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https://issues.apache.org/jira/browse/KAFKA-4823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15890242#comment-15890242
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bernie huang commented on KAFKA-4823:
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Do you use jdk1.7 package your application jar file,and use this jar run in
jdk1.6?
If so,just like jdk lower version can't run higher version class,maybe you can
package your application jar file use jdk 1.6 and test it again.
> Creating Kafka Producer on application running on Java 1.6
> ----------------------------------------------------------
>
> Key: KAFKA-4823
> URL: https://issues.apache.org/jira/browse/KAFKA-4823
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Affects Versions: 0.10.1.1
> Environment: Application running on Java 1.6
> Reporter: Aneesh
>
> I have an application running on Java 1.6 which cannot be upgraded.This
> application need to have interfaces to post (producer )messages to Kafka
> server remote box.Also receive messages as consumer .The code runs fine from
> my local env which is on java 1.7.But the same producer and consumer fails
> when executed within the application with the error
> Caused by: java.lang.UnsupportedClassVersionError: JVMCFRE003 bad major
> version; class=org/apache/kafka/clients/producer/KafkaProducer, offset=6
> Is there someway I can still do it ?
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