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https://issues.apache.org/jira/browse/AIRFLOW-962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15924835#comment-15924835
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Bolke de Bruin commented on AIRFLOW-962:
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please test on 1.8.0 (rc5)
> Dag runs are deadlocked for DAG scheduled for @once
> ---------------------------------------------------
>
> Key: AIRFLOW-962
> URL: https://issues.apache.org/jira/browse/AIRFLOW-962
> Project: Apache Airflow
> Issue Type: Bug
> Components: DagRun
> Environment: airflow v1.7.1.3 installed AWS cluster node
> with celery executor ,rabbitMQ service and mysql for meta store
> Reporter: Sheikh Aslam Ahmed
>
> We read mysql table row from python script and create dags out of it, any
> change in the row leads to change in the dag.
> we schedule dag based on inputs(like @once,hourly, daily etc).
> From last few days hourly and other scheduled profiles run properly but
> profile with schedule @once got failed (on web UI no task got picked up from
> the DAG). the error in the logs shows message as ' {jobs.py:538} ERROR - Dag
> runs are deadlocked for DAG: dagname'
> after that if we trigger a manual run for same DAG from web UI it run and
> complete successfully.
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