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Posted to jira@kafka.apache.org by GitBox <gi...@apache.org> on 2021/09/22 02:05:44 UTC

[GitHub] [kafka] mjsax commented on a change in pull request #11347: KAFKA-13296: warn if previous assignment has duplicate partitions

mjsax commented on a change in pull request #11347:
URL: https://github.com/apache/kafka/pull/11347#discussion_r713232644



##########
File path: streams/src/main/java/org/apache/kafka/streams/processor/internals/StreamsPartitionAssignor.java
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@@ -351,6 +351,17 @@ public GroupAssignment assign(final Cluster metadata, final GroupSubscription gr
 
             // add the consumer and any info in its subscription to the client
             clientMetadata.addConsumer(consumerId, subscription.ownedPartitions());
+            if (allOwnedPartitions.stream().anyMatch(t -> subscription.ownedPartitions().contains(t))) {
+                log.warn("The previous assignment contains a partition more than once. " +
+                    "This might result in violation of EOS if enabled. \n" +

Review comment:
       Not sure if we need to call out EOS in particular? It's incorrect in any case.

##########
File path: streams/src/main/java/org/apache/kafka/streams/processor/internals/StreamsPartitionAssignor.java
##########
@@ -351,6 +351,17 @@ public GroupAssignment assign(final Cluster metadata, final GroupSubscription gr
 
             // add the consumer and any info in its subscription to the client
             clientMetadata.addConsumer(consumerId, subscription.ownedPartitions());
+            if (allOwnedPartitions.stream().anyMatch(t -> subscription.ownedPartitions().contains(t))) {
+                log.warn("The previous assignment contains a partition more than once. " +
+                    "This might result in violation of EOS if enabled. \n" +

Review comment:
       Wondering if we should print the full old-assignment a single time if we detect any error instead? Would be helpful to get the `client.id -> old-assignment` mapping?




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