GitHub user zhangminglei opened a pull request:

    [FLINK-8212] [network] Pull EnvironmentInformation out of TaskManager…

    ## What is the purpose of the change
    Pull EnvironmentInformation out of TaskManagerServices
    ## Brief change log
    Add inner class ```TaskExecutorEnvironmentInformation``` that can give 
access to the execution environment of the JVM.
    ## Verifying this change
    Run ```NetworkBufferCalculationTest``` is OKay.
    ## Does this pull request potentially affect one of the following parts:
      - Dependencies (does it add or upgrade a dependency): (no)
      - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (no)
      - The serializers: ( no)
      - The runtime per-record code paths (performance sensitive): (  don't 
      - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: ( no )
      - The S3 file system connector: (no)
    ## Documentation
      - Does this pull request introduce a new feature? ( no)
      - If yes, how is the feature documented? (not documented)

You can merge this pull request into a Git repository by running:

    $ git pull flink-8212

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #5458
commit a4792758d3620359f9f42c3bcffbe7578bba4048
Author: zhangminglei <zml13856086071@...>
Date:   2018-02-12T09:21:42Z

    [FLINK-8212] [network] Pull EnvironmentInformation out of 



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