Bug 1582058

Summary:	Input/Output errors on a disperse volume with concurrent reads and writes
Product:	[Community] GlusterFS	Reporter:	Xavi Hernandez <jahernan>
Component:	disperse	Assignee:	Xavi Hernandez <jahernan>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	3.12	CC:	bugs
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Clone Of:	1578325	Environment:
Last Closed:	2018-05-24 06:15:20 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:	1578325
Bug Blocks:

Description Xavi Hernandez 2018-05-24 05:54:23 UTC

+++ This bug was initially created as a clone of Bug #1578325 +++

Description of problem:

When parallel-writes is enabled and multiple reads and writes (non-overlapping) are sent concurrently, sometimes writes fail with an Input/Output error of file not found error.

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


How reproducible:

Randomly on a Ganesha mount. I've been unable to reproduce it on FUSE.

Steps to Reproduce:
1. Create a disperse volume
2. Create a Ganesha cluster using gfapi
3. Mount three clients to three different NFS servers
4. From one client run Bonnie++
5. From second client run ls -la in a loop
6. From third client run du -sh in a loop

Actual results:

Bonnie++ fails in the rewriting test.

Expected results:

Bonnie++ shouldn't fail

Additional info:

As a workaround, disabling parallel-writes hides the problem.

Comment 1 Xavi Hernandez 2018-05-24 06:15:20 UTC

Version 3.12 doesn't support parallel writes, so this bug is not present there. I cloned the bug before checking... sorry.