java - JaCoco MVN 未知 block 类型

Question

所以我使用 JaCoco maven 插件自动生成代码覆盖率报告，以便我可以将它们发送到 codecov 以显示在 GitHub 上。突然间，我从 JaCoco 那里得到了一个构建失败，说“未知块类型”。这不是昨天发生的，所以我不知道为什么现在会发生。这是我的 pom.xml 的相关部分

<plugin>
  <groupId>org.jacoco</groupId>
  <artifactId>jacoco-maven-plugin</artifactId>
  <version>0.8.5</version>
  <executions>
    <execution>
      <goals>
        <goal>prepare-agent</goal>
      </goals>
    </execution>
    <execution>
      <id>report</id>
      <phase>test</phase>
      <goals>
        <goal>report</goal>
      </goals>
    </execution>
  </executions>
</plugin>

如何解决此问题以正确生成覆盖率报告？

-X 跟踪

[DEBUG] Configuring mojo org.jacoco:jacoco-maven-plugin:0.8.5:report from plugin realm ClassRealm[plugin>org.jacoco:jacoco-maven-plugin:0.8.5, parent: jdk.internal.loader.ClassLoaders$AppClassLoader@55054057]
[DEBUG] Setting property: classpath.resource.loader.class => 'org.codehaus.plexus.velocity.ContextClassLoaderResourceLoader'.
[DEBUG] Setting property: site.resource.loader.class => 'org.codehaus.plexus.velocity.SiteResourceLoader'.
[DEBUG] Setting property: velocimacro.messages.on => 'false'.
[DEBUG] Setting property: runtime.log.invalid.references => 'false'.
[DEBUG] Setting property: resource.loader => 'classpath,site'.
[DEBUG] Setting property: velocimacro.permissions.allow.inline.to.replace.global => 'true'.
[DEBUG] Setting property: resource.manager.logwhenfound => 'false'.
[DEBUG] *******************************************************************
[DEBUG] Starting Apache Velocity v1.5 (compiled: 2007-02-22 08:52:29)
[DEBUG] RuntimeInstance initializing.
[DEBUG] Default Properties File: org/apache/velocity/runtime/defaults/velocity.properties
[DEBUG] LogSystem has been deprecated. Please use a LogChute implementation.
[DEBUG] Default ResourceManager initializing. (class org.apache.velocity.runtime.resource.ResourceManagerImpl)
[DEBUG] ResourceLoader instantiated: org.codehaus.plexus.velocity.ContextClassLoaderResourceLoader
[DEBUG] ResourceLoader instantiated: org.codehaus.plexus.velocity.SiteResourceLoader
[DEBUG] ResourceCache: initialized (class org.apache.velocity.runtime.resource.ResourceCacheImpl)
[DEBUG] Default ResourceManager initialization complete.
[DEBUG] Loaded System Directive: org.apache.velocity.runtime.directive.Literal
[DEBUG] Loaded System Directive: org.apache.velocity.runtime.directive.Macro
[DEBUG] Loaded System Directive: org.apache.velocity.runtime.directive.Parse
[DEBUG] Loaded System Directive: org.apache.velocity.runtime.directive.Include
[DEBUG] Loaded System Directive: org.apache.velocity.runtime.directive.Foreach
[DEBUG] Created '20' parsers.
[DEBUG] Velocimacro : initialization starting.
[DEBUG] Velocimacro : allowInline = true : VMs can be defined inline in templates
[DEBUG] Velocimacro : allowInlineToOverride = true : VMs defined inline may replace previous VM definitions
[DEBUG] Velocimacro : allowInlineLocal = false : VMs defined inline will be global in scope if allowed.
[DEBUG] Velocimacro : autoload off : VM system will not automatically reload global library macros
[DEBUG] Velocimacro : Velocimacro : initialization complete.
[DEBUG] RuntimeInstance successfully initialized.
[DEBUG] Configuring mojo 'org.jacoco:jacoco-maven-plugin:0.8.5:report' with basic configurator -->
[DEBUG]   (f) dataFile = /mnt/a/Documents/school/college/courses/csci420/UMLEditor/target/jacoco.exec
[DEBUG]   (f) outputDirectory = /mnt/a/Documents/school/college/courses/csci420/UMLEditor/target/site/jacoco
[DEBUG]   (f) outputEncoding = UTF-8
[DEBUG]   (f) project = MavenProject: UMLEditor:UMLEditor:0.0.1-SNAPSHOT @ /mnt/a/Documents/school/college/courses/csci420/UMLEditor/pom.xml
[DEBUG]   (f) skip = false
[DEBUG]   (f) sourceEncoding = UTF-8
[DEBUG]   (f) title = UMLEditor
[DEBUG] -- end configuration --
[INFO] Loading execution data file /mnt/a/Documents/school/college/courses/csci420/UMLEditor/target/jacoco.exec
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  36.600 s
[INFO] Finished at: 2020-04-25T04:24:50-04:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.jacoco:jacoco-maven-plugin:0.8.5:report (report) on project UMLEditor: An error has occurred in JaCoCo report generation.: Error while creating report: Unknown block type 77. -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.jacoco:jacoco-maven-plugin:0.8.5:report (report) on project UMLEditor: An error has occurred in JaCoCo report generation.
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: org.apache.maven.plugin.MojoExecutionException: An error has occurred in JaCoCo report generation.
    at org.jacoco.maven.AbstractReportMojo.execute (AbstractReportMojo.java:168)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: org.apache.maven.reporting.MavenReportException: Error while creating report: Unknown block type 77.
    at org.jacoco.maven.AbstractReportMojo.executeReport (AbstractReportMojo.java:184)
    at org.jacoco.maven.AbstractReportMojo.execute (AbstractReportMojo.java:166)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: java.io.IOException: Unknown block type 77.
    at org.jacoco.core.data.ExecutionDataReader.readBlock (ExecutionDataReader.java:119)
    at org.jacoco.core.data.ExecutionDataReader.read (ExecutionDataReader.java:93)
    at org.jacoco.core.tools.ExecFileLoader.load (ExecFileLoader.java:60)
    at org.jacoco.core.tools.ExecFileLoader.load (ExecFileLoader.java:74)
    at org.jacoco.maven.ReportSupport.loadExecutionData (ReportSupport.java:89)
    at org.jacoco.maven.ReportMojo.loadExecutionData (ReportMojo.java:61)
    at org.jacoco.maven.AbstractReportMojo.executeReport (AbstractReportMojo.java:178)
    at org.jacoco.maven.AbstractReportMojo.execute (AbstractReportMojo.java:166)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Answer 1

