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Posted to commits@airflow.apache.org by "Alex Guziel (JIRA)" <ji...@apache.org> on 2016/12/07 00:17:58 UTC

[jira] [Created] (AIRFLOW-679) Stop concurrent task instances from running due to race conditions

Alex Guziel created AIRFLOW-679:
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             Summary: Stop concurrent task instances from running due to race conditions
                 Key: AIRFLOW-679
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-679
             Project: Apache Airflow
          Issue Type: Improvement
            Reporter: Alex Guziel
            Assignee: Alex Guziel
            Priority: Minor


Right now, multiple copies of the same task instance can run if someone clicks on the UI multiple times. To fix this, I propose two things:

1) Use a transaction to set state to running, and don't run otherwise
2) record hostname and pid in TaskInstance table, then when heartbeating, only continue running if it matches



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