[jira] [Created] (KAFKA-6855) Kafka fails to start due to faulty Java version detection

[Anders Tornblad (JIRA)]

Anders Tornblad created KAFKA-6855:
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             Summary: Kafka fails to start due to faulty Java version detection
                 Key: KAFKA-6855
                 URL: https://issues.apache.org/jira/browse/KAFKA-6855
             Project: Kafka
          Issue Type: Bug
          Components: core
    Affects Versions: 1.1.0
         Environment: Ubuntu 18.04
Java 10
            Reporter: Anders Tornblad


After downloading fresh installations of ZooKeeper and Kafka, and then starting 
ZooKeeper and Kafka the way that is recommended on 
[http://kafka.apache.org/documentation/#quickstart] the following error message 
is shown:

{{Unrecognized VM option 'PrintGCDateStamps'}}

I found the error in the kafka-run-class.sh file, where the Java version is 
determined and put in the JAVA_MAJOR_VERSION variable. My Java runtime reports 
the version as openjdk version "10.0.1" 2018-04-17, which makes the 
JAVA_MAJOR_VERSION value be "10 2018-04-17" instead of just "10". That makes 
the subsequent if statement fail.

I found the following line to fix the problem:

{{JAVA_MAJOR_VERSION=$($JAVA -version 2>&1 | sed -E -n 's/.* version 
"([^.-]*).*/\1p')}}

 



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