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https://issues.apache.org/jira/browse/BEAM-11481?focusedWorklogId=525492&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-525492
]
ASF GitHub Bot logged work on BEAM-11481:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 17/Dec/20 11:04
Start Date: 17/Dec/20 11:04
Worklog Time Spent: 10m
Work Description: mxm commented on a change in pull request #13571:
URL: https://github.com/apache/beam/pull/13571#discussion_r545000289
##########
File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/DoFnOperator.java
##########
@@ -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);
Review comment:
This logic should be removed. All logic which deals with watermark
emission should be handled through `processWatermark`.
##########
File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/DoFnOperator.java
##########
@@ -739,9 +741,12 @@ public final void processWatermark1(Watermark mark) throws
Exception {
}
currentInputWatermark = mark.getTimestamp();
Review comment:
We need the following to generalize watermark emission to be able to
call this method from other places.
```
if (mark.getTimestamp > currentInputWatermark) {
currentInputWatermark = mark.getTimestamp();
}
##########
File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/DoFnOperator.java
##########
@@ -739,9 +741,12 @@ public final void processWatermark1(Watermark mark) throws
Exception {
}
currentInputWatermark = mark.getTimestamp();
+ processInputWatermark(true);
+ }
+ private void processInputWatermark(boolean advanceInputWatermark) throws
Exception {
Review comment:
Please remove if we don't want to scatter the logic about watermark
advancement.
##########
File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/DoFnOperator.java
##########
@@ -784,7 +789,7 @@ private long computeOutputWatermark(long
inputWatermarkHold) {
return potentialOutputWatermark;
}
- private void maybeEmitWatermark(long watermark) {
+ void maybeEmitWatermark(long watermark) {
Review comment:
We remove the `private` modifier?
##########
File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/DoFnOperator.java
##########
@@ -641,8 +641,10 @@ protected final void setBundleFinishedCallback(Runnable
callback) {
@Override
public final void processElement(StreamRecord<WindowedValue<InputT>>
streamRecord) {
checkInvokeStartBundle();
+ long oldHold = keyCoder != null ? keyedStateInternals.minWatermarkHoldMs()
: -1L;
doFnRunner.processElement(streamRecord.getValue());
checkInvokeFinishBundleByCount();
+ emitWatermarkIfHoldChanged(oldHold);
Review comment:
Is this required on every element? I'd rather trigger this only if we
set / remove a hold.
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Issue Time Tracking
-------------------
Worklog Id: (was: 525492)
Time Spent: 50m (was: 40m)
> FlinkRunner might not advance output watermark on change of watermark hold
> --------------------------------------------------------------------------
>
> Key: BEAM-11481
> URL: https://issues.apache.org/jira/browse/BEAM-11481
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Affects Versions: 2.26.0
> Reporter: Jan Lukavský
> Assignee: Jan Lukavský
> Priority: P0
> Fix For: 2.27.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Output watermark of DoFnOperator is advanced only when new input watermark is
> received. The output watermark might advance even on timer or processed
> element due to updated watermark hold. This especially holds true in
> splittable DoFn.
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