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https://issues.apache.org/jira/browse/FLINK-21126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17271559#comment-17271559
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Thomas Weise commented on FLINK-21126:
--------------------------------------
This environment variable was actually introduced to support Flink
configuration with Kubernetes operators. Not with selected, individual
properties, but to allow the user to supply a complete Flink configuration.
With environment variable substitution, for cases where the substitution is
only possible in the entry point.
> Reconsider FLINK_PROPERTIES
> ---------------------------
>
> Key: FLINK-21126
> URL: https://issues.apache.org/jira/browse/FLINK-21126
> Project: Flink
> Issue Type: Improvement
> Components: Deployment / Scripts
> Reporter: Chesnay Schepler
> Priority: Major
> Fix For: 1.13.0
>
>
> The docker scripts support a {{FLINK_PROPERTIES}} environment variable that
> contains a multi-line string with config options, that is piped into the
> configuration.
> This variable is somewhat redundant, because docker users can also specify a
> list of dynamic properties when starting a container, and Kubernetes users
> are advised to use config maps instead.
> FLIP-161 might also re-introduce new ways to configure Flink via environment
> variables.
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