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https://issues.apache.org/jira/browse/AIRFLOW-2416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16567121#comment-16567121
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Cameron Moberg commented on AIRFLOW-2416:
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Appears to be fixed in 1.10.0 with this commit.
https://github.com/apache/incubator-airflow/commit/c0920efc012468681cff3d3c9cfe25c7381dc976#diff-2a9d71ae3b365845596dbeef6ec0a17e
> executor_config column in task_instance isn't getting created
> -------------------------------------------------------------
>
> Key: AIRFLOW-2416
> URL: https://issues.apache.org/jira/browse/AIRFLOW-2416
> Project: Apache Airflow
> Issue Type: Bug
> Components: db
> Affects Versions: 1.9.0
> Environment: Running on a mac (System Version: OS X 10.11.6
> (15G19009)) dev environment with Python 3.6.
> Reporter: Curtis Deems
> Assignee: Cameron Moberg
> Priority: Major
>
> There's a new column called 'executor_config' in the 'task_instance' table
> that the scheduler is attempting to query. The column isn't created with
> initdb or upgradedb so the scheduler just loops and never picks up any dag
> objects. The only way I discovered this was to run the scheduler thru the
> debugger and review the exceptions thrown by the scheduler. This issue
> doesn't show up in the scheduler logs or any other output that I could see.
> The workaround is to create the column manually but since the root issue is
> not easily discoverable this could be a blocker for some people.
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