wenlong88 commented on a change in pull request #17509:
URL: https://github.com/apache/flink/pull/17509#discussion_r742482235
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File path:
flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/operators/window/slicing/SlicingWindowOperator.java
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@@ -150,6 +158,8 @@ public void open() throws Exception {
getKeyedStateBackend(),
collector,
getRuntimeContext()));
+ // initialize progress of window processor
+ windowProcessor.advanceProgress(currentWatermark);
Review comment:
I think we should not call advanceProgress here, because it may be
possible that advanceProgress would generate outputs, which is not allowed in
open. maybe just add an initialProgess paramter in the constructor?
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