eladkal opened a new pull request #20178:
URL: https://github.com/apache/airflow/pull/20178
**Description:**
In cases where task asks for more pool slots than the total number it has
the scheduler generates the following warning:
`[2021-12-09 19:37:51,949] {scheduler_job.py:407} INFO - Not executing
<TaskInstance: a_pool.my_task scheduled__2021-12-09T19:08:00+00:0│172.18.0.10
[scheduled]> since it requires 4 slots but there are 2 open slots in the pool
my_pool. `
https://github.com/apache/airflow/blob/985bb06ba57ab67bb218ca9ca7549a81bea88f87/airflow/jobs/scheduler_job.py#L401-L408
However this message is very confusing as the issue is not with open slots
but with the total slots of the pool. Waiting for slots will not resolve the
problem. To make the task run there must be an action from the user:
1. User to increase the total number of slots in the Pool
2. User need to change the task code to requests less slots.
This PR add specific log notice for this case.
**Testing:**
Added test to cover this case where pool is configured with 2 slots when
task ask for 4 slots.
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