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https://issues.apache.org/jira/browse/AIRFLOW-1466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16601569#comment-16601569
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Apache Spark commented on AIRFLOW-1466:
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User 'idlecool' has created a pull request for this issue:
https://github.com/apache/incubator-airflow/pull/2997
> Hostname does not match domain name on ec2
> ------------------------------------------
>
> Key: AIRFLOW-1466
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1466
> Project: Apache Airflow
> Issue Type: Bug
> Components: core
> Affects Versions: Airflow 1.8
> Environment: AWS EMR 5.6, Amazon Linux AMI release 2017.03
> Reporter: Lulu Cheng
> Assignee: Lulu Cheng
> Priority: Major
>
> When running jobs on EMR master, it'll throw the following error
> {code}
> AirflowException("Hostname of job runner does not match")
> {code}
> upon investigation, taskinstance.hostname is set to ec2 host name whereas
> socket.getfqdn is returning full domain name. It's essentially the same, for
> example ip-1-2-3-4 versus ip-1-2-3-4.ec2.internal.
> Fix is to instead of calling fqdn, call gethostname.
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