我想从以下github项目重现分支iswc13：https://github.com/linqs/KnowledgeGraphIdentification/tree/master。 我在本地克隆项目，然后切换到iswc13分支。 我的环境是Ubuntu 16.04，Maven 3.3.9和Openjdk版本“1.8.0_121”。 我需要帮助，因为当我尝试编译项目时遇到以下错误。
Downloading: http://repository.codehaus.org/org/codehaus/groovy/groovy-eclipse-batch/maven-metadata.xml
Downloading: http://nexus.codehaus.org/snapshots/org/codehaus/groovy/groovy-eclipse-batch/maven-metadata.xml
[WARNING] Could not transfer metadata org.codehaus.groovy:groovy-eclipse-batch/maven-metadata.xml from/to codehaus.org (http://repository.codehaus.org): repository.codehaus.org: Name or service not known
[WARNING] Could not transfer metadata org.codehaus.groovy:groovy-eclipse-batch/maven-metadata.xml from/to codehaus-snapshots (http://nexus.codehaus.org/snapshots/): nexus.codehaus.org: Name or service not known
[INFO] Using Groovy-Eclipse compiler to compile both Java and Groovy files
[INFO] Compiling 1 source file to /home/caleb/workspace/KnowledgeGraphIdentification/nell_lazy/target/classes
Annotation processing got disabled, since it requires a 1.6 compliant JVM
----------
1. ERROR in /home/caleb/workspace/KnowledgeGraphIdentification/nell_lazy/src/main/java/edu/umd/cs/psl/kgi/RunKGI.groovy (at line 1)
package edu.umd.cs.psl.kgi;
^
The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files
----------
2. ERROR in /home/caleb/workspace/KnowledgeGraphIdentification/nell_lazy/src/main/java/edu/umd/cs/psl/kgi/RunKGI.groovy (at line 1)
package edu.umd.cs.psl.kgi;
^
The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files
----------
2 problems (2 errors)[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] Found 2 errors and 0 warnings.
[INFO] 1error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.569 s
[INFO] Finished at: 2017-01-30T18:06:48+01:00
[INFO] Final Memory: 14M/315M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.1:compile (default-compile) on project kgi: Compilation failure
[ERROR] Found 2 errors and 0 warnings.
当我运行mvn compile -X时，我有以下内容：
[INFO] Using Groovy-Eclipse compiler to compile both Java and Groovy files
[INFO] Compiling 1 source file to /home/caleb/workspace/KnowledgeGraphIdentification/nell_lazy/target/classes
Annotation processing got disabled, since it requires a 1.6 compliant JVM
----------
1. ERROR in /home/caleb/workspace/KnowledgeGraphIdentification/nell_lazy/src/main/java/edu/umd/cs/psl/kgi/RunKGI.groovy (at line 1)
package edu.umd.cs.psl.kgi;
^
The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files
----------
2. ERROR in /home/caleb/workspace/KnowledgeGraphIdentification/nell_lazy/src/main/java/edu/umd/cs/psl/kgi/RunKGI.groovy (at line 1)
package edu.umd.cs.psl.kgi;
^
The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files
----------
2 problems (2 errors)[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] Found 2 errors and 0 warnings.
[INFO] 1error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.499 s
[INFO] Finished at: 2017-01-30T18:15:54+01:00
[INFO] Final Memory: 13M/307M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.1:compile (default-compile) on project kgi: Compilation failure
[ERROR] Found 2 errors and 0 warnings.
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.1:compile (default-compile) on project kgi: Compilation failure
Found 2 errors and 0 warnings.
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.CompilationFailureException: Compilation failure
Found 2 errors and 0 warnings.
at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:656)
at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:128)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
... 20 more
[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/MojoFailureException
答案 0 :(得分：0)
这是一个Java版本问题。该项目是使用以前版本的Java完成的，并且不能使用我当前的设置，即Openjdk版本＆＃34; 1.8.0_121＆＃34;。我必须使用为Java 1.8制作的pom.xml file。我用这个替换了当前的一个并且它编译成功。