[jira] [Comment Edited] (AIRFLOW-401) scheduler gets stuck without a trace

["Bolke de Bruin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AIRFLOW-401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16089429#comment-16089429 ] 

Bolke de Bruin edited comment on AIRFLOW-401 at 7/17/17 7:32 AM:
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[~sudowork@gmail.com] It is expected behaviour as the LocalExecutor runs _in process_. Use 1.8.1+ and do not use "-n 5" and you will not encounter the issue with LocalExecutor.


was (Author: bolke):
[~sudowork@gmail.com] It is expected behaviour as the LocalExecutor runs _in process_. Use 1.8.1+ and do not use "-n 5" and you will not encounter the issue.

> scheduler gets stuck without a trace
> ------------------------------------
>
>                 Key: AIRFLOW-401
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-401
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: executor, scheduler
>    Affects Versions: Airflow 1.7.1.3
>            Reporter: Nadeem Ahmed Nazeer
>            Assignee: Bolke de Bruin
>            Priority: Minor
>         Attachments: Dag_code.txt, schduler_cpu100%.png, scheduler_stuck_7hours.png, scheduler_stuck.png
>
>
> The scheduler gets stuck without a trace or error. When this happens, the CPU usage of scheduler service is at 100%. No jobs get submitted and everything comes to a halt. Looks it goes into some kind of infinite loop. 
> The only way I could make it run again is by manually restarting the scheduler service. But again, after running some tasks it gets stuck. I've tried with both Celery and Local executors but same issue occurs. I am using the -n 3 parameter while starting scheduler. 
> Scheduler configs,
> job_heartbeat_sec = 5
> scheduler_heartbeat_sec = 5
> executor = LocalExecutor
> parallelism = 32
> Please help. I would be happy to provide any other information needed



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