Till Rohrmann created FLINK-26098:
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Summary: TableAPI does not forward idleness configuration from
DataStream
Key: FLINK-26098
URL: https://issues.apache.org/jira/browse/FLINK-26098
Project: Flink
Issue Type: Bug
Components: Table SQL / API
Affects Versions: 1.14.3, 1.15.0
Reporter: Till Rohrmann
The TableAPI does not forward the idleness configuration from a DataStream
source. That can lead to the halt of processing if all sources are idle because
{{WatermarkAssignerOperator}} [1] will never set a channel to active again. The
only way to mitigate the problem is to explicitly configure the idleness for
table sources via {{table.exec.source.idle-timeout}}. Configuring this value is
actually not easy because creating a {{StreamExecutionEnvironment}} via
{{create(StreamExecutionEnvironment, TableConfig)}} is deprecated.
[1]
https://github.com/apache/flink/blob/master/flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/operators/wmassigners/WatermarkAssignerOperator.java#L103
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