snuyanzin commented on code in PR #29424:
URL: https://github.com/apache/flink/pull/29424#discussion_r4227074951
##########
flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/operators/window/tvf/unslicing/UnsliceAssigners.java:
##########
@@ -229,7 +229,10 @@ public Collection<TimeWindow> assignWindows(RowData
element, long timestamp)
private TimeWindow createWindow(RowData element) {
if (element.isNullAt(windowStartIndex) ||
element.isNullAt(windowEndIndex)) {
- throw new RuntimeException("RowTime field should not be
null.");
+ throw new IllegalStateException(
+ "Window start or window end of the input row is null. "
+ + "Both should be set by the upstream window
operator. "
+ + "This is a bug. Please file an issue.");
Review Comment:
change only message like
```
throw new RuntimeException("Both window start and window end
should not be null.");
```
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