AndrewJSchofield commented on code in PR #14912:
URL: https://github.com/apache/kafka/pull/14912#discussion_r1414423829
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clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
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@@ -1169,34 +1169,48 @@ private Fetch<K, V> collectFetch() {
* @return true iff the operation completed without timing out
*/
private boolean updateFetchPositions(final Timer timer) {
- // 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.add(new ValidatePositionsApplicationEvent());
-
- 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();
+ 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.
+ // If the timer is not expired, wait for the validation,
otherwise, just request it.
+ if (timer.notExpired()) {
+ applicationEventHandler.addAndGet(new
ValidatePositionsApplicationEvent(), timer);
+ } else {
+ applicationEventHandler.add(new
ValidatePositionsApplicationEvent());
+ }
Review Comment:
I really ought to change this a bit. The method signature should be
`updateFetchPositions(Timer timer, boolean shouldWait)`. If the caller has
`Duration.ofMillis(0)`, the code will not wait but it should send the async
requests.
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