Deployment fails with ERROR! Unexpected Exception, this is probably a bug: 'Block' object has no attribute '_host'

[Rabi Mishra]

Looks like possibly a ansible bug with async task with default linear strategy.

Noticed at:

https://59000697c1dd9a7c3300-e8a1ce79b4913d33657fcbac5f6aef09.ssl.cf1.rackcdn.com/733036/2/check/tripleo-ci-centos-8-scenario001-standalone/38045f8/logs/undercloud/home/zuul/ansible.log

traceback:

2020-06-04 19:37:09,250 p=19343 u=root n=ansible | 2020-06-04 19:37:09.250312 | fa163e53-be6b-a7bc-b7b7-000000001c3e | TASK | Run containers execs asynchronously
2020-06-04 19:37:09,377 p=19343 u=root n=ansible | 2020-06-04 19:37:09.377064 | f03cfe50-f005-4d18-8090-1324f72affda | INCLUDED | /usr/share/ansible/roles/tripleo_container_manage/tasks/podman/exec.yml | standalone
2020-06-04 19:37:09,426 p=19343 u=root n=ansible | 2020-06-04 19:37:09.426162 | fa163e53-be6b-a7bc-b7b7-000000001e9a | TASK | Check if containers are running before doing exec
2020-06-04 19:37:09,548 p=19343 u=root n=ansible | 2020-06-04 19:37:09.547657 | fa163e53-be6b-a7bc-b7b7-000000001e9c | TASK | Async container exec
2020-06-04 19:37:09,669 p=19343 u=root n=ansible | 2020-06-04 19:37:09.668395 | fa163e53-be6b-a7bc-b7b7-000000001e9e | TASK | Check podman exec status
2020-06-04 19:37:09,741 p=19343 u=root n=ansible | ERROR! Unexpected Exception, this is probably a bug: 'Block' object has no attribute '_host'
2020-06-04 19:37:09,741 p=19343 u=root n=ansible | to see the full traceback, use -vvv
2020-06-04 19:37:09,746 p=19343 u=root n=ansible | the full traceback was:

Traceback (most recent call last):
  File "/bin/ansible-playbook", line 123, in <module>
    exit_code = cli.run()
  File "/usr/lib/python3.6/site-packages/ansible/cli/playbook.py", line 127, in run
    results = pbex.run()
  File "/usr/lib/python3.6/site-packages/ansible/executor/playbook_executor.py", line 169, in run
    result = self._tqm.run(play=play)
  File "/usr/lib/python3.6/site-packages/ansible/executor/task_queue_manager.py", line 241, in run
    play_return = strategy.run(iterator, play_context)
  File "/usr/lib/python3.6/site-packages/ansible/plugins/strategy/linear.py", line 325, in run
    results += self._wait_on_pending_results(iterator)
  File "/usr/lib/python3.6/site-packages/ansible/plugins/strategy/__init__.py", line 764, in _wait_on_pending_results
    results = self._process_pending_results(iterator)
  File "/usr/lib/python3.6/site-packages/ansible/plugins/strategy/__init__.py", line 110, in inner
    results = func(self, iterator, one_pass=one_pass, max_passes=max_passes)
  File "/usr/lib/python3.6/site-packages/ansible/plugins/strategy/__init__.py", line 487, in _process_pending_results
    original_host = get_original_host(task_result._host)
AttributeError: 'Block' object has no attribute '_host'

[Alex Schultz (alex-schultz)]

i think we recently bumped to 2.9.9? maybe a regression there

[Rabi Mishra (rabi)]

Similar error (though not same) seen with undercloud install.

https://e54aca700460cf7abace-2c633db3240f150f6ddf18824372371d.ssl.cf1.rackcdn.com/734470/1/check/tripleo-ci-centos-8-containers-multinode/b1f63a3/logs/undercloud/home/zuul/undercloud_install.log

2020-06-10 21:12:12.812953 | fa163edf-9565-920a-d8f6-000000000f05 | TASK | Include container-puppet tasks for step 1
2020-06-10 21:12:12.813766 | fa163edf-9565-920a-d8f6-000000000f04 | TIMING | Calculate container_puppet_tasks for undercloud step 1 | 0:11:17.283 | 0.10s
2020-06-10 21:12:12.923948 | ad6b7abb-9789-435e-a936-3e3271e465d7 | INCLUDED | /home/zuul/undercloud-ansible-scpztnwk/host-container-puppet-tasks.yaml | undercloud
2020-06-10 21:12:12.968945 | fa163edf-9565-920a-d8f6-0000000023c8 | TASK | Write container-puppet-tasks json file for undercloud step 1
2020-06-10 21:12:12.969489 | fa163edf-9565-920a-d8f6-000000000f05 | TIMING | Include container-puppet tasks for step 1 | 0:11:17.439 | 0.16s
2020-06-10 21:12:13.479638 | fa163edf-9565-920a-d8f6-0000000023c8 | CHANGED | Write container-puppet-tasks json file for undercloud step 1 | undercloud
2020-06-10 21:12:13.528863 | fa163edf-9565-920a-d8f6-0000000023ca | TASK | Generate container puppet configs for step 1
2020-06-10 21:12:13.529413 | fa163edf-9565-920a-d8f6-0000000023c8 | TIMING | Write container-puppet-tasks json file for undercloud step 1 | 0:11:17.999 | 0.56s
2020-06-10 21:12:13.787495 | fa163edf-9565-920a-d8f6-0000000023ca | OK | Generate container puppet configs for step 1 | undercloud
2020-06-10 21:12:13.836205 | fa163edf-9565-920a-d8f6-0000000023cb | TASK | Manage Puppet containers (bootstrap tasks) for step 1 with tripleo-ansible
2020-06-10 21:12:13.836780 | fa163edf-9565-920a-d8f6-0000000023ca | TIMING | Generate container puppet configs for step 1 | 0:11:18.306 | 0.31s
ERROR! Unexpected Exception, this is probably a bug: 'list_iterator' object has no attribute '_host'
to see the full traceback, use -vvv
Ansible execution failed. playbook: deploy_steps_playbook.yaml, Run Status: failed, Return Code: None
Not cleaning working directory /home/zuul/tripleo-heat-installer-templates
Not cleaning ansible directory /home/zuul/undercloud-ansible-scpztnwk
Install artifact is located at /home/zuul/undercloud-install-20200610211214.tar.bzip2

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Alex Schultz (alex-schultz)]

Reported it against ansible, https://github.com/ansible/ansible/issues/70023

[Marios Andreou (marios-b)]

This is an automated action. Bug status has been set to 'Incomplete' and target milestone has been removed due to inactivity. If you disagree please re-set these values and reach out to us on freenode #tripleo