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Bug 1447916

Summary:	cleanup of a bundle resource may result in the crmd process on the DC node taking 100 % of a CPU
Product:	Red Hat Enterprise Linux 8	Reporter:	Tomas Jelinek <tojeline>
Component:	pacemaker	Assignee:	Ken Gaillot <kgaillot>
Status:	CLOSED WONTFIX	QA Contact:	cluster-qe <cluster-qe>
Severity:	high	Docs Contact:
Priority:	low
Version:	8.3	CC:	cluster-maint
Target Milestone:	rc	Flags:	pm-rhel: mirror+
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-12-01 07:28:38 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:

Description Tomas Jelinek 2017-05-04 08:47:01 UTC

Description of problem:
Running "crm_resource --resource <bundle resource> --cleanup" may
result in the crmd process on the DC node taking 100 % of a CPU.


Version-Release number of selected component (if applicable):
pacemaker-1.1.16-8.el7.x86_64


How reproducible:
easily, most of the time


Steps to Reproduce:
1. create a bundle
2. run "crm_resource --resource <bundle resource> --cleanup"
3. it may be neede to run the command several 


Actual results:
# crm_resource --resource http-bundle --cleanup
Cleaning up http-bundle-docker-0 on rh73-node1, removing fail-count-http-bundle-docker-0
Cleaning up http-bundle-docker-0 on rh73-node2, removing fail-count-http-bundle-docker-0
Cleaning up http-bundle-ip-192.168.122.250 on rh73-node1, removing fail-count-http-bundle-ip-192.168.122.250
Cleaning up http-bundle-ip-192.168.122.250 on rh73-node2, removing fail-count-http-bundle-ip-192.168.122.250
Cleaning up http-bundle-0 on rh73-node1, removing fail-count-http-bundle-0
Cleaning up http-bundle-0 on rh73-node2, removing fail-count-http-bundle-0
Cleaning up http-bundle-docker-1 on rh73-node1, removing fail-count-http-bundle-docker-1
Cleaning up http-bundle-docker-1 on rh73-node2, removing fail-count-http-bundle-docker-1
Cleaning up http-bundle-ip-192.168.122.251 on rh73-node1, removing fail-count-http-bundle-ip-192.168.122.251
Cleaning up http-bundle-ip-192.168.122.251 on rh73-node2, removing fail-count-http-bundle-ip-192.168.122.251
Cleaning up http-bundle-1 on rh73-node1, removing fail-count-http-bundle-1
Cleaning up http-bundle-1 on rh73-node2, removing fail-count-http-bundle-1
Cleaning up dummy1:0 on rh73-node1, removing fail-count-dummy1
Cleaning up dummy1:0 on rh73-node2, removing fail-count-dummy1
Waiting for 14 replies from the CRMd.............. OK

Then crmd takes 100 % of a CPU. Sometimes the "OK" at the last line is missing.


Expected results:
crmd does not take 100 % of a CPU.


Additional info:
Bundle configuration:
      <bundle id="http-bundle">                                                 
        <docker image="pcmktest:http" options="--log-driver=journald" replicas="2"/>
        <network host-netmask="24" host-interface="ens3" ip-range-start="192.168.122.250">
          <port-mapping port="80" id="http-bundle-port-map-80"/>                
        </network>                                                              
        <storage>                                                               
          <storage-mapping source-dir-root="/root/docker/www" target-dir="/var/www/html" options="rw" id="http-bundle-storage-map"/>
          <storage-mapping source-dir-root="/root/docker/logs" target-dir="/etc/httpd/logs" options="rw" id="http-bundle-storage-map-1"/>
        </storage>                                                              
        <primitive class="ocf" id="dummy1" provider="pacemaker" type="Stateful">
          <operations>                                                          
            <op id="dummy1-monitor-interval-10" interval="10" name="monitor" role="Master" timeout="20"/>
            <op id="dummy1-monitor-interval-11" interval="11" name="monitor" role="Slave" timeout="20"/>
            <op id="dummy1-start-interval-0s" interval="0s" name="start" timeout="20"/>
            <op id="dummy1-stop-interval-0s" interval="0s" name="stop" timeout="20"/>
          </operations>                                                         
        </primitive>                                                            
      </bundle>

Comment 2 Andrew Beekhof 2017-05-05 01:37:31 UTC

I was talking to klaus about this yesterday, its something to do with the remote connection resource.

If you 'killall -TRAP crmd' a few times you see thousands of copies of:

trace   May 04 03:58:04 mainloop_gio_callback(673):0: New message from
remote-lrmd-pcmk-2:1111[0x7f9def161c60] 1
trace   May 04 03:58:04 lrmd_tls_dispatch(366):0: tls dispatch
triggered after disconnect

And if you think I'm exaggerating:

[root@pcmk-2 /]# qb-blackbox /var/lib/pacemaker/blackbox/crmd-349.2 |
grep "trace   May 04 03:58:04 mainloop_gio_callback" | wc -l
4317


The message in particular suggests we're not correctly cleaning up dead connections.

Comment 3 Andrew Beekhof 2017-05-05 01:38:30 UTC

Oh and the other symptom is that all IPC to the crmd (eg. subsequent cleanup calls) fails.

Comment 4 Ken Gaillot 2017-11-01 22:38:08 UTC

This is unlikely to be solved in the 7.5 timeframe

Comment 6 Ken Gaillot 2017-11-01 22:57:27 UTC

Whoops, picked wrong drop-down

Comment 7 Ken Gaillot 2020-05-06 00:42:53 UTC

Will consider for RHEL 8

Comment 10 RHEL Program Management 2020-12-01 07:28:38 UTC

After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.