I am using airflow 1.8.1 as well. It is able to pick up the rest of the tasks 
when using backfill with the only exception which is when there is a task 
failed and I had to clear the status to allow the backfill to work. Any ideas 
why it is behaving like this? The previous version 1.6.2 didn't require 
clearing the failed task before doing backfill.

Thx a lot,
Viv

> On Jul 5, 2017, at 7:38 AM, Tobias Feldhaus <tobias.feldh...@localsearch.ch> 
> wrote:
> 
> I’ve just pulled the newest master and build it; the behaviour is the same. 
> How can it be that “–i” is not honoured and dependencies are checked?
> 
> 
> On 05.07.2017, 15:49, "Tobias Feldhaus" <tobias.feldh...@localsearch.ch> 
> wrote:
> 
>    But nonetheless, is it not possible to backfill and ignore the upstream 
> dependencies with “-i” ?
> 
>    On 05.07.2017, 14:34, "Tobias Feldhaus" <tobias.feldh...@localsearch.ch> 
> wrote:
> 
>        I meant –i , but I just needed to manually set the upstream things to 
> success and it worked. Nevermind.
> 
>        Best,
>        Tobi
> 
>        On 05.07.2017, 14:28, "Tobias Feldhaus" 
> <tobias.feldh...@localsearch.ch<mailto:tobias.feldh...@localsearch.ch>> wrote:
> 
>        Hi,
> 
>        When running airflow (1.8.1) backfill with –I and –t like:
> 
>        airflow backfill -t 'nonspider_sessions' -i -I -s 2017-05-30 -e 
> 2017-05-31 google_pipelines
> 
>        I would expect it to rerun that specific task and ignoring the 
> dependencies. Instead I see this:
> 
>        [2017-07-05 12:23:30,419] {base_task_runner.py:95} INFO - Subtask: 
> [2017-07-05 12:23:30,419] {models.py:1145} INFO - Dependencies not met for 
> <TaskInstance: google_pipelines.nonspider_sessions 2017-05-30 05:30:00 
> [queued]>, dependency 'Trigger Rule' FAILED: Task's trigger rule 
> 'all_success' requires all upstream tasks to have succeeded, but found 3 
> non-success(es). upstream_tasks_state={'successes': 0L, 'failed': 0L, 
> 'upstream_failed': 0L, 'skipped': 0L, 'done': 0L}, 
> upstream_task_ids=['frontend_sensor', 'log_sensor', 'tracker_pipeline']
> 
>        Am I doing it wrong?
> 
> 
> 
>        Best,
>        Tobi
> 
> 
> 
> 

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