Ed Berezitsky created KAFKA-19327:
-------------------------------------
Summary: MM2 Source Connector Fails at Scale
Key: KAFKA-19327
URL: https://issues.apache.org/jira/browse/KAFKA-19327
Project: Kafka
Issue Type: Bug
Components: mirrormaker
Affects Versions: 3.7.2
Reporter: Ed Berezitsky
We are running MM2 to replicate about 1000+ topics with about 25K partitions or
something like that.
{{The MM2 Source Connector fails to start with topics=.*}}
The Exception:
{code:java}
[2025-05-23 16:51:06,501] WARN Could not create topic
<just_one_of_hundreds_failed_topics>.
(org.apache.kafka.connect.mirror.MirrorSourceConnector)
java.util.concurrent.CompletionException:
org.apache.kafka.common.errors.PolicyViolationException: Unable to perform
excessively large batch operation.
at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(Unknown
Source)
at
java.base/java.util.concurrent.CompletableFuture.completeThrowable(Unknown
Source)
at
java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(Unknown
Source)
at java.base/java.util.concurrent.CompletableFuture.postComplete(Unknown
Source)
at
java.base/java.util.concurrent.CompletableFuture.completeExceptionally(Unknown
Source)
at
org.apache.kafka.common.internals.KafkaCompletableFuture.kafkaCompleteExceptionally(KafkaCompletableFuture.java:49)
at
org.apache.kafka.common.internals.KafkaFutureImpl.completeExceptionally(KafkaFutureImpl.java:130)
at
org.apache.kafka.clients.admin.KafkaAdminClient$1.handleResponse(KafkaAdminClient.java:1845)
at
org.apache.kafka.clients.admin.KafkaAdminClient$AdminClientRunnable.handleResponses(KafkaAdminClient.java:1397)
at
org.apache.kafka.clients.admin.KafkaAdminClient$AdminClientRunnable.processRequests(KafkaAdminClient.java:1550)
at
org.apache.kafka.clients.admin.KafkaAdminClient$AdminClientRunnable.run(KafkaAdminClient.java:1473)
at java.base/java.lang.Thread.run(Unknown Source) {code}
MM2 Source Connector tries to create all the topics in a[ single
request|https://github.com/apache/kafka/blob/trunk/connect/mirror/src/main/java/org/apache/kafka/connect/mirror/MirrorSourceConnector.java#L518].
And fails...
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