Bug 584574

Summary:	groupd blocks on startup when spemaphore limit exceeded.
Product:	Red Hat Enterprise Linux 5	Reporter:	Guil Barros <gbarros>
Component:	openais	Assignee:	Jan Friesse <jfriesse>
Status:	CLOSED DUPLICATE	QA Contact:	Cluster QE <mspqa-list>
Severity:	high	Docs Contact:
Priority:	high
Version:	5.4	CC:	cluster-maint, edamato, sdake, tao
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-05-31 13:23:21 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 Guil Barros 2010-04-21 21:09:09 UTC

Description of problem:
One cluster startup if there are is no more semaphore space available groupd will block and not throw an error message.

strace of groupd shows:
semget(0x11b8c82e, 3, IPC_CREAT|IPC_EXCL|0600) = -1 ENOSPC (No space left on device)
geteuid()                               = 0

ipcs -a hows semaphore count is equal to kernel.sem.

Version-Release number of selected component (if applicable):
openais-0.80.3-22.el5_3.8-x86_64

How reproducible:
- every time

Steps to Reproduce:
- Use up all semaphores
- Attempt to start cluster suite
  
Actual results:
cman startup hangs

Expected results:
Cluster startup should error out with a useful message

Comment 1 Steven Dake 2010-05-04 20:38:03 UTC

Honza,

Have a look at resolving this problem.

Also changing to 5.4 from 5.4.z since this is not a z stream regression.

Comment 2 Jan Friesse 2010-05-31 13:23:21 UTC

This bug is duplicate of https://bugzilla.redhat.com/show_bug.cgi?id=561546 so closing this bug as duplicate. You can find solution based on POSIX semaphores in mentioned bug.

*** This bug has been marked as a duplicate of bug 561546 ***