Cristian Opris created SPARK-18721:
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Summary: ForeachSink breaks Watermark in append mode
Key: SPARK-18721
URL: https://issues.apache.org/jira/browse/SPARK-18721
Project: Spark
Issue Type: Bug
Components: Structured Streaming
Affects Versions: 2.1.0
Reporter: Cristian Opris
Priority: Critical
The watermark is not updated in append mode with a ForeachSink
Because ForeachSink creates a separate IncrementalExecution instance, the
physical plan will be recreated for the logical plan, which results in a new
EventTimeWatermarkExec operator being created, that's unreachable from
StreamExecution. This results in the watermark never being updated, and append
mode never emits results.
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