lianetm commented on code in PR #16885:
URL: https://github.com/apache/kafka/pull/16885#discussion_r1742239313
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
##########
@@ -1581,48 +1577,27 @@ private Fetch<K, V> collectFetch() {
return fetch;
}
+
/**
* Set the fetch position to the committed position (if there is one)
* or reset it using the offset reset policy the user has configured.
*
- * @throws AuthenticationException If authentication fails. See the
exception for more details
- * @throws NoOffsetForPartitionException If no offset is stored for a
given partition and no offset reset policy is
- * defined
* @return true iff the operation completed without timing out
+ * @throws AuthenticationException If authentication fails. See the
exception for more details
+ * @throws NoOffsetForPartitionException If no offset is stored for a
given partition and no offset reset policy is
+ * defined
*/
private boolean updateFetchPositions(final Timer timer) {
try {
- // Validate positions using the partition leader end offsets, to
detect if any partition
- // has been truncated due to a leader change. This will trigger an
OffsetForLeaderEpoch
- // request, retrieve the partition end offsets, and validate the
current position against it.
- applicationEventHandler.addAndGet(new
ValidatePositionsEvent(calculateDeadlineMs(timer)));
-
- cachedSubscriptionHasAllFetchPositions =
subscriptions.hasAllFetchPositions();
- if (cachedSubscriptionHasAllFetchPositions) return true;
-
- // Reset positions using committed offsets retrieved from the
group coordinator, for any
- // partitions which do not have a valid position and are not
awaiting reset. This will
- // trigger an OffsetFetch request and update positions with the
offsets retrieved. This
- // will only do a coordinator lookup if there are partitions which
have missing
- // positions, so a consumer with manually assigned partitions can
avoid a coordinator
- // dependence by always ensuring that assigned partitions have an
initial position.
- if (isCommittedOffsetsManagementEnabled() &&
!initWithCommittedOffsetsIfNeeded(timer))
- return false;
-
- // If there are partitions still needing a position and a reset
policy is defined,
- // request reset using the default policy. If no reset strategy is
defined and there
- // are partitions with a missing position, then we will raise a
NoOffsetForPartitionException exception.
- subscriptions.resetInitializingPositions();
-
- // Reset positions using partition offsets retrieved from the
leader, for any partitions
- // which are awaiting reset. This will trigger a ListOffset
request, retrieve the
- // partition offsets according to the strategy (ex. earliest,
latest), and update the
- // positions.
- applicationEventHandler.addAndGet(new
ResetPositionsEvent(calculateDeadlineMs(timer)));
- return true;
+ UpdateFetchPositionsEvent updateFetchPositionsEvent = new
UpdateFetchPositionsEvent(calculateDeadlineMs(timer));
+ wakeupTrigger.setActiveTask(updateFetchPositionsEvent.future());
Review Comment:
To ensure that we throw the `WakeupException` if we get a wakeup call while
waiting for the event to complete while polling (part of the contract of poll).
This logic was already in place btw,
[here](https://github.com/apache/kafka/blob/2f9b23625917fed841a176a73bbbc02bfa330a2d/clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java#L1662),
closer to the OffsetFetch, but since it's all in one event now it got moved
here. Makes sense?
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