记arthas-memorycompiler在VSCode报错

开源框架

发布日期: 2021-09-23

文章字数: 709

阅读时长: 3 分

阅读次数:

相信不少Java开发人员都在使用IntelliJ IDEA进行开发，本人也使用很长时间的IntelliJ IDEA。随着Visual Studio Code越来越火，中秋节假日期间想体验下，因此下载并针对VSCode进行了配置，将手头现有的一些项目导入进行了试用。

问题

刚开始环境配置还挺顺利的，很快就安装完了Java相关的环境，并写了个HelloWorld的类进行了测试，一切ok。接下来将手头的个别项目进行导入，并跑了下单元测试。诡异的情况出现了，在导入feature-flag项目之后，执行单元测试失败，但是通过mvn test和IDEA去执行都是正常的，报错信息如下：

Caused by: com.taobao.arthas.compiler.DynamicCompilerException: java.lang.RuntimeException: java.lang.RuntimeException: Wasn't able to open file:/Users/zhengzhq/Library/Application%20Support/Code/User/globalStorage/redhat.java/0.82.0/config_mac/org.eclipse.osgi/81/0/.cp/org as a jar file

 at com.taobao.arthas.compiler.DynamicCompiler.build(DynamicCompiler.java:89)

 at cn.zzq0324.feature.flag.support.JdkCompiler.compile(JdkCompiler.java:38)

 at cn.zzq0324.feature.flag.FeatureFlagInstanceRegister.compileAndLoadClass(FeatureFlagInstanceRegister.java:83)

 at cn.zzq0324.feature.flag.FeatureFlagInstanceRegister.dynamicLoadClassAndRegisterBean(FeatureFlagInstanceRegister.java:63)

 at cn.zzq0324.feature.flag.FeatureFlagInstanceRegister.registerIfNotExist(FeatureFlagInstanceRegister.java:39)

 ... 31 more

Caused by: java.lang.RuntimeException: java.lang.RuntimeException: Wasn't able to open file:/Users/zhengzhq/Library/Application%20Support/Code/User/globalStorage/redhat.java/0.82.0/config_mac/org.eclipse.osgi/81/0/.cp/org as a jar file

 at com.sun.tools.javac.main.Main.compile(Main.java:559)

 at com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:129)

 at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:138)

 at com.taobao.arthas.compiler.DynamicCompiler.build(DynamicCompiler.java:61)

一开始还以为是VSCode的vscode-java-test插件的bug导致的，因此提了issue，官方回复了，觉得这个问题是使用了arthas-memorycompiler导致的，需要联系对方解决，因此打了out-of-scope的标签。想想好像也有道理，因此决定深入排查下问题，解决在VSCode上的解决问题。

排障

通过debug观察，发现arthas-memorycompiler在路径中包含空格、Unicode字符的时候会出现Bug，该Bug会导致找不到文件从而错误的执行到Jar的解析逻辑中，如下：

public List<JavaFileObject> find(String packageName) throws IOException {
    String javaPackageName = packageName.replaceAll("\\.", "/");

    List<JavaFileObject> result = new ArrayList<JavaFileObject>();

    Enumeration<URL> urlEnumeration = classLoader.getResources(javaPackageName);
    while (urlEnumeration.hasMoreElements()) { // one URL for each jar on the classpath that has the given package
        URL packageFolderURL = urlEnumeration.nextElement();
        result.addAll(listUnder(packageName, packageFolderURL));
    }

    return result;
}

private Collection<JavaFileObject> listUnder(String packageName, URL packageFolderURL) {
    // 如果是路径带空格，此处就会找不到文件，调用isDirectory()就会返回false
    File directory = new File(decode(packageFolderURL.getFile()));
    if (directory.isDirectory()) { // browse local .class files - useful for local execution
        return processDir(packageName, directory);
    } else { // browse a jar file
        return processJar(packageFolderURL);
    } // maybe there can be something else for more involved class loaders
}