创建阴影 jar 时出错：null：IllegalArgumentException

Question

我在我的项目中使用 ASM 6.1 动态生成 Class 文件。但是我在组装fat jar的时候遇到了问题

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-shade-plugin:2.4.3:shade (default-cli) on project uetlx: Error creating shaded jar: null: IllegalArgumentException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-shade-plugin:2.4.3:shade (default-cli) on project uetlx: Error creating shaded jar: null
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.MojoExecutionException: Error creating shaded jar: null
        at org.apache.maven.plugins.shade.mojo.ShadeMojo.execute(ShadeMojo.java:540)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
        ... 20 more
Caused by: java.lang.IllegalArgumentException
        at org.objectweb.asm.ClassReader.<init>(Unknown Source)
        at org.objectweb.asm.ClassReader.<init>(Unknown Source)
        at org.objectweb.asm.ClassReader.<init>(Unknown Source)
        at org.apache.maven.plugins.shade.DefaultShader.addRemappedClass(DefaultShader.java:415)
        at org.apache.maven.plugins.shade.DefaultShader.shadeSingleJar(DefaultShader.java:219)
        at org.apache.maven.plugins.shade.DefaultShader.shadeJars(DefaultShader.java:179)
        at org.apache.maven.plugins.shade.DefaultShader.shade(DefaultShader.java:104)
        at org.apache.maven.plugins.shade.mojo.ShadeMojo.execute(ShadeMojo.java:454)
        ... 22 more

这是什么意思？一些相互冲突的 objectweb.asm 版本？解决方法是什么？

Answer 1

我 运行 遇到与版本 2.4.3 相同的问题。升级到最新版本的插件（当前为 3.2.1）解决了这个问题。

Answer 2

顺便提一下，升级到最新版本的插件也为我解决了这个问题。我的问题是我发现的示例使用了旧版本，我没有考虑升级它，只是获取配置来解决我的问题。现在我会更加认真地寻找最新的升级和新的配置。