grails - heroku push 安装 OpenJDK 1.6 而不是 OpenJDK 1.8

Question

我正在使用带有 heroku 插件的 IntelliJ 14，并且成功连接到 heroku。但是我无法对 heroku 进行更改。

我的应用程序使用 grails 2.5 和 Java 8。

似乎 heroku 正在安装 OpenJDK 1.6 而不是 OpenJDK 1.8。

有什么方法可以强制 heroku 安装 OpenJDK 1.8？

痕迹 :

 12:57:01.488: cd C:\Users\Me\Google Drive\MyWebApp
    12:57:01.488: git -c core.quotepath=false log refs/heads/master --not --remotes=heroku --max-count=1000 --pretty=format:%x01%H%x02%ct%x02%an%x02%at%x02%ae%x02%cn%x02%ce%x02%P%x02%s%x02%b%x02%B%x03 --encoding=UTF-8 -M --name-status -c --
    12:59:24.248: cd C:\Users\Me\Google Drive\MyWebApp
    12:59:24.248: git -c core.quotepath=false push --progress --porcelain heroku refs/heads/master:master --set-upstream
    Fetching repository, done.
    Counting objects: 1633, done.
    Delta compression using up to 8 threads.
    Compressing objects: 100% (1462/1462), done.
    Writing objects: 100% (1633/1633), 53.48 MiB | 188.00 KiB/s, done.
    Total 1633 (delta 703), reused 0 (delta 0)
    -----> Grails app detected
    -----> Grails 2.5.0 app detected
           WARNING: The Grails buildpack is currently in Beta.
    -----> Installing OpenJDK 1.6...done
    -----> Executing ./grailsw -Divy.default.ivy.user.dir=/app/tmp/cache compile --non-interactive
           Downloading http://dist.springframework.org.s3.amazonaws.com/release/GRAILS/grails-2.5.0.zip to /app/.grails/wrapper/grails-2.5.0-download.zip
           .................................................................................
           Extracting /app/.grails/wrapper/grails-2.5.0-download.zip to /app/.grails/wrapper/2.5.0
    Apr 11, 2015 10:15:38 AM org.codehaus.groovy.runtime.m12n.MetaInfExtensionModule newModule
    WARNING: Module [groovy-all] - Unable to load extension class [org.codehaus.groovy.runtime.NioGroovyMethods]
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           | Environment set to development
           | Environment set to development.
           | Environment set to development..
           | Environment set to development...
           | Environment set to development....
           | Environment set to development.....
    -----> Executing ./grailsw -plain-output -Divy.default.ivy.user.dir=/app/tmp/cache war --non-interactive
    Apr 11, 2015 10:16:18 AM org.codehaus.groovy.runtime.m12n.MetaInfExtensionModule newModule
    WARNING: Module [groovy-all] - Unable to load extension class [org.codehaus.groovy.runtime.NioGroovyMethods]
           |Loading Grails 2.5.0
           |Configuring classpath
           .
           |Environment set to production
           .................................
           |Packaging Grails application
           .....................................
           |Compiling 8 GSP files for package [MyWebApp]
           ..
           |Compiling 4 GSP files for package [databaseMigration]
           ..
           |Building WAR file
           .............................................................
           |Precompiling Assets!
           .Error 
           |
           Error executing script War: java/nio/file/FileSystems (Use --stacktrace to see the full trace)
     !     Failed to build app
     !     Push rejected, failed to compile Grails app
    error: failed to push some refs to 'git@heroku.com:MyWebApp.git'
    To git@heroku.com:MyWebApp.git
    !   refs/heads/master:refs/heads/master [remote rejected] (pre-receive hook declined)

BuildConfig.groovy

grails.servlet.version = "2.5" // Change depending on target container compliance (2.5 or 3.0)
grails.project.class.dir = "target/classes"
grails.project.test.class.dir = "target/test-classes"
grails.project.test.reports.dir = "target/test-reports"
grails.project.work.dir = "target/work"
grails.project.target.level = 1.8
grails.project.source.level = 1.8
//grails.project.war.file = "target/${appName}-${appVersion}.war"

grails.project.fork = [
    // configure settings for compilation JVM, note that if you alter the Groovy version forked compilation is required
    //  compile: [maxMemory: 256, minMemory: 64, debug: false, maxPerm: 256, daemon:true],

