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From "Nick Bauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AIRFLOW-1641) Task gets stuck in queued state
Date Sun, 22 Oct 2017 21:46:00 GMT

    [ https://issues.apache.org/jira/browse/AIRFLOW-1641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16214462#comment-16214462
] 

Nick Bauer commented on AIRFLOW-1641:
-------------------------------------

I'll try to make some time to test this, but I just recently upgraded our code so our dags
load faster.  it should be pretty easy to test however: Create a dag that takes a long time
to load - like have it sleep. , and set your dagbag import to something small like 5 seconds.

> Task gets stuck in queued state
> -------------------------------
>
>                 Key: AIRFLOW-1641
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-1641
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 1.8.0
>         Environment: Linux
>            Reporter: Mas
>            Assignee: Bolke de Bruin
>              Labels: queued, scheduler, stuck, task
>             Fix For: 1.9.0
>
>
> Hello,
> I have one dag with ~20 tasks. 
> The dags runs daily and some tasks can sometime last for hours, depending on the processed
data behind.
> There are some interactions with AWS and a remote DB.
> I only use LocalExecutor.
> What this issue is about, is the fact that sometime (randomly, and without any clear
reason) one of the tasks (here also, it is random) gets stuck in "queued" state and never
starts running. 
> The manual workaround is to restart the task manually by clearing it.
> Does anyone have ideas about the issue behind, and how to avoid it for the future? 
> Thanks in advance for your help.
> PS: other people are facing the same behaviour: [link|https://stackoverflow.com/questions/45853013/airflow-tasks-get-stuck-at-queued-status-and-never-gets-running]



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