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https://issues.apache.org/jira/browse/KAFKA-9651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17064959#comment-17064959
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ASF GitHub Bot commented on KAFKA-9651:
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guozhangwang commented on pull request #8226: KAFKA-9651: Fix
ArithmeticException (รท by 0) in Partitioner impls
URL: https://github.com/apache/kafka/pull/8226
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> Divide by zero in DefaultPartitioner
> ------------------------------------
>
> Key: KAFKA-9651
> URL: https://issues.apache.org/jira/browse/KAFKA-9651
> Project: Kafka
> Issue Type: Bug
> Reporter: Tom Bentley
> Assignee: Tom Bentley
> Priority: Major
>
> The following exception was observed in a Kafka Streams application running
> on Kafka 2.3:
> java.lang.ArithmeticException: / by zero
> at
> org.apache.kafka.clients.producer.internals.DefaultPartitioner.partition(DefaultPartitioner.java:69)
> at
> org.apache.kafka.streams.processor.internals.DefaultStreamPartitioner.partition(DefaultStreamPartitioner.java:39)
> at
> org.apache.kafka.streams.processor.internals.StreamsMetadataState.getStreamsMetadataForKey(StreamsMetadataState.java:255)
> at
> org.apache.kafka.streams.processor.internals.StreamsMetadataState.getMetadataWithKey(StreamsMetadataState.java:155)
> at
> org.apache.kafka.streams.KafkaStreams.metadataForKey(KafkaStreams.java:1019)
> The cause is that the {{Cluster}} returns an empty list from
> {{partitionsForTopic(topic)}} and the size is then used as a divisor.
> The same pattern of using the size of the partitions as divisor is used in
> other implementations of {{Partitioner}} and also {{StickyPartitionCache}},
> so presumably they're also prone to this problem when {{Cluster}} lacks
> information about a topic.
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