je-ik commented on a change in pull request #13571:
URL: https://github.com/apache/beam/pull/13571#discussion_r545114926
##########
File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/DoFnOperator.java
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@@ -992,7 +997,23 @@ public void onProcessingTime(InternalTimer<ByteBuffer,
TimerData> timer) {
// allow overriding this in ExecutableStageDoFnOperator to set the key
context
protected void fireTimerInternal(ByteBuffer key, TimerData timerData) {
+ long oldHold = keyCoder != null ? keyedStateInternals.minWatermarkHoldMs()
: -1L;
fireTimer(timerData);
+ emitWatermarkIfHoldChanged(oldHold);
+ }
+
+ void emitWatermarkIfHoldChanged(long currentWatermarkHold) {
+ if (keyCoder != null) {
+ long newWatermarkHold = keyedStateInternals.minWatermarkHoldMs();
+ if (newWatermarkHold > currentWatermarkHold) {
+ try {
+ processInputWatermark(false);
+ } catch (Exception ex) {
+ // should not happen
Review comment:
Isn't `IllegalStateException` meat to be used for an illegal state,
which is a state that should not happen? :)
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