jenkins+maven+git持续集成部署问题总结

1、这个问题出现在单独构建一个项目的子模块时，很奇怪，构建父项目没有问题。

Executing Maven:  -N -B -f /root/.jenkins/workspace/newMer/pom.xml clean install -Dmaven.test.skip=true tomcat:run
java.lang.NullPointerException
	at jenkins.maven3.agent.Maven33Main.launch(Maven33Main.java:176)
	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 hudson.maven.Maven3Builder.call(Maven3Builder.java:139)
	at hudson.maven.Maven3Builder.call(Maven3Builder.java:70)
	at hudson.remoting.UserRequest.perform(UserRequest.java:212)
	at hudson.remoting.UserRequest.perform(UserRequest.java:54)
	at hudson.remoting.Request$2.run(Request.java:369)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Started by user jenkins
Finished: ABORTED

通过排查暂时可以这样解决：jenkins的全局工具中maven的版本不是使用3.5，需要修改成3.3.9就可以了。