Bug 442019

Summary:	yum blocks when having blocking file systems
Product:	Red Hat Enterprise Linux 5	Reporter:	Klaus Ethgen <Klaus+rhbz>
Component:	rpm	Assignee:	Panu Matilainen <pmatilai>
Status:	CLOSED NEXTRELEASE	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	5.1	CC:	james.antill, mvadkert
Target Milestone:	rc	Keywords:	Reopened
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-11-15 10:43:58 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Klaus Ethgen 2008-04-11 10:35:23 UTC

Description of problem:
We have systems where a file system (NFS) is unaccessible sometimes. Also there 
are file systems wher root has no access and will not have ever.

In the later case we get just a "Permission denied" which is not nice but ok. 
In the first case yum will block forever.

How reproducible:
- Mount a NFS filesystem from a remote server
- Switch off the remote server (or make it unavailable per iptables or other)
- Try to install/remove packages with yum
  
Actual results:
It blocks

Expected results:
No block

Comment 1 James Antill 2009-03-25 05:39:26 UTC

What could it do? What other programs don't fail in this way?

Comment 2 Klaus Ethgen 2009-03-25 07:20:39 UTC

Ehem, That it clearly a bug.

There is no reason why yum should block when the filesystem is not releated to the path where to install.

Ok, I did forget to mention that I mean to have the NFS filesystem in (for example) /home/.../... or /net/... or somethink absolutelly unrelated to any path yum is needed to access.

To your question: I d not know any other program which fails this way.

So this IS a bug. And a grave one too.

Comment 3 James Antill 2009-03-25 13:12:09 UTC

 So you have a path like:

/my/inaccessible/path

...and yum has problems with it? This only when installing/removing packages, yes?
 Does rpm work? As I seem to recall that rpm stats. mount points when it runs the transaction. So moving there, but it's NaB IMO or maybe a feature request.

Comment 5 Panu Matilainen 2010-11-15 10:43:58 UTC

Rpm in RHEL 6 only accesses and stat()'s paths actually relevant to the transaction, so it doesn't hang on unrelated things like NFS mounts. It's not backportable to RHEL 5 however due to the API changes involved.