Manikumar commented on KAFKA-6524:

exclude.internal.topics only for consumer clients. We can consume from internal 
topics. But producers can not write  to internal topics.

> kafka mirror can't producer internal topic 
> -------------------------------------------
>                 Key: KAFKA-6524
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6524
>             Project: Kafka
>          Issue Type: Bug
>          Components: producer 
>    Affects Versions: 1.0.0
>            Reporter: Ahmed Madkour
>            Priority: Minor
> We are using kafka-mirror-maker.sh to consume data from a 3 brokers kafka 
> cluster and producer the data to another single broker kafka cluster
> We want to include internal topics so we added the following in the consumer 
> configuration
> exclude.internal.topics=false
> We keep receiving the following errors:
> {code:java}
> org.apache.kafka.common.errors.InvalidTopicException: The request attempted 
> to perform an operation on an invalid topic.
>  ERROR Error when sending message to topic __consumer_offsets with key: 43 
> bytes, value: 28 bytes with error: 
> (org.apache.kafka.clients.producer.internals.ErrorLoggingCallback)
> {code}
> It seems that the producer can't access the internal topic __consumer_offsets.
> Any way to fix that?

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