GitHub user HeartSaVioR opened a pull request:
https://github.com/apache/spark/pull/21622
[SPARK-24637][SS] Add metrics regarding state and watermark to dropwizard
metrics
## What changes were proposed in this pull request?
The patch adds metrics regarding state and watermark to dropwizard metrics,
so that watermark and state rows/size can be tracked via time-series manner.
## How was this patch tested?
Manually tested with CSV metric sink.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/HeartSaVioR/spark SPARK-24637
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21622.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 #21622
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commit 147c98a94140bae505116f5af4d616dcf8d85eab
Author: Jungtaek Lim <kabhwan@...>
Date: 2018-06-23T08:04:55Z
SPARK-24637 Add metrics regarding state and watermark to dropwizard metrics
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