Java maven编译器插件：3.1:编译失败。空指针异常

我在maven编译器插件3.1中得到了NullPointerException。我在SOF上调查过类似的问题，但都是徒劳的尝试

我运行的命令：

mvn compile

maven环境：

Apache Maven 3.0.3 (rNON-CANONICAL_2011-12-28_13-22_mein; 2011-12-28 13:22:36-0600)
Maven home: /soft/maven/3.0.3
Java version: 1.6.0_38, vendor: Sun Microsystems Inc.
Java home: /soft/jdk1.6.0_38-arch/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.13.0-83-generic", arch: "amd64", family: "unix"

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project wikibrain-utils: Execution default-compile of goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile failed. NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project wikibrain-utils: Execution default-compile of goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile failed.
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
    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:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-compile of goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile failed.
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    ... 19 more
Caused by: java.lang.NullPointerException
    at org.apache.maven.plugin.compiler.AbstractCompilerMojo.hasNewFile(AbstractCompilerMojo.java:1198)
    at org.apache.maven.plugin.compiler.AbstractCompilerMojo.isDependencyChanged(AbstractCompilerMojo.java:1166)
    at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:648)
    at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:129)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
    ... 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/PluginExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :wikibrain-utils

（它使用1.6，因为这是项目（遗留项目）所要求的）

错误消息：

Apache Maven 3.0.3 (rNON-CANONICAL_2011-12-28_13-22_mein; 2011-12-28 13:22:36-0600)
Maven home: /soft/maven/3.0.3
Java version: 1.6.0_38, vendor: Sun Microsystems Inc.
Java home: /soft/jdk1.6.0_38-arch/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.13.0-83-generic", arch: "amd64", family: "unix"

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project wikibrain-utils: Execution default-compile of goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile failed. NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project wikibrain-utils: Execution default-compile of goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile failed.
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
    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:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-compile of goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile failed.
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    ... 19 more
Caused by: java.lang.NullPointerException
    at org.apache.maven.plugin.compiler.AbstractCompilerMojo.hasNewFile(AbstractCompilerMojo.java:1198)
    at org.apache.maven.plugin.compiler.AbstractCompilerMojo.isDependencyChanged(AbstractCompilerMojo.java:1166)
    at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:648)
    at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:129)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
    ... 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/PluginExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :wikibrain-utils

[ERROR]未能在wikibrain项目上执行goal org.apache.maven.plugins:maven编译器插件：3.1:compile（默认编译）：执行goal org.apache.maven的默认编译。plugins:maven编译器插件：3.1:compile失败。NullPointerException->[帮助1]
org.apache.maven.lifecycle.LifecycleExecutionException:未能执行目标org.apache.maven.plugins:maven编译器插件：3.1:wikibrain项目上的编译（默认编译）：执行目标org.apache.maven的默认编译。plugins:maven编译器插件：3.1:compile失败。
位于org.apache.maven.lifecycle.internal.MojoExecutor.execute（MojoExecutor.java:225）
位于org.apache.maven.lifecycle.internal.MojoExecutor.execute（MojoExecutor.java:153）
位于org.apache.maven.lifecycle.internal.MojoExecutor.execute（MojoExecutor.java:145）
位于org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject（LifecycleModuleBuilder.java:84）
位于org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject（LifecycleModuleBuilder.java:59）
位于org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild（LifecycleStarter.java:183）
位于org.apache.maven.lifecycle.internal.LifecycleStarter.execute（LifecycleStarter.java:161）
在org.apache.maven.DefaultMaven.doExecute（DefaultMaven.java:319）
在org.apache.maven.DefaultMaven.execute（DefaultMaven.java:156）上
位于org.apache.maven.cli.MavenCli.execute（MavenCli.java:537）
位于org.apache.maven.cli.MavenCli.doMain（MavenCli.java:196）
位于org.apache.maven.cli.MavenCli.main（MavenCli.java:141）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）中
位于java.lang.reflect.Method.invoke（Method.java:597）
位于org.codehaus.plexus.classworlds.launcher.launcher.launchEnhanced（launcher.java:290）
位于org.codehaus.plexus.classworlds.launcher.launcher.launch（launcher.java:230）
位于org.codehaus.plexus.classworlds.launcher.launcher.mainWithExitCode（launcher.java:409）
位于org.codehaus.plexus.classworlds.launcher.launcher.main（launcher.java:352）
原因：org.apache.maven.plugin.PluginExecutionException:目标org.apache.maven.plugins的执行默认编译：maven编译器插件：3.1:编译失败。
位于org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo（DefaultBuildPluginManager.java:110）
位于org.apache.maven.lifecycle.internal.MojoExecutor.execute（MojoExecutor.java:209）
... 还有19个
原因：java.lang.NullPointerException
位于org.apache.maven.plugin.compiler.AbstractCompilerMojo.hasNewFile（AbstractCompilerMojo.java:1198）
位于org.apache.maven.plugin.compiler.AbstractCompilerMojo.isDependencyChanged（AbstractCompilerMojo.java:1166）
位于org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute（AbstractCompilerMojo.java:648）
位于org.apache.maven.plugin.compiler.CompilerMojo.execute（CompilerMojo.java:129）
位于org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo（DefaultBuildPluginManager.java:101）
... 20多
[错误]
[错误]
[错误]有关错误和可能的解决方案的更多信息，请阅读以下文章：
[错误][帮助1]http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
[错误]
[错误]纠正问题后，可以使用命令恢复生成
[错误]mvn-rf:wikibrain utils

我已经解决了这个问题-它碰巧是一个文件权限问题

---

Allen在Windows上编译到SMB共享（在NAS上）时遇到同样的问题

从3.7.0更新到3.8.0修复了它。

        <artifactId>maven-compiler-plugin</artifactId>
        <groupId>org.apache.maven.plugins</groupId>
        <version>3.8.0</version>

maven编译器插件
org.apache.maven.plugins
3.8.0

这是我得到的堆栈轨迹的一部分，以防它帮助其他人发现相同的问题

原因：java.lang.NullPointerException

---

在org.apache.maven.plugin.compiler.AbstractCompilerMojo.hasNewFile（AbstractCompilerMojo.java:1574）

3.1已经很旧了。使用最新的3.5.1，并尝试发布问题的详细信息。不要使用Maven 3.0.3，它确实有问题。使用更为更新的版本，如3.3.9…哪个文件需要权限/