Tom Bentley created KAFKA-9651:
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Summary: 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
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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