Grails Heroku部署错误

当我试图将我的Grails项目部署到Heroku时，我遇到了一个错误

remote:        .
remote:        |Compiling 4 GSP files for package [databaseMigration]
remote:        ..
remote:        |Building WAR file
remote:        .................................................................
...................................................
remote:        |Precompiling Assets!
remote:        .Error
remote:        |
remote:        Error executing script War: java/nio/file/FileSystems (Use --stacktrace to see the full trace)
remote:  !     Failed to build app
remote:
remote:  !     Push rejected, failed to compile Grails app
remote:
remote: Verifying deploy....
remote:
remote: !       Push rejected to evening-spire-5280.
remote:
To https://git.heroku.com/evening-spire-5280.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/evening-spire-5280.git'

创建本地war文件时，一切都正常—grails测试war、grails开发war

更新：

正如Burt Beckwit所说，NIO被添加到JDK 7中

OpenJDK1.6会有问题吗

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

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我遇到了同样的问题，并解决了它，将JDK降级为1.7：

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JDK 7中添加了java.nio.file.FileSystems类，但Heroku默认为JDK 8，因此应该可以工作。您是否有配置JDK 6的system.properties文件？是的，我有，在我的文件集java.runtime.version=1.8.0_25-b18中设置java.version=1.8.0_25，在heroku上也是默认的1.8，但是当构建启动时，请参阅openjdk 1.6，您是否按照链接中所述更新了路径？您是否尝试将版本设置为1.8而不是1.8.0_25-b18？