dnishimura commented on a change in pull request #918: SAMZA-2094: Implement
the StartpointVisitor for the KafkaSystemConsumer.
URL: https://github.com/apache/samza/pull/918#discussion_r260538851
##########
File path:
samza-core/src/main/scala/org/apache/samza/system/SystemConsumers.scala
##########
@@ -208,7 +223,11 @@ class SystemConsumers (
if (startpoint != null) {
consumer.register(systemStreamPartition, startpoint)
} else {
- consumer.register(systemStreamPartition, offset)
+ val existingOffset = sspToRegisteredOffsets.get(systemStreamPartition)
+ val systemAdmin =
systemAdmins.getSystemAdmin(systemStreamPartition.getSystem)
+ if (existingOffset == null ||
systemAdmin.offsetComparator(existingOffset, offset) > 0) {
+ sspToRegisteredOffsets.put(systemStreamPartition, offset)
Review comment:
Adding to @cameronlee314's comment. What's the motivation for only accepting
the older offset if `register` is called multiple times? When would this
happen? Is it the broadcast stream scenario?
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
