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https://issues.apache.org/jira/browse/AIRFLOW-1038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15954271#comment-15954271
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ASF subversion and git services commented on AIRFLOW-1038:
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Commit 34ee1dc0373708f7db0a562ac470338c6126d20a in incubator-airflow's branch
refs/heads/master from [~saguziel]
[ https://git-wip-us.apache.org/repos/asf?p=incubator-airflow.git;h=34ee1dc ]
[AIRFLOW-1038] Specify celery serialization options explicitly
Specify the CELERY_TASK_SERIALIZER and CELERY_RESULT_SERIALIZER as
pickle explicitly, and CELERY_EVENT_SERIALIZER as json.
> Specify celery serializers explicitly and pin version
> -----------------------------------------------------
>
> Key: AIRFLOW-1038
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1038
> Project: Apache Airflow
> Issue Type: Bug
> Reporter: Alex Guziel
> Assignee: Alex Guziel
> Fix For: 1.9.0
>
>
> Celery 3->4 upgrade changes the default task and result serializer from
> pickle to json. Pickle is faster and supports more types
> http://docs.celeryproject.org/en/latest/userguide/calling.html
> This also causes issues when different versions of celery are running on
> different hosts.
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