GitHub user brkyvz opened a pull request:
https://github.com/apache/spark/pull/16716
[SPARK-19378][SS] Ensure continuity of stateOperator and eventTime metrics
even if there is no new data in trigger
## What changes were proposed in this pull request?
In StructuredStreaming, if a new trigger was skipped because no new data
arrived, we suddenly report nothing for the metrics `stateOperator` and
`eventTime`. We could however easily report the metrics from `lastExecution` to
ensure continuity of metrics.
## How was this patch tested?
Regression test in `StreamingQueryStatusAndProgressSuite`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/brkyvz/spark state-agg
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16716.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 #16716
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commit 884a7893f5ae0c388ee79b04f92f62757b8aaea0
Author: Burak Yavuz <[email protected]>
Date: 2017-01-27T00:38:24Z
ready for review
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