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https://issues.apache.org/jira/browse/KAFKA-14050?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jason Gustafson resolved KAFKA-14050.
-------------------------------------
Resolution: Not A Problem
I'm going to close this since the incompatible schema change did not affect any
released versions.
> Older clients cannot deserialize ApiVersions response with finalized feature
> epoch
> ----------------------------------------------------------------------------------
>
> Key: KAFKA-14050
> URL: https://issues.apache.org/jira/browse/KAFKA-14050
> Project: Kafka
> Issue Type: Bug
> Reporter: Jason Gustafson
> Priority: Blocker
> Fix For: 3.3.0
>
>
> When testing kraft locally, we encountered this exception from an older
> client:
> {code:java}
> [ERROR] 2022-07-05 16:45:01,165 [kafka-admin-client-thread |
> adminclient-1394] org.apache.kafka.common.utils.KafkaThread
> lambda$configureThread$0 - Uncaught exception in thread
> 'kafka-admin-client-thread | adminclient-1394':
> org.apache.kafka.common.protocol.types.SchemaException: Error reading field
> 'api_keys': Error reading array of size 1207959552, only 579 bytes available
> at org.apache.kafka.common.protocol.types.Schema.read(Schema.java:118)
> at
> org.apache.kafka.common.protocol.ApiKeys.parseResponse(ApiKeys.java:378)
> at
> org.apache.kafka.common.protocol.ApiKeys$1.parseResponse(ApiKeys.java:187)
> at
> org.apache.kafka.clients.NetworkClient$DefaultClientInterceptor.parseResponse(NetworkClient.java:1333)
> at
> org.apache.kafka.clients.NetworkClient.parseStructMaybeUpdateThrottleTimeMetrics(NetworkClient.java:752)
> at
> org.apache.kafka.clients.NetworkClient.handleCompletedReceives(NetworkClient.java:888)
> at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:577)
> at
> org.apache.kafka.clients.admin.KafkaAdminClient$AdminClientRunnable.processRequests(KafkaAdminClient.java:1329)
> at
> org.apache.kafka.clients.admin.KafkaAdminClient$AdminClientRunnable.run(KafkaAdminClient.java:1260)
> at java.base/java.lang.Thread.run(Thread.java:832) {code}
> The cause appears to be from a change to the type of the
> `FinalizedFeaturesEpoch` field in the `ApiVersions` response from int32 to
> int64:
> [https://github.com/apache/kafka/pull/9001/files#diff-32006e8becae918416debdb9ac76bf8a1ad12b83aaaf5f8819b6ecc00c1fb56bR58.]
> Fortunately, `FinalizedFeaturesEpoch` is a tagged field, so we can fix this
> by creating a new field. We will have to leave the existing tag in the
> protocol spec and consider it dead.
> Credit for this find goes to [~dajac] .
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