我确信这个问题在网上某个地方得到了解决，但我一直找不到它。我仔细阅读了另一个答案，但我不知道如何为Javascript添加新的ScriptEngine。
据我所知，我写了一个Java应用程序，它在任何地方都不使用JavaScript。这是一个使用Maven的Spring应用程序，但在mvn clean package和成功构建之后，运行java -jar app/target/app-X.X.X-SNAPSHOT.jar会得到main ERROR No ScriptEngine found for language js。
有人知道为什么一个不使用JS的项目会抛出一个错误吗？是否有任何已知的方法(甚至文件(来解决它或与ScriptEngine相关的其他问题？
2020-12-10 20:43:50,584 main ERROR No ScriptEngine found for language js. Available languages are:
2020-12-10 20:43:50,641 main ERROR Unable to create file /data/logs/out/out.log java.io.IOException: Could not create directory /data/logs/out
at org.apache.logging.log4j.core.util.FileUtils.mkdir(FileUtils.java:127)
at org.apache.logging.log4j.core.util.FileUtils.makeParentDirs(FileUtils.java:144)
at org.apache.logging.log4j.core.appender.rolling.RollingFileManager$RollingFileManagerFactory.createManager(RollingFileManager.java:650)
at org.apache.logging.log4j.core.appender.rolling.RollingFileManager$RollingFileManagerFactory.createManager(RollingFileManager.java:631)
at org.apache.logging.log4j.core.appender.AbstractManager.getManager(AbstractManager.java:113)
at org.apache.logging.log4j.core.appender.OutputStreamManager.getManager(OutputStreamManager.java:114)
at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.getFileManager(RollingFileManager.java:205)
at org.apache.logging.log4j.core.appender.RollingFileAppender$Builder.build(RollingFileAppender.java:146)
at org.apache.logging.log4j.core.appender.RollingFileAppender$Builder.build(RollingFileAppender.java:62)
at org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:122)
at org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:1002)
at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:942)
at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:934)
at org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:552)
at org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:241)
at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:288)
at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:579)
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:651)
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:668)
at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:253)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:153)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
at org.apache.commons.logging.LogAdapter$Log4jLog.<clinit>(LogAdapter.java:155)
at org.apache.commons.logging.LogAdapter$Log4jAdapter.createLog(LogAdapter.java:122)
at org.apache.commons.logging.LogAdapter.createLog(LogAdapter.java:89)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:67)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:59)
at org.springframework.boot.SpringApplication.<clinit>(SpringApplication.java:196)
at xxx.xxx.xxx.xxx.xxx.Application.main(Application.java:48)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:51)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:52)
由于您的应用程序在Log4J中失败，我假设您在Log4J配置中使用了JavaScript。
JDK 15中删除了JavaScript引擎。参见JEP 372：删除Nashorn JavaScript引擎
一个可能的解决方案是使用Groovy。