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https://issues.apache.org/jira/browse/SOLR-15888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17468071#comment-17468071
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Michael Joyner commented on SOLR-15888:
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Ensuring a consistent environment would probably be a good idea.
The following example build.gradle snippet example would ensure a consistent
OpenJDK 11 environment across systems.
// _Requires Gradle 6.8+. Will autodownload the AdoptOpenJDK._
compileJava.options.encoding = 'UTF-8'
compileJava.options.release = 11
compileTestJava.options.encoding = 'UTF-8'
compileTestJava.options.release = 11
java.toolchain.languageVersion = JavaLanguageVersion.of(11)
java.toolchain.vendor = JvmVendorSpec.ADOPTOPENJDK
> Confusing error message when javac is not installed
> ---------------------------------------------------
>
> Key: SOLR-15888
> URL: https://issues.apache.org/jira/browse/SOLR-15888
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Gradle
> Reporter: Andy Lester
> Priority: Minor
>
> I was trying to get gradlew going but did not have the proper
> java-11-openjdk-devel package installed. This meant I didn't have javac
> installed.
> gradlew tries to do compile WrapperDownloader early on, and the error message
> was very confusing:
> {{Exception in thread "main" java.lang.IllegalArgumentException: error:
> release version 11 not supported}}
> {{ at
> jdk.compiler/com.sun.tools.javac.main.Arguments.reportDiag(Arguments.java:891)}}
> {{ at
> jdk.compiler/com.sun.tools.javac.main.Arguments.handleReleaseOptions(Arguments.java:311)}}
> {{ at
> jdk.compiler/com.sun.tools.javac.main.Arguments.processArgs(Arguments.java:350)}}
> {{ at
> jdk.compiler/com.sun.tools.javac.main.Arguments.init(Arguments.java:246)}}
> {{ at
> jdk.compiler/com.sun.tools.javac.api.JavacTool.getTask(JavacTool.java:185)}}
> {{ at
> jdk.compiler/com.sun.tools.javac.api.JavacTool.getTask(JavacTool.java:119)}}
> {{ at
> jdk.compiler/com.sun.tools.javac.launcher.Main.compile(Main.java:364)}}
> {{ at jdk.compiler/com.sun.tools.javac.launcher.Main.run(Main.java:176)}}
> {{ at jdk.compiler/com.sun.tools.javac.launcher.Main.main(Main.java:119)}}
> {{\nSomething went wrong. Make sure you're using Java 11 or later.}}
> The first line says "release version 11 not supported" and the last says
> "Make sure you're using Java 11." Those seem contradictory. [~bunchr] came to
> my rescue and suggested that I needed javac, and that led me to get the right
> package installed.
> (Also, there's an incorrect literal "\n" in the last line)
> Maybe an explicit check for javac before trying to build, and corresponding
> specific error message, would help better identify the problem.
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