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From "Craig Foster (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-6222) YARN: setting environment variables in an easier fashion
Date Fri, 17 Nov 2017 21:34:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-6222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16257610#comment-16257610
] 

Craig Foster commented on FLINK-6222:
-------------------------------------

I'm submitting a patch here to see if we can move this along. 

> YARN: setting environment variables in an easier fashion
> --------------------------------------------------------
>
>                 Key: FLINK-6222
>                 URL: https://issues.apache.org/jira/browse/FLINK-6222
>             Project: Flink
>          Issue Type: Improvement
>          Components: Startup Shell Scripts
>    Affects Versions: 1.2.0
>         Environment: YARN, EMR
>            Reporter: Craig Foster
>
> Right now we require end-users to set YARN_CONF_DIR or HADOOP_CONF_DIR and sometimes
FLINK_CONF_DIR.
> For example, in [1], it is stated: 
> “Please note that the Client requires the YARN_CONF_DIR or HADOOP_CONF_DIR environment
variable to be set to read the YARN and HDFS configuration.” 
> In BigTop, we set this with /etc/flink/default and then a wrapper is created to source
that. However, this is slightly cumbersome and we don't have a central place within the Flink
project itself to source environment variables. config.sh could do this but it doesn't have
information about FLINK_CONF_DIR. For YARN and Hadoop variables, I already have a solution
that would add "env.yarn.confdir" and "env.hadoop.confdir" variables to the flink-conf.yaml
file and then we just symlink /etc/lib/flink/conf/ and /etc/flink/conf. 
> But we could also add a flink-env.sh file to set these variables and decouple them from
config.sh entirely. 
> I'd like to know the opinion/preference of others and what would be more amenable. 



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