x86_64
glusterfs-geo-replication-3.4.0.52rhs-1.el6rhs.x86_64
samba-glusterfs-3.6.9-167.8.el6rhs.x86_64
glusterfs-3.4.0.52rhs-1.el6rhs.x86_64
glusterfs-server-3.4.0.52rhs-1.el6rhs.x86_64
glusterfs-rdma-3.4.0.52rhs-1.el6rhs.x86_64
glusterfs-fuse-3.4.0.52rhs-1.el6rhs.x86_64
[root@localhost ~]# 


How reproducible:


Steps to Reproduce:
1. create a 6x2 volume, start it
2. mount over nfs, create 10 directories
3. set limit of 1TB on root of the volume and 10GB on each directory
4. start creating data inside each directory.

Actual results:
The following error messages appears in the nfs.log
[2013-12-19 21:40:01.826319] E [rpc-drc.c:499:rpcsvc_add_op_to_cache] 0-rpc-service: DRC failed to detect duplicates

Expected results:
The error message "DRC failed to detect duplicates" doesnot give any information about failure reason which is blocking our automation to proceed.


Additional info:
This is a test/automation blocker. Refer- Bug 1045271

Comment 6 Niels de Vos 2015-11-27 09:32:04 UTC

Newer versions of RH(G)S have DRC disabled by default due to instability issues. We are currently not planning to resolve these issues in Gluster/NFS. When progress is made in upstream bug 1105883, we can revisit this decision.