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https://issues.apache.org/jira/browse/BEAM-3061?focusedWorklogId=259124&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-259124
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ASF GitHub Bot logged work on BEAM-3061:
----------------------------------------
Author: ASF GitHub Bot
Created on: 12/Jun/19 22:25
Start Date: 12/Jun/19 22:25
Worklog Time Spent: 10m
Work Description: steveniemitz commented on issue #7805: [BEAM-3061] Done
notifications for BigtableIO.Write
URL: https://github.com/apache/beam/pull/7805#issuecomment-501476973
so thinking back a little more I realized something else. While we have
been focused on the `Wait.on` use case, we're also using the output of this to
feed directly (via a `Sample.any`) into another DoFn. If the bigtable DoFn
didn't emit any elements, the DoFn after it would never be invoked.
The topology looks something like:
```
input
.apply(BigtableIO.write(...)) //write some stuff
.apply(Sample.any()) // wait for the window to close
.apply(ParDo.of(new SomeDoFn())
```
In order for SomeDoFn to actually be invoked, BigtableIO.write needs to emit
(at least one) element.
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Issue Time Tracking
-------------------
Worklog Id: (was: 259124)
Time Spent: 5h 50m (was: 5h 40m)
> BigtableIO should support emitting a sentinel "done" value when a bundle
> completes
> ----------------------------------------------------------------------------------
>
> Key: BEAM-3061
> URL: https://issues.apache.org/jira/browse/BEAM-3061
> Project: Beam
> Issue Type: Improvement
> Components: io-java-gcp
> Reporter: Steve Niemitz
> Assignee: Steve Niemitz
> Priority: Major
> Time Spent: 5h 50m
> Remaining Estimate: 0h
>
> There was some discussion of this on the dev@ mailing list [1]. This
> approach was taken based on discussion there.
> [1]
> https://lists.apache.org/thread.html/949b33782f722a9000c9bf9e37042739c6fd0927589b99752b78d7bd@%3Cdev.beam.apache.org%3E
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