[英]NullPointerException when building Liferay projects with Maven
我正在使用Maven而不是Ant创建Liferay插件。
问题是,在某些开发环境中,当我尝试运行mvn clean package时遇到以下异常:
[DEBUG] Trace
org.apache.maven.lifecycle.LifecycleExecutionException
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException
at com.liferay.maven.plugins.AbstractLiferayMojo.execute(AbstractLiferayMojo.java:88)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
... 17 more
Caused by: java.lang.NullPointerException
at com.liferay.maven.plugins.AbstractLiferayMojo.getProjectClassPath(AbstractLiferayMojo.java:268)
at com.liferay.maven.plugins.AbstractLiferayMojo.getProjectClassLoader(AbstractLiferayMojo.java:255)
at com.liferay.maven.plugins.SassToCssBuilderMojo.doExecute(SassToCssBuilderMojo.java:90)
at com.liferay.maven.plugins.AbstractLiferayMojo.execute(AbstractLiferayMojo.java:81)
... 19 more
我已经有了这个问题的答案,我只是添加这个问题以分享知识。 我在任何地方都找不到此错误。
该错误与插件本身无关,而与Maven的版本有关。 当您尝试使用旧版本的Maven构建Liferay项目时,将引发该错误。
当我们将Maven更新到v3.0.5时,出现错误并且项目正在正确构建。
您是否尝试过跑步:
清洁包装liferay:部署
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