As mentioned in the review, this is not related to that patch as it's failing to list the stacks in undercloud heat.
However from the heat api logs it's quite confusing.
It fails around 2018-10-08 01:12:42 and the corresponding heat api log
http://logs.openstack.org/24/567224/117/check/tripleo-ci-centos-7-undercloud-upgrades/e4ad94e/logs/undercloud/var/log/heat/heat_api.log.txt.gz#_2018-10-08_01_12_42_343
However, then it seems heat-api is restarted and it seems to work fine in a later time.
http://logs.openstack.org/24/567224/117/check/tripleo-ci-centos-7-undercloud-upgrades/e4ad94e/logs/undercloud/var/log/heat/heat_api.log.txt.gz#_2018-10-08_01_15_04_869
As mentioned in the review, this is not related to that patch as it's failing to list the stacks in undercloud heat.
However from the heat api logs it's quite confusing.
It fails around 2018-10-08 01:12:42 and the corresponding heat api log
http:// logs.openstack. org/24/ 567224/ 117/check/ tripleo- ci-centos- 7-undercloud- upgrades/ e4ad94e/ logs/undercloud /var/log/ heat/heat_ api.log. txt.gz# _2018-10- 08_01_12_ 42_343
However, then it seems heat-api is restarted and it seems to work fine in a later time.
http:// logs.openstack. org/24/ 567224/ 117/check/ tripleo- ci-centos- 7-undercloud- upgrades/ e4ad94e/ logs/undercloud /var/log/ heat/heat_ api.log. txt.gz# _2018-10- 08_01_15_ 04_869