Bug 1792723

Summary: Domain set time does not release the lock
Product: Red Hat Enterprise Linux Advanced Virtualization Reporter: Dan Zheng <dzheng>
Component: libvirtAssignee: Ján Tomko <jtomko>
Status: CLOSED ERRATA QA Contact: Lili Zhu <lizhu>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 8.2CC: chhu, dyuan, jdenemar, jsuchane, jtomko, lmen, xuzhang
Target Milestone: rcKeywords: Automation, Regression
Target Release: 8.2Flags: pm-rhel: mirror+
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: libvirt-6.0.0-2.el8 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-05-05 09:55:54 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:
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Description Flags
libvirtd log none

Description Dan Zheng 2020-01-19 12:31:18 UTC 
Description of problem:
Domain set time does not releases the lock which causes getting domain time failed.

Version-Release number of selected component (if applicable):
libvirt-6.0.0-1.module+el8.2.0+5453+31b2b136.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Start guest and get domain time and set domain time

# virsh domtime test
Time: 1579436433
# virsh domtime test --time 1000000000

2. Get domain time again, but get hung for 30 seconds and finally timeout.
# date;virsh domtime test;date
Sun Jan 19 07:23:01 EST 2020
error: Timed out during operation: cannot acquire state change lock (held by agent=remoteDispatchDomainSetTime)

Sun Jan 19 07:23:31 EST 2020




Actual results:

See above.
Expected results:

virsh command returns OK.

Additional info:
Comment 2 Dan Zheng 2020-01-19 12:36:39 UTC 
Created attachment 1653621 [details]
libvirtd log
Comment 3 Ján Tomko 2020-01-20 07:02:21 UTC 
Upstream patch:
https://www.redhat.com/archives/libvir-list/2020-January/msg00827.html
Comment 4 Ján Tomko 2020-01-20 08:29:22 UTC 
Pushed as:
commit d61f95cf6a6fbd564e104c168d325581acd9cd8d
Author:     Ján Tomko <jtomko>
CommitDate: 2020-01-20 07:55:48 +0100

    qemu: end the agent job in qemuDomainSetTimeAgent
    
    This function grabs an agent job but ends a monitor job.
    End the agent job instead.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1792723
    
    Signed-off-by: Ján Tomko <jtomko>
    Reported-by: Dan Zheng <dzheng>
    Fixes: e005c95f56fee9ed780be7f8db103d690bd34cbd

git describe: v6.0.0-67-gd61f95cf6a
Comment 7 Lili Zhu 2020-02-12 10:16:35 UTC 
Verify this bug with:
libvirt-6.0.0-4.module+el8.2.0+5642+838f3513.x86_64
qemu-kvm-4.2.0-8.module+el8.2.0+5607+dc756904.x86_64
qemu-guest-agent-4.2.0-8.module+el8.2.0+5607+dc756904.x86_64

1. Start guest and get domain time and set domain time
# virsh domtime rhel8.2
Time: 1581495530
[root@lenovo-sr630-06 ~]# virsh domtime rhel8.2 --time 1581495513

2. Get domain time again
[root@lenovo-sr630-06 ~]# date;virsh domtime rhel8.2; date
Wed Feb 12 05:11:38 EST 2020
Time: 1581495526
Wed Feb 12 05:11:38 EST 2020

As querying guest time did not hang, match with expected result, mark the bug as verified.
Comment 9 errata-xmlrpc 2020-05-05 09:55:54 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:2017