Diego Louzán created KAFKA-6238:
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             Summary: Issues with protocol version when applying a rolling 
upgrade to 1.0.0
                 Key: KAFKA-6238
                 URL: https://issues.apache.org/jira/browse/KAFKA-6238
             Project: Kafka
          Issue Type: Bug
          Components: documentation
    Affects Versions: 1.0.0
            Reporter: Diego Louzán


Hello,

I am trying to perform a rolling upgrade from 0.10.0.1 to 1.0.0, and according 
to the instructions in the documentation, I should only have to upgrade the 
"inter.broker.protocol.version" parameter in the first step. But after setting 
the value to "0.10.0" or "0.10.0.1" (tried both), the broker refuses to start 
with the following error:

{code}
[2017-11-20 08:28:46,620] FATAL  (kafka.Kafka$)
java.lang.IllegalArgumentException: requirement failed: 
log.message.format.version 1.0-IV0 cannot be used when 
inter.broker.protocol.version is set to 0.10.0.1
        at scala.Predef$.require(Predef.scala:224)
        at kafka.server.KafkaConfig.validateValues(KafkaConfig.scala:1205)
        at kafka.server.KafkaConfig.<init>(KafkaConfig.scala:1170)
        at kafka.server.KafkaConfig$.fromProps(KafkaConfig.scala:881)
        at kafka.server.KafkaConfig$.fromProps(KafkaConfig.scala:878)
        at 
kafka.server.KafkaServerStartable$.fromProps(KafkaServerStartable.scala:28)
        at kafka.Kafka$.main(Kafka.scala:82)
        at kafka.Kafka.main(Kafka.scala)
{code}

I checked the instructions for rolling upgrades to previous versions (namely 
0.11.0.0), and in here it's stated that is also needed to upgrade the 
"log.message.format.version" parameter in two stages. I have tried that and the 
upgrade worked. It seems it still applies to version 1.0.0, so I'm not sure if 
this is wrong documentation, or an actual issue with kafka since it should work 
as stated in the docs.

Regards,
Diego Louzán



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