Currently, it's not clear that the issues is on the templates or it's connected
to the fact that the sat instance is also running other tests.

Could you provide the output of this commands run on the sat server when the timeouts occur:

passenger-status --show=pool
passenger-status --show=requests

after discussing and looking into the issue together with Ivan, we found out the following:

for provisioning templates:

- submitting the new Provisioning template dialog issues a POST request to /provisioning_templates as expected, however it also issues 2 mysterious GET requests to:
https://<fqdn>/hosts/preview_host_collection?scope=ProvisioningTemplate

- these seem to also finish successfully (200), however, the jQuery.active count gets decremented just by 1 (instead of 2).
- from this point, Every other request to /provisioning_templates/new page issues +1 request to /preview_host_collection (in 2nd occurrence there are now 3 such requests).

The change that seemed to introduce this issue is here https://github.com/theforeman/foreman/pull/4213. Since it's not a performance issue, but rather a UI thing, I'm changing the component to provisioning templates.

Created redmine issue http://projects.theforeman.org/issues/21112 from this bug

Upstream bug assigned to inecas

Upstream bug assigned to inecas

Moving this bug to POST for triage into Satellite 6 since the upstream issue http://projects.theforeman.org/issues/21112 has been resolved.

VERIFIED
since sat6.3.0-25

the affected test in the automation are now unblocked and pass.

tests.foreman.ui.test_partitiontable::PartitionTableTestCase
tests.foreman.ui.test_template::TemplateTestCase

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/RHSA-2018:0336