action plugin in collection not loaded if collection keyword in task not defined

[ganeshrn]

SUMMARY

If action plugin with the same name is present in collection and ansible core and if collections keyword is not defined in the paly the action plugin from the core is loaded instead of action plugin in collection

Works fine if collection keyword defined in the play eg:
PB1: https://gist.github.com/ganeshrn/7a7426aec0317277b16be1d9f5c83aed

Fails if collection keyword not defined in play eg:
PB2: https://gist.github.com/ganeshrn/3a2fabb690e29ceb00c02180666d1c83

Collection structure:
https://github.com/ganeshrn/network_collections_migration/tree/master/collections/ansible_collections/arista/eos

Value of collection_list at line for
PB1:

['arista.eos', 'ansible.legacy']

PB2:

[]

ISSUE TYPE

• Bug Report

COMPONENT NAME

lib/ansible/executor/task_executor.py (might be)

ANSIBLE VERSION

$ansible --version
ansible 2.10.0.dev0

CONFIGURATION

OS / ENVIRONMENT

STEPS TO REPRODUCE

https://gist.github.com/ganeshrn/3a2fabb690e29ceb00c02180666d1c83

EXPECTED RESULTS

Should load action plugin from the collection itself even if the collection keyword not defined and the task name is FQCN.

ACTUAL RESULTS

[ansibot]

Files identified in the description:

• lib/ansible/executor/task_executor.py

If these files are inaccurate, please update the component name section of the description or use the !component bot command.

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[samdoran]

cc @nitzmahone

[samdoran]

Fixed by #65078

[ganeshrn]

@samdoran @nitzmahone The PR you referred for this issue does not fix this issue. PR #65078 is specific to network code flow and it is added to allow scenario wherein the network connection plugins is moved to a collection.

This issue is different, not specific to network and seems to be in the generic collection code path. I have shared the reproducer in the issue description.