CrynetLogistics commented on a change in pull request #18651:
URL: https://github.com/apache/flink/pull/18651#discussion_r813037580
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File path:
flink-connectors/flink-connector-base/src/main/java/org/apache/flink/connector/base/sink/writer/AsyncSinkWriter.java
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@@ -290,17 +290,33 @@ private void registerCallback() {
@Override
public void write(InputT element, Context context) throws IOException,
InterruptedException {
while (bufferedRequestEntries.size() >= maxBufferedRequests) {
- mailboxExecutor.tryYield();
+ flush();
}
addEntryToBuffer(elementConverter.apply(element, context), false);
- flushIfAble();
+ nonBlockingFlush();
}
- private void flushIfAble() {
- while (bufferedRequestEntries.size() >= maxBatchSize
- || bufferedRequestEntriesTotalSizeInBytes >=
maxBatchSizeInBytes) {
+ /**
+ * Determines if a call to flush will be non-blocking (i.e. {@code
inFlightRequestsCount} is
+ * strictly smaller than {@code maxInFlightRequests}). Also requires one
of the following
+ * requirements to be met:
+ *
+ * <ul>
+ * <li>The number of elements buffered is greater than or equal to the
{@code maxBatchSize}
+ * <li>The sum of the size in bytes of all records in the buffer is
greater than or equal to
+ * {@code maxBatchSizeInBytes}
+ * </ul>
+ */
+ private void nonBlockingFlush() {
+ boolean uncompletedInFlightResponses = true;
+ while (uncompletedInFlightResponses) {
+ uncompletedInFlightResponses = mailboxExecutor.tryYield();
+ }
+ while (inFlightRequestsCount < maxInFlightRequests
+ && (bufferedRequestEntries.size() >= maxBatchSize
+ || bufferedRequestEntriesTotalSizeInBytes >=
maxBatchSizeInBytes)) {
Review comment:
3. I have added a condition here to only call `flush()` if we know
beforehand it is not blocking. This is desirable because the element to be
written has already been added to the buffer, so should not proceed to flush
unless we are certain that operation will not block.
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