使用Bazel运行Quarkus CLI应用时遭遇java.lang.RuntimeException求助

我们在单体仓库（monorepo）中用Bazel配置了MAVEN_REPOS，基于Quarkus 2.9.2.Final开发CLI应用，但执行bazel run //:MyApp时触发运行时异常。相关代码及报错信息如下：

BUILD.bazel #

load("@rules_java//java:defs.bzl", "java_binary", "java_library")
load("//build/bazel/rule_app_launcher:task_master.bzl", "tm_task")

java_binary(
    name = "MyApp",
    srcs = ["Main.java"],
    main_class = "<package to the Main class>.Main",
    resources = ["<references to the application properties>"],
    visibility = ["//visibility:public"],
    deps = [
        "@maven//:io_quarkus_quarkus_arc",
        "@maven//:io_quarkus_quarkus_core",
    ],
)

Main.java #

import io.quarkus.runtime.Quarkus;
import io.quarkus.runtime.QuarkusApplication;
import io.quarkus.runtime.annotations.QuarkusMain;

@QuarkusMain
public class Main {

    public static void main(String... args) {
        Quarkus.run(HelloWorldMain.class, args);
    }


    public class HelloWorldMain implements QuarkusApplication {
        @Override
        public int run(String... args) throws Exception {
            System.out.println("Hello " + args[0]);
            return 0;
        }
    }

}

执行报错信息 #

Exception in thread "main" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at io.quarkus.launcher.QuarkusLauncher.launch(QuarkusLauncher.java:58)
        at io.quarkus.runtime.Quarkus.launchFromIDE(Quarkus.java:97)
        at io.quarkus.runtime.Quarkus.run(Quarkus.java:84)
        at io.quarkus.runtime.Quarkus.run(Quarkus.java:41)
        at <package to the Main class>.Main.main(Main.java:12)
Caused by: java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at io.quarkus.launcher.QuarkusLauncher.launch(QuarkusLauncher.java:56)
        ... 4 more
Caused by: java.lang.IllegalStateException: Failed to locate project dir for /home/User123/.cache/bazel/_bazel_User123/b0cc32ca6725cc3e1476fd4087bd3d1d/execroot/app/bazel-out/k8-fastbuild/bin/<component path>/MyApp.jar
        at io.quarkus.bootstrap.IDELauncherImpl.launch(IDELauncherImpl.java:38)
        ... 9 more

解决线索 #

• Quarkus默认的IDE启动模式需要识别项目根目录，但Bazel运行时会将Jar包生成在缓存目录中，导致Quarkus无法定位项目目录。可在java_binary中添加JVM参数指定项目根：

  java_binary(
      # 其他配置不变
      jvm_flags = ["-Dquarkus.project.dir=$(pwd)"]
  )
  

• 替换Quarkus启动方式：Quarkus.run()默认触发IDE模式启动，改用Quarkus.runInProcess()直接在当前进程运行，跳过依赖项目目录的IDE启动逻辑：

  public static void main(String... args) {
      Quarkus.runInProcess(HelloWorldMain.class, args);
  }
  

• 检查资源文件打包：确保resources字段正确引用了application.properties等配置文件，Bazel需要将这些文件正确打包进Jar，避免Quarkus因读取不到配置触发连锁异常。
• 验证依赖完整性：确认MAVEN_REPOS中已引入quarkus-bootstrap-core等Quarkus启动必需的依赖，避免因缺失组件导致启动失败。

内容的提问来源于stack exchange，提问作者Debopam Mitra