GitHub user guoxiaolongzte opened a pull request:
https://github.com/apache/spark/pull/18348
[SPARK-21120][CORE] Increasing the master's metric is conducive to the
spark cluster management system monitoring.
## What changes were proposed in this pull request?
The current number of master metric is very small, unable to meet the needs
of spark large-scale cluster management system. So I am as much as possible to
complete the relevant metric.
fix after master metrics:

## How was this patch tested?
manual tests
Please review http://spark.apache.org/contributing.html before opening a
pull request.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/guoxiaolongzte/spark SPARK-21120
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18348.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #18348
----
commit 43bb484a980f314a7ad63a85439b56c1342f3b1d
Author: guoxiaolong <[email protected]>
Date: 2017-06-19T02:47:27Z
[SPARK-21120] Increasing the master's metric is conducive to the spark
cluster management system monitoring.
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