mxm commented on a change in pull request #12551:
URL: https://github.com/apache/beam/pull/12551#discussion_r469769025
##########
File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/DoFnOperator.java
##########
@@ -1277,7 +1280,13 @@ private void onNewEventTimer(TimerData newTimer) {
"Timer with id %s is not an event time timer!",
newTimer.getTimerId());
if (timerUsesOutputTimestamp(newTimer)) {
- outputTimestampQueue.add(newTimer.getOutputTimestamp().getMillis());
+ outputTimestamps.compute(
+ newTimer.getOutputTimestamp().getMillis(),
+ (k, v) -> {
+ Set<String> timerIds = v == null ? new HashSet<>() : v;
+ timerIds.add(getContextTimerId(newTimer.getTimerId(),
newTimer.getNamespace()));
Review comment:
IMHO there is no need to store the timer id here.
##########
File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/DoFnOperator.java
##########
@@ -1226,7 +1230,7 @@ public TimerInternals timerInternals() {
* fire time of the timer. Used for calculating the output watermark hold.
This avoids fetching
* timer data from the state backend which is expensive if done for each
timer.
*/
- private final PriorityQueue<Long> outputTimestampQueue;
+ private final SortedMap<Long, Set<String>> outputTimestamps = new
TreeMap<>();
Review comment:
This is very expensive in terms of memory.
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