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Travis Brad Ellis commented on KAFKA-8157: ------------------------------------------ I'd like to work this. Newbie here. I sent a request to be added as a contributor via [d...@kafka.apache.org|mailto:d...@kafka.apache.org] . Planning to assign it to myself once added. > Missing "key.serializer" exception when setting "segment index bytes" > --------------------------------------------------------------------- > > Key: KAFKA-8157 > URL: https://issues.apache.org/jira/browse/KAFKA-8157 > Project: Kafka > Issue Type: Bug > Components: streams > Affects Versions: 2.2.0 > Environment: ubuntu 18.10, localhost and Aiven too > Reporter: Cristian D > Priority: Major > Labels: beginner, newbie > > As a `kafka-streams` user, > When I set the "segment index bytes" property > Then I would like to have internal topics with the specified allocated disk > space > > At the moment, when setting the "topic.segment.index.bytes" property, the > application is exiting with following exception: > {code:java} > Exception in thread "main" org.apache.kafka.common.config.ConfigException: > Missing required configuration "key.serializer" which has no default value. > {code} > Tested with `kafka-streams` v2.0.0 and v2.2.0. > > Stack trace: > {code:java} > Exception in thread "main" org.apache.kafka.common.config.ConfigException: > Missing required configuration "key.serializer" which has no default value. > at org.apache.kafka.common.config.ConfigDef.parseValue(ConfigDef.java:474) > at org.apache.kafka.common.config.ConfigDef.parse(ConfigDef.java:464) > at > org.apache.kafka.common.config.AbstractConfig.<init>(AbstractConfig.java:62) > at > org.apache.kafka.common.config.AbstractConfig.<init>(AbstractConfig.java:75) > at > org.apache.kafka.clients.producer.ProducerConfig.<init>(ProducerConfig.java:392) > at > org.apache.kafka.streams.StreamsConfig.getMainConsumerConfigs(StreamsConfig.java:1014) > at > org.apache.kafka.streams.processor.internals.StreamThread.create(StreamThread.java:666) > at org.apache.kafka.streams.KafkaStreams.<init>(KafkaStreams.java:718) > at org.apache.kafka.streams.KafkaStreams.<init>(KafkaStreams.java:634) > at org.apache.kafka.streams.KafkaStreams.<init>(KafkaStreams.java:544) > at app.Main.main(Main.java:36) > {code} > A demo application simulating the exception: > https://github.com/razorcd/java-snippets-and-demo-projects/tree/master/kafkastreamsdemo > > -- This message was sent by Atlassian JIRA (v7.6.3#76005)