Vasudevan Seshadri created KAFKA-7328:
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             Summary: Java version for Kafka
                 Key: KAFKA-7328
                 URL: https://issues.apache.org/jira/browse/KAFKA-7328
             Project: Kafka
          Issue Type: Improvement
          Components: documentation
    Affects Versions: 2.0.0
            Reporter: Vasudevan Seshadri


Kafka-zookeeper runs very well on Java 1.6, while all other components like 
kafka-server or kafka-consumer or kafka-topic doesn't run on Java 1.6.

Error was: unsuported minor.major.version 52

I downloaded the latest version of Kafka from - 
[https://www.apache.org/dyn/closer.cgi?path=/kafka/2.0.0/kafka_2.11-2.0.0.tgz]

Suggestion: I think following has to be implemented

1. Quick Start Page (https://kafka.apache.org/quickstart) : Clearly mention the 
pre-requisites as Java 1.8+ 

2. Also, add checks in starter scripts to check Java version. If it's not a 
compatible version of Java, don't even start anything and call out clearly. 

While kafka-zookeeper was running without any issues and others had issues, it 
took a while to identify what the actual problem and had to search the 
documentation section 6.4 to understand Java 1.8 is required.

 

Thanks,

Vasu



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