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From Madhukar Bharti <bhartimadhu...@gmail.com>
Subject 0.8.2.1 Client not able to connect with Kafka 0.10.0.1 cluster even the cluster has message format version 0.8.2.
Date Tue, 01 Nov 2016 16:13:59 GMT
Hi,

We have upgraded our cluster from 0.8.2.1 to 0.10.0.1. Now
*log.message.format.version* is set to *0.8.2. *
We are still using Kafka 0.8.2.1 jars in client side, when we tried to
fetch consumer offset using BlockingChannel and OffsetFetchRequest as in
example here
<https://cwiki.apache.org/confluence/display/KAFKA/Committing+and+fetching+consumer+offsets+in+Kafka>,
we are getting below exceptions in brokers.

ERROR Closing socket for 172.19.8.200:9092-192.168.1.1:43682 because of
> error (kafka.network.Processor)
> kafka.network.InvalidRequestException: Error getting request for apiKey:
> 10 and apiVersion: 1
>         at
> kafka.network.RequestChannel$Request.liftedTree2$1(RequestChannel.scala:95)
>         at
> kafka.network.RequestChannel$Request.<init>(RequestChannel.scala:87)
>         at
> kafka.network.Processor$$anonfun$processCompletedReceives$1.apply(SocketServer.scala:488)
>         at
> kafka.network.Processor$$anonfun$processCompletedReceives$1.apply(SocketServer.scala:483)
>         at scala.collection.Iterator$class.foreach(Iterator.scala:893)
>         at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
>         at
> scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
>         at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
>         at
> kafka.network.Processor.processCompletedReceives(SocketServer.scala:483)
>         at kafka.network.Processor.run(SocketServer.scala:413)
>         at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.IllegalArgumentException: Invalid version for API key
> 10: 1
>         at
> org.apache.kafka.common.protocol.ProtoUtils.schemaFor(ProtoUtils.java:31)
>         at
> org.apache.kafka.common.protocol.ProtoUtils.requestSchema(ProtoUtils.java:44)
>         at
> org.apache.kafka.common.protocol.ProtoUtils.parseRequest(ProtoUtils.java:60)
>         at
> org.apache.kafka.common.requests.GroupCoordinatorRequest.parse(GroupCoordinatorRequest.java:59)
>         at
> org.apache.kafka.common.requests.AbstractRequest.getRequest(AbstractRequest.java:54)
>         at
> kafka.network.RequestChannel$Request.liftedTree2$1(RequestChannel.scala:92)
>         ... 10 more
>

But, the same code is working fine with Kafka 0.8.2.1 cluster.
I am aware of some protocol changes has been made in Kafka-0.10.X.X but
don't want to update our client to 0.10.0.1 as of now. Is there any way
without updating client the same code will still give the consumer offset.




-- 
Thanks and Regards,
Madhukar Bharti
Mob: 7845755539

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