Unknown block type

在 org.jacoco:jacoco-maven-plugin:0.8.5:report 执行期间表示损坏 jacoco.exec文件。
该文件由 JaCoCo 代理在 JVM 终止时使用 JVM shutdown hook 进行测试生成。 .
文件损坏通常发生在带有测试的 JVM 被硬杀死而不是正常的成功终止时。

my mvn hangs for quite some time after finishing the last test and doesn't seem to be doing anything

IMO 是否确认带有测试的 JVM 未正常终止，因为这通常表明 maven-surefire-plugin等待测试终止一段时间，然后终止 JVM - 参见类似问题 https://github.com/jacoco/jacoco/issues/1042
总而言之，请修复您的代码/测试 - 带有测试的 JVM 应该正常终止。

I also believe I have located the troublesome test file as when I exclude it everything runs fine and it even stops hanging. I just don't understand what would be wrong in that file that would cause a hang (there are no loops, the only "files" being done are modifying the default System.out/err streams to a separate print writer) given that most of it is string manipulation.

报价 http://maven.apache.org/surefire/maven-surefire-plugin/faq.html为 maven-surefire-plugin版本 3.0.0-M4 :

It would be even worse if you override the Java stream by System.setOut because the stream is also supposed to be corrupted but the Maven will never see the tests finished and build may hang.