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

["Ismael Juma (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-6855?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ismael Juma reassigned KAFKA-6855:
----------------------------------

    Assignee: Ismael Juma

> 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
>            Assignee: Ismael Juma
>            Priority: Major
>
> 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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