如何编译请参考：How To Build nGrinder from scratch using Maven

问题描述：
在编译过程中提示如下信息：

[WARNING] The POM for grinder:grinder-patch:jar:3.9.1-patch is missing, no dependency information available
[ERROR] Failed to execute goal on project ngrinder-starter: Could not resolve dependencies for project org.ngrinder:ngrinder-starter:