Bug 731584

Summary:	exiting the console during output causes subsequent commands to fail
Product:	Red Hat Enterprise Linux 6	Reporter:	Dave Allan <dallan>
Component:	libvirt	Assignee:	Daniel Berrangé <berrange>
Status:	CLOSED WORKSFORME	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	high	Docs Contact:
Priority:	high
Version:	6.2	CC:	dyuan, mzhan, rwu, vbian, veillard, ydu
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	libvirt-0.9.4-8.el6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-09-08 02:50:17 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Dave Allan 2011-08-17 21:39:01 UTC

If I get on the console and execute:

while true ; do echo -n "The quick brown fox jumped over the lazy
dogs.  The quick brown fox jumped over the lazy dogs.  "; done

and exit the console while the output is spraying, I see a
failure:

 the lazy dogs.  The quick brown fox jumped over the lazy dogs.  The
 quick brown fox jumped over t
virsh # console foo
error: failed to get domain 'foo'
error: An error occurred, but the cause is unknown

virsh # console foo
error: failed to get domain 'foo'
error: An error occurred, but the cause is unknown

virsh # console foo
error: failed to get domain 'foo'
error: no call waiting for reply with prog 536903814 vers 1 serial 6

virsh #

0.9.4-4

Comment 3 Dave Allan 2011-08-22 12:36:30 UTC

The domain I was testing was on my local workstation.

Comment 7 Vivian Bian 2011-09-07 10:01:36 UTC

Hi Dave, 
tested with following pkgs , and didn't encounter this bug 
But since we can't reproduce this bug even with the old version .Would you
please help confirm the patch ? 

libvirt-0.9.4-9.el6
qemu-kvm-0.12.1.2-2.185.el6
kernel-2.6.32-193.el6

1. configure guest grub with "console=tty0 console=ttyS0,115200n8" appended in
the kernel command line 
2. configure guest with serial device added 
    <serial type='pty'>
      <source path='/dev/pts/5'/>
      <target port='0'/>
      <alias name='serial0'/>
    </serial>
3. start guest 
4. enter interactive mode of virsh 
   # virsh  
   Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # console test1
Connected to domain test1
Escape character is ^]

perform the while loop in the guest , and then make a connect-disconnect operation . Never met subsequent commands failures .

Comment 8 Dave Allan 2011-09-07 15:13:31 UTC

I was testing using a libvirt that I built myself, so perhaps that's the source of the difference.  This behavior was nearly 100% reproducible for me, so if you've tested it with the latest libvirt and it's not present, I think you can close as WORKSFORME.

Comment 9 Vivian Bian 2011-09-08 02:50:17 UTC

According to comment 8 , close this bug as worksforme . Once this bug is encountered , we'll open it again