    // configure settings for the test-app JVM, uses the daemon by default
    test: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, daemon:true],
    // configure settings for the run-app JVM
    run: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
    // configure settings for the run-war JVM
    war: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
    // configure settings for the Console UI JVM
    console: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256]
]

grails.project.dependency.resolver = "maven" // or ivy
grails.project.dependency.resolution = {
    // inherit Grails' default dependencies
    inherits("global") {
        // specify dependency exclusions here; for example, uncomment this to disable ehcache:
        // excludes 'ehcache'
    }
    log "error" // log level of Ivy resolver, either 'error', 'warn', 'info', 'debug' or 'verbose'
    checksums true // Whether to verify checksums on resolve
    legacyResolve false // whether to do a secondary resolve on plugin installation, not advised and here for backwards compatibility

    repositories {
        inherits true // Whether to inherit repository definitions from plugins

        grailsPlugins()
        grailsHome()
        mavenLocal()
        grailsCentral()
        mavenCentral()
        // uncomment these (or add new ones) to enable remote dependency resolution from public Maven repositories
        //mavenRepo "http://repository.codehaus.org"
        //mavenRepo "http://download.java.net/maven/2/"
        //mavenRepo "http://repository.jboss.com/maven2/"
    }

    dependencies {
        // specify dependencies here under either 'build', 'compile', 'runtime', 'test' or 'provided' scopes e.g.
        // runtime 'mysql:mysql-connector-java:5.1.29'
        // runtime 'org.postgresql:postgresql:9.3-1101-jdbc41'
        test "org.grails:grails-datastore-test-support:1.0.2-grails-2.4"
    }

    plugins {
        // plugins for the build system only
        build ":tomcat:7.0.55.2" // or ":tomcat:8.0.20"

        // plugins for the compile step
        compile ":scaffolding:2.1.2"
        compile ':cache:1.1.8'
        compile ":asset-pipeline:2.1.5"
        //compile ":nimble:0.7"

        // plugins needed at runtime but not for compilation
        runtime ":hibernate4:4.3.8.1" // or ":hibernate:3.6.10.18"
        runtime ":database-migration:1.4.0"
        runtime ":jquery:1.11.1"

        // Uncomment these to enable additional asset-pipeline capabilities
        //compile ":sass-asset-pipeline:1.9.0"
        //compile ":less-asset-pipeline:1.10.0"
        //compile ":coffee-asset-pipeline:1.8.0"
        //compile ":handlebars-asset-pipeline:1.3.0.3"
    }
}

Answer 1

是的，有办法安装 OpenJDK 1.8。

为此，您需要创建一个文件 system.properties在项目的根目录中并添加以下行
java.runtime.version=1.8
然后在git中添加并提交文件并推送到heruko。

添加 system.properties 后的控制台日志文件 :

remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Grails app detected
remote: -----> Grails 2.4.4 app detected
remote:        WARNING: The Grails buildpack is currently in Beta.
remote: -----> Installing OpenJDK 1.8...done

添加 system.properties 之前的控制台日志文件 :

remote: -----> Grails app detected
remote: -----> Grails 2.4.4 app detected
remote:        WARNING: The Grails buildpack is currently in Beta.
remote: -----> Installing OpenJDK 1.6...done
.............
remote:        | Installed plugin tomcat-7.0.55.....
remote:        | Compiling 10 source files
remote:   [groovyc] org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
remote:   [groovyc] Invalid commandline usage for javac.
remote:   [groovyc] javac: invalid source release: 1.8
remote:   [groovyc] Usage: javac <options> <source files>

引用: https://devcenter.heroku.com/articles/getting-started-with-grails#optional-choose-a-jdk