无法识别的 VM 选项 \'MaxPermSize=512m\' 并且在运行 React Native Apps 时无法创建 Java 虚拟机（已关闭）

Question

我尝试使用此命令运行本机应用程序。

npx react-native run-android --variant=stagingDebug --appId com.xx_staging

但我收到此错误消息。我想要在我的机器上运行多个 java 版本.我怎样才能做到这一点？我也不想改变MaxPermSize=512m.我想保留MaxPermSize=512m照原样。

npm WARN config global `--global`, `--local` are deprecated. Use `--location=global` instead.
info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 2228 file(s) to forward-jetify. Using 4 workers...
info Starting JS server...
'"adb"' is not recognized as an internal or external command,
operable program or batch file.
info Launching emulator...
error Failed to launch emulator. Reason: No emulators found as an output of `emulator -list-avds`.
warn Please launch an emulator manually or connect a device. Otherwise app may fail to launch.
info Installing the app...
Starting a Gradle Daemon (subsequent builds will be faster)

FAILURE: Build failed with an exception.

* What went wrong:
Unable to start the daemon process.
This problem might be caused by incorrect configuration of the daemon.
For example, an unrecognized jvm option is used.
Please refer to the User Manual chapter on the daemon at https://docs.gradle.org/6.7/userguide/gradle_daemon.html
Process command line: C:\Program Files\Java\jdk-18.0.2.1\bin\java.exe -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.lang.invoke=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED -Xmx2048m -Dfile.encoding=UTF-8 -Duser.country=US -Duser.language=en -Duser.variant -cp C:\Users\rbza9\.gradle\wrapper\dists\gradle-6.7-all\cuy9mc7upwgwgeb72wkcrupxe\gradle-6.7\lib\gradle-launcher-6.7.jar org.gradle.launcher.daemon.bootstrap.GradleDaemon 6.7
Please read the following process output to find out more:
-----------------------
Unrecognized VM option 'MaxPermSize=512m'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.


* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup.
Error: Command failed: gradlew.bat app:installStagingDebug -PreactNativeDevServerPort=8081

FAILURE: Build failed with an exception.

* What went wrong:
Unable to start the daemon process.
This problem might be caused by incorrect configuration of the daemon.
For example, an unrecognized jvm option is used.
Please refer to the User Manual chapter on the daemon at https://docs.gradle.org/6.7/userguide/gradle_daemon.html
Process command line: C:\Program Files\Java\jdk-18.0.2.1\bin\java.exe -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.lang.invoke=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED -Xmx2048m -Dfile.encoding=UTF-8 -Duser.country=US -Duser.language=en -Duser.variant -cp C:\Users\rbza9\.gradle\wrapper\dists\gradle-6.7-all\cuy9mc7upwgwgeb72wkcrupxe\gradle-6.7\lib\gradle-launcher-6.7.jar org.gradle.launcher.daemon.bootstrap.GradleDaemon 6.7
Please read the following process output to find out more:
-----------------------
Unrecognized VM option 'MaxPermSize=512m'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.


* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

    at makeError (F:\test\xx\node_modules\execa\index.js:174:9)
    at F:\test\xx\node_modules\execa\index.js:278:16
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async runOnAllDevices (F:\test\xx\node_modules\@react-native-community\cli-platform-android\build\commands\runAndroid\runOnAllDevices.js:109:5)
    at async Command.handleAction (F:\test\xx\node_modules\@react-native-community\cli\build\index.js:192:9)
info Run CLI with --verbose flag for more details.

我该如何解决这个错误？

Answer 1

此选项在 Java 11 和 Java 17 之间已完全删除。如果您想使用 Java 17 或更高版本，您可以必须删除MaxPermSize=512m - 如果存在该选项，JVM 将明确拒绝启动。

请注意，在 Java 8 中，此选项不再有效，因此即使在 Java 8 中也可以安全删除。(https://docs.oracle.com/javase/9/migrate/)

在某些配置中保留此选项的唯一可能原因是您仍然必须支持 Java 7。但 Java 7 已经过时，恕我直言，如果花在支持 Java 7 上的时间是否值得花时间，这是值得怀疑的。

Answer 2

该选项似乎已停用。 您可以在启动应用程序的命令行中添加标志 -XX:+IgnoreUnrecognizedVMOptions。在这种情况下，JVM 将忽略所有无法识别的标志。