kafka: error decoding packet: invalid array length

[yehaotong]

[[[[##### Versions

Please specify real version numbers or git SHAs, not just "Latest" since that changes fairly regularly.

Sarama	Kafka	Go

Configuration

What configuration values are you using for Sarama and Kafka?

Logs

When filing an issue please provide logs from Sarama and Kafka if at all
possible. You can set sarama.Logger to a log.Logger to capture Sarama debug
output.

logs: CLICK ME

Problem Description

](kafka: error decoding packet: invalid array length)]

[dnwe]

@yehaotong this generally means that the server has sent a response in a version that we don’t yet understand or haven’t correctly added support for, but we’d need to know your config settings, your broker version(s) and some sarama debug logs as per the issue template

[yehaotong]

@yehaotong this generally means that the server has sent a response in a version that we don’t yet understand or haven’t correctly added support for, but we’d need to know your config settings, your broker version(s) and some sarama debug logs as per the issue template

I use the kafka-exporter to scrape kafka metrics, and it miss some consumergroup metric,and I find the log on the kafka-exporter: Cannot get consumer group: kafka: error decoding packet: invalid array length

[yehaotong]

@yehaotong this generally means that the server has sent a response in a version that we don’t yet understand or haven’t correctly added support for, but we’d need to know your config settings, your broker version(s) and some sarama debug logs as per the issue template

the sarama version is: 1.38.1 , and the kafka version is: confluentinc/cp-kafka:5.0.3

[dnwe]

Hmm, I know the DescribeGroups response is somewhat undocumented in the member metadata area. I did fixup some issues in #2111 in the past but it sounds like kafka-exporter would already have that fix

[dnwe]

cp-kafka:5.0.3, so Kafka 2.0.1 afaik. What clients do you have connected to your (missing) consumer group?

[yehaotong]

cp-kafka:5.0.3, so Kafka 2.0.1 afaik. What clients do you have connected to your (missing) consumer group?

what is mean clients connected to consumer group?
the missing consumer group can still scrape a few days ago, but at a certain moment, some indicators of the consumer group are all lost at the same time，and log begins to appear Cannot get consumer group: kafka: error decoding packet: invalid array length

[dnwe]

My guess is that something about the metadata recorded by the consumers in the group is causing the decoding error when Sarama describes it, but I’m not sure what clients you are using in the group to actually consume the messages

[yehaotong]

My guess is that something about the metadata recorded by the consumers in the group is causing the decoding error when Sarama describes it, but I’m not sure what clients you are using in the group to actually consume the messages

How should I verify if there are any issues with the metadata you mentioned

[github-actions]

Thank you for taking the time to raise this issue. However, it has not had any activity on it in the past 90 days and will be closed in 30 days if no updates occur.
Please check if the main branch has already resolved the issue since it was raised. If you believe the issue is still valid and you would like input from the maintainers then please comment to ask for it to be reviewed.