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https://issues.apache.org/jira/browse/SOLR-12141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16414692#comment-16414692
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Uwe Schindler commented on SOLR-12141:
--------------------------------------
I tested Linux - Same issue (alphabetic comparison, not numeric):
{noformat}
thetaphi@serv1:~/solr-7.3.0/bin$ ./solr start -e techproducts
Your current version of Java is too old to run this version of Solr
We found version 10, using command
'/home/jenkins/tools/java/64bit/jdk-10/bin/java -version', with response:
openjdk version "10" 2018-03-20
OpenJDK Runtime Environment 18.3 (build 10+46)
OpenJDK 64-Bit Server VM 18.3 (build 10+46, mixed mode)
Please install latest version of Java 1.8 or set JAVA_HOME properly.
Debug information:
JAVA_HOME: /home/jenkins/tools/java/64bit/jdk-10
Active Path:
/home/jenkins/tools/java/64bit/jdk-10/bin/:/home/thetaphi/apache-ant-1.8.4/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
{noformat}
> Solr does not start on Windows with Java 10
> -------------------------------------------
>
> Key: SOLR-12141
> URL: https://issues.apache.org/jira/browse/SOLR-12141
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: scripts and tools
> Affects Versions: 7.0, 7.1, 7.2, 7.3
> Environment: Windows 10 with Java 10+
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Priority: Blocker
> Fix For: 7.3
>
> Attachments: SOLR-12141.patch, SOLR-12141.patch, SOLR-12141.patch,
> SOLR-12141.patch
>
>
> If you try to start Solr on Windows with Java 10, it fails with the following
> message:
> {noformat}
> C:\Users\Uwe Schindler\Desktop\solr-7.3.0\bin>solr start -e techproducts
> ERROR: Java 1.8 or later is required to run Solr. Current Java version is: 10
> {noformat}
> Java 8 and Java 9 works. I did not try Linux, but the version parsing on
> Windows is so braindead (i tried to fix it for Java 9 already). Windows CMD
> shell does not know any numerical comparisons, so it fails as "10" is
> alphabetically smaller "9".
> I hope this is better on Linux.
> Why do we have the version check at all? Wouldn't it be better to simply wait
> for a useful message by the Java VM on startup because of wrong class file
> format? This is too simply to break, especially as the output of "java
> -version" is not standardized (and changes with Java 10 to also have a date
> code,...). It also may contain "openjdk" instead of "java".
> So please please, let's get rid of the version check!
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