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https://issues.apache.org/jira/browse/AIRFLOW-1099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16767285#comment-16767285
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jack commented on AIRFLOW-1099:
-------------------------------

Airflow doesn't officially supports MS SQL as backend. You should use 
PostgreSQL / MySQL.

> Error "TypeError: Expected bytes, got newbytes" while using MS SQL as 
> metadata database
> ---------------------------------------------------------------------------------------
>
>                 Key: AIRFLOW-1099
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-1099
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: db
>    Affects Versions: 1.8.0
>         Environment: RHEL 6.5; Python 2.7; MS SQL Server 2008
>            Reporter: Marcelo G. Almiron
>            Priority: Major
>         Attachments: traceback.txt
>
>
> When accessing any DAG view from the initial page after log in, I get the 
> error "TypeError: Expected bytes, got newbytes". This error occurs only while 
> using MS SQL as metadata database (I tested with Postgres and works 
> perfectly).
> Traceback is in attachment.



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