Unexpected error code 9 while fetching data

[hiashishkm]

Hi team,

MySpring-boot application uses spring integration based Kafka client to connect to Azure event hub for retrieving or publishing messages. This application was running fine since 450 days as a containerized application shipping logs to Azure app insights and there were no issues reported.

Spring boot version - 1.5.8.RELEASE
Spring integration kafka dependency -
org.springframework.integration
spring-integration-kafka
2.3.0.RELEASE

We started seeing a huge spike in the logs with the following error -
java.lang.IllegalStateException: Unexpected error code 9 while fetching data
at org.apache.kafka.clients.consumer.internals.Fetcher.parseCompletedFetch(Fetcher.java:886)
at org.apache.kafka.clients.consumer.internals.Fetcher.fetchedRecords(Fetcher.java:525)
at org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1086)
at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1043)
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:614)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.lang.Thread.run(Thread.java:748)

Previously saw similar errors related to error code 13 posted on this forum hence posting this issue as well to get a resolution