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https://issues.apache.org/jira/browse/AIRFLOW-4363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17066952#comment-17066952
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ASF GitHub Bot commented on AIRFLOW-4363:
-----------------------------------------

dimberman commented on pull request #7628: [AIRFLOW-4363] Fix JSON encoding 
error
URL: https://github.com/apache/airflow/pull/7628
 
 
   
 
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> Encounter JSON Decode Error when using docker operator
> ------------------------------------------------------
>
>                 Key: AIRFLOW-4363
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-4363
>             Project: Apache Airflow
>          Issue Type: Bug
>         Environment: - Mac OS 10.14
> - python 3.6.8
> - airflow 1.10.2
>            Reporter: Ben Chen
>            Assignee: Ben Chen
>            Priority: Blocker
>
> *[Description]* . 
> When using the docker_operator, I experienced some issue while using Mac OS 
> 10.14.4. The error was json.JSONDecodeError. After my investigation about 
> this error, I found that there are several messages for logging aren't well 
> separated, for example it contains \n inside one single message which should 
> be split into 2 to more different messages.
> *[Update]*  
> Confirmed that issue came from the implementation in airflow, issue cannot be 
> solved by just passing `decode` to parameter in docker.pull method in docker 
> api.
> *[Solution]* . 
>  For now, I use try-catch to run the original implementation, and in the 
> exception part I split the message to list and then parse it. Looking for 
> simpler solution to this non critical but still blocking point.
> *[Logs]*  
> {docker_operator.py:188}
> INFO - Starting docker container from image hello-world
> {docker_operator.py:202}
> INFO - Pulling docker image hello-world
> {docker_operator.py:207}
> INFO - Pulling from library/hello-world
> {docker_operator.py:207}
> INFO - Pulling fs layer
> {docker_operator.py:207}
> INFO - Downloading
> {docker_operator.py:207}
> INFO - Downloading
> {docker_operator.py:207}
> INFO - Download complete
> {docker_operator.py:207}
> INFO - Extracting
> {docker_operator.py:207}
> INFO - Extracting
> {docker_operator.py:207}
> INFO - Pull complete
> {docker_operator.py:207}
> INFO - Digest: 
> sha256:92695bc579f31df7a63da6922075d0666e565ceccad16b59c3374d2cf4e8e50e
> {docker_operator.py:207}
> INFO - Pulling from library/hello-world
> {docker_operator.py:207}
> INFO - Digest: 
> sha256:1a67c1115b199aa9d964d5da5646917cbac2d5450c71a1deed7b1bfb79c2c82d
> {models.py:1788}
> ERROR - Extra data: line 2 column 1 (char 70)
>  Traceback (most recent call last):
>  line 1657, in _run_raw_task, result = task_copy.execute(context=context)
>  line 205, in execute output = json.loads(line)
>  line 354, in loads, return _default_decoder.decode(s)
>  line 342, in decode, raise JSONDecodeError("Extra data", s, end)
>  json.decoder.JSONDecodeError: Extra data: line 2 column 1 (char 70)



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