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From Chesnay Schepler <ches...@apache.org>
Subject Re: How to retrieve values from yarn.taskmanager.env in a Job?
Date Mon, 12 Dec 2016 13:36:03 GMT

can you clarify one small thing for me: Do you want to access this 
parameter when you define the plan
(aka when you call methods on the StreamExecutionEnvironment or 
DataStream instances)
or from within your functions/operators?

Chesnay Schepler

On 12.12.2016 14:21, Till Rohrmann wrote:
> Hi Shannon,
> have you tried accessing the environment variables via 
> |System.getenv()|? This should give you a map of string-string key 
> value pairs where the key is the environment variable name.
> If your values are not set in the returned map, then this indicates a 
> bug in Flink and it would be great if you could open a JIRA issue.
> Cheers,
> Till
> ​
> On Fri, Dec 9, 2016 at 7:33 PM, Shannon Carey <scarey@expedia.com 
> <mailto:scarey@expedia.com>> wrote:
>     This thread
>     http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/passing-environment-variables-to-flink-program-td3337.html
>     <http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/passing-environment-variables-to-flink-program-td3337.html>
>     describes the impetus for the addition of yarn.taskmanager.env.
>     I have configured a value within yarn.taskmanager.env, and I see
>     it appearing in the Flink web UI in the list underneath Job
>     Manager -> Configuration. However, I can't figure out how to
>     retrieve the value from within a Flink job. It doesn't appear in
>     the environment, the system properties, or my ParameterTool
>     instance, and I can't figure out how I would get to it via the
>     StreamExecutionEnvironment. Can anyone point me in the right
>     direction?
>     All I want to do is inform my Flink jobs which environment they're
>     running on, so that programmers don't have to specify the
>     environment as a job parameter every time they run it. I also see
>     that there is a "env.java.opts" configuration… does that work in
>     YARN apps (would my jobs be able to see it?)
>     Thanks!
>     Shannon

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