[
https://issues.apache.org/jira/browse/KAFKA-9701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17056670#comment-17056670
]
Boyang Chen commented on KAFKA-9701:
------------------------------------
Reproduced on trunk as well:
```
[2020-03-10T20:05:27-07:00]
(streams-soak-2-6-eos_soak_i-053ea65a68df40867_streamslog) [2020-03-11
03:05:27,252] INFO
[stream-soak-test-cdaca0fe-8d47-4de5-911e-bb084038d6f5-StreamThread-3]
stream-thread
[stream-soak-test-cdaca0fe-8d47-4de5-911e-bb084038d6f5-StreamThread-3] State
transition from RUNNING to PARTITIONS_ASSIGNED
(org.apache.kafka.streams.processor.internals.StreamThread)
[2020-03-10T20:05:27-07:00]
(streams-soak-2-6-eos_soak_i-053ea65a68df40867_streamslog) [2020-03-11
03:05:27,252] INFO
[stream-soak-test-cdaca0fe-8d47-4de5-911e-bb084038d6f5-StreamThread-3]
stream-client [stream-soak-test-cdaca0fe-8d47-4de5-911e-bb084038d6f5] State
transition from RUNNING to REBALANCING (org.apache.kafka.streams.KafkaStreams)
[2020-03-10T20:05:27-07:00]
(streams-soak-2-6-eos_soak_i-053ea65a68df40867_streamslog) [2020-03-11
03:05:27,252] ERROR
[stream-soak-test-cdaca0fe-8d47-4de5-911e-bb084038d6f5-StreamThread-1]
stream-thread
[stream-soak-test-cdaca0fe-8d47-4de5-911e-bb084038d6f5-StreamThread-1]
Encountered the following exception during processing and the thread is going
to shut down: (org.apache.kafka.streams.processor.internals.StreamThread)
[2020-03-10T20:05:27-07:00]
(streams-soak-2-6-eos_soak_i-053ea65a68df40867_streamslog)
org.apache.kafka.common.errors.InconsistentGroupProtocolException: The group
member's supported protocols are incompatible with those of existing members or
first group member tried to join with empty protocol type or empty protocol
list.
```
> Consumer could catch InconsistentGroupProtocolException during rebalance
> ------------------------------------------------------------------------
>
> Key: KAFKA-9701
> URL: https://issues.apache.org/jira/browse/KAFKA-9701
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 2.5.0
> Reporter: Boyang Chen
> Priority: Major
>
> INFO log shows that we accidentally hit an unexpected inconsistent group
> protocol exception:
> [2020-03-10T17:16:53-07:00]
> (streams-soak-2-5-eos-broker-2-5_soak_i-00067445452c82fe8_streamslog)
> [2020-03-11 *00:16:53,382*] INFO
> [stream-soak-test-d3da8597-c371-450e-81d9-72aea6a26949-StreamThread-1]
> stream-client [stream-soak-test-d3da8597-c371-450e-81d9-72aea6a26949] State
> transition from REBALANCING to RUNNING (org.apache.kafka.streams.KafkaStreams)
>
> [2020-03-10T17:16:53-07:00]
> (streams-soak-2-5-eos-broker-2-5_soak_i-00067445452c82fe8_streamslog)
> [2020-03-11 *00:16:53,384*] WARN [kafka-producer-network-thread |
> stream-soak-test-d3da8597-c371-450e-81d9-72aea6a26949-StreamThread-1-0_1-producer]
> stream-thread
> [stream-soak-test-d3da8597-c371-450e-81d9-72aea6a26949-StreamThread-1] task
> [0_1] Error sending record to topic node-name-repartition due to Producer
> attempted an operation with an old epoch. Either there is a newer producer
> with the same transactionalId, or the producer's transaction has been expired
> by the broker.; No more records will be sent and no more offsets will be
> recorded for this task.
>
>
> [2020-03-10T17:16:53-07:00]
> (streams-soak-2-5-eos-broker-2-5_soak_i-00067445452c82fe8_streamslog)
> [2020-03-11 *00:16:53,521*] INFO
> [stream-soak-test-d3da8597-c371-450e-81d9-72aea6a26949-StreamThread-1]
> [Consumer
> clientId=stream-soak-test-d3da8597-c371-450e-81d9-72aea6a26949-StreamThread-1-consumer,
> groupId=stream-soak-test] Member
> stream-soak-test-d3da8597-c371-450e-81d9-72aea6a26949-StreamThread-1-consumer-d1c3c796-0bfb-4c1c-9fb4-5a807d8b53a2
> sending LeaveGroup request to coordinator
> ip-172-31-20-215.us-west-2.compute.internal:9092 (id: 2147482646 rack: null)
> due to the consumer unsubscribed from all topics
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
>
> [2020-03-10T17:16:54-07:00]
> (streams-soak-2-5-eos-broker-2-5_soak_i-00067445452c82fe8_streamslog)
> [2020-03-11 *00:16:53,798*] ERROR
> [stream-soak-test-d3da8597-c371-450e-81d9-72aea6a26949-StreamThread-1]
> stream-thread
> [stream-soak-test-d3da8597-c371-450e-81d9-72aea6a26949-StreamThread-1]
> Encountered the following unexpected Kafka exception during processing, this
> usually indicate Streams internal errors:
> (org.apache.kafka.streams.processor.internals.StreamThread)
> [2020-03-10T17:16:54-07:00]
> (streams-soak-2-5-eos-broker-2-5_soak_i-00067445452c82fe8_streamslog)
> org.apache.kafka.common.errors.InconsistentGroupProtocolException: The group
> member's supported protocols are incompatible with those of existing members
> or first group member tried to join with empty protocol type or empty
> protocol list.
>
> Potentially needs further log to understand this.
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