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Bug 1836305

Summary:	[telco] ovsdb-server for NBDB pegged at 100% when running these commands
Product:	Red Hat Enterprise Linux Fast Datapath	Reporter:	Dumitru Ceara <dceara>
Component:	openvswitch2.13	Assignee:	Dumitru Ceara <dceara>
Status:	CLOSED ERRATA	QA Contact:	Zhiqiang Fang <zfang>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	RHEL 8.0	CC:	ctrautma, dcbw, dceara, jhsiao, jishi, kfida, qding, ralongi
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	All
Whiteboard:	Telco
Fixed In Version:	openvswitch2.13-2.13.0-28.el8fdp	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1828639	Environment:
Last Closed:	2020-07-15 12:58:16 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:
Bug Depends On:	1828639
Bug Blocks:	1828637, 1837257

Comment 1 OvS team 2020-05-15 21:03:35 UTC

* Fri May 15 2020 Dumitru Ceara <dceara> - 2.13.0-28
- raft: Disable RAFT jsonrpc inactivity probe. (#1836308)
  [3d9b529afb098531190d57d6f35d1622bb4093cd]
* Fri May 15 2020 Dumitru Ceara <dceara> - 2.13.0-27
- raft: Fix leak of the incomplete command. (#1836307)
  [5c38ccd52fb3925e82eda20f1897ec02abb390d9]
* Fri May 15 2020 Dumitru Ceara <dceara> - 2.13.0-26
- raft: Fix the problem of stuck in candidate role forever. (#1836305)
  [9c76350e271546eedfeb18720975e35b4e36e1f1]
* Fri May 15 2020 Dumitru Ceara <dceara> - 2.13.0-25
- raft: Fix next_index in install_snapshot reply handling. (#1836305)
  [cc3d02699203e2fe9d9fd384d09e268ba614828d]
* Fri May 15 2020 Dumitru Ceara <dceara> - 2.13.0-24
- raft: Avoid busy loop during leader election. (#1836305)
  [053b78c8d60ffb4d212fd7894f91be52027f291f]

* Fri May 15 2020 Dumitru Ceara <dceara> - 2.13.0-23
- raft: Fix raft_is_connected() when there is no leader yet. (#1836305)
  [e732012d7be335650398ff03c2431c64b2c4aaba]

* Fri May 15 2020 Dumitru Ceara <dceara> - 2.13.0-22
- ovsdb-server: Don't disconnect clients after raft install_snapshot. (#1836305)
  [8ff30dfee6cb075e36ed38b77695ff03321ce12b]

* Fri May 15 2020 Dumitru Ceara <dceara> - 2.13.0-21
- raft-rpc: Fix message format. (#1836305)
  [914d885061c9f7e7e6e5f921065301e08837e122]

Comment 4 Jianlin Shi 2020-06-15 08:39:28 UTC

thanks Dumitru for reproducer in https://bugzilla.redhat.com/show_bug.cgi?id=1828639#c8.
reproduced on openvswitch2.13.0-18:
[root@dell-per740-12 ~]# rpm -qa | grep -E "openvswitch|ovn"
ovn2.11-2.11.1-47.el8fdp.x86_64
openvswitch-selinux-extra-policy-1.0-23.el8fdp.noarch
ovn2.11-central-2.11.1-47.el8fdp.x86_64
ovn2.11-host-2.11.1-47.el8fdp.x86_64
openvswitch2.13-2.13.0-18.el8fdp.x86_64

[root@dell-per740-12 ~]# grep "wakeup due to" /var/log/openvswitch/ovsdb-server-nb.log                
2020-06-15T08:35:38.923Z|00084|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:38.923Z|00085|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:38.923Z|00086|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:38.923Z|00087|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:38.923Z|00088|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:38.923Z|00089|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:38.923Z|00090|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:38.923Z|00091|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:38.923Z|00092|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:38.923Z|00093|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:44.923Z|00101|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:50.923Z|00103|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)                                                                                         
2020-06-15T08:35:56.923Z|00111|poll_loop|INFO|wakeup due to 0-ms timeout at ../ovsdb/trigger.c:164 (99% CPU usage)

Verified on openvswitch2.13.0-38:

[root@dell-per740-12 ~]# rpm -qa | grep -E "openvswitch|ovn"                                          
ovn2.11-2.11.1-47.el8fdp.x86_64                                                                       
openvswitch-selinux-extra-policy-1.0-23.el8fdp.noarch                                                 
ovn2.11-central-2.11.1-47.el8fdp.x86_64                                                               
openvswitch2.13-2.13.0-38.el8fdp.x86_64                                                               
ovn2.11-host-2.11.1-47.el8fdp.x86_64

[root@dell-per740-12 ~]# grep "wakeup due to" /var/log/openvswitch/ovsdb-server-nb.log

<==== no wakeup error

Comment 6 errata-xmlrpc 2020-07-15 12:58:16 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-2020:2948