那些遇到过的问题

JaCoco MVN 未知块类型

Rya*_*yan 4 java maven jacoco jacoco-maven-plugin

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>
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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
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pot*_*ame 8

我收到了一条非常相似的消息，执行时mvn install产生了 JaCoCo 错误（区别在于Unknown block type 45错误而不是Unknown block type 77原始问题中的错误）：

[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 45. -> [Help 1]
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mvn clean我只需执行并重新启动构建即可消除此错误。

God*_*din 5

未知块类型

在执行期间org.jacoco:jacoco-maven-plugin:0.8.5:report表示jacoco.exec文件损坏。

该文件由 JaCoCo 代理在 JVM 终止时生成，并使用JVM 关闭挂钩进行测试。

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。

完成最后一个测试后，我的 mvn 挂了很长一段时间，似乎什么也没做

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。

我也相信我已经找到了麻烦的测试文件，因为当我排除它时，一切运行良好，甚至停止挂起。我只是不明白该文件有什么问题会导致挂起（没有循环，唯一要做的“文件”是将默认的 System.out/err 流修改为单独的打印编写器），因为大多数其中之一是字符串操作。

引用http://maven.apache.org/surefire/maven-surefire-plugin/faq.html的maven-surefire-plugin版本3.0.0-M4：

如果您通过 System.setOut 覆盖 Java 流，情况会更糟，因为该流也应该已损坏，但 Maven 永远不会看到测试完成并且构建可能会挂起。

  • 啊，没关系，我找到了解决方案。我有一个扫描仪从 System.in 读取数据，尽管我在测试中从未使用过该扫描仪，但我确实在测试结束时关闭了扫描仪。一旦我删除了关闭语句，它就不再挂起，问题就消失了。感谢你的帮助！ (2认同)

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