Peter Sinoros-Szabo created KAFKA-12431:
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Summary: Fetch Request/Response without Topic information
Key: KAFKA-12431
URL: https://issues.apache.org/jira/browse/KAFKA-12431
Project: Kafka
Issue Type: Bug
Affects Versions: 2.6.1
Reporter: Peter Sinoros-Szabo
I was running a 6 node Kafka 2.4.1 cluster with protocol and message format
version set to 2.4. I wanted to upgrade the cluster to 2.6.1 and after I
upgraded the 1st broker to 2.6.1 without any configuration change, I noticed
much higher CPU usage on that broker (instead of 25% CPU usage it was ~350%)
and about 3-4x higher network traffic. So I dumped the traffic between the
Kafka client and broker and compared it with the traffic of the same broker
downgraded to 2.4.1.
It seems to me that after I upgraded to 2.6.1, the Fetch requests and responses
are not complete, it is missing the topics part of the Fetch Request, I don't
know for what reason. I guess there should be always a topics part.
I'll attache a screenshot from these messages.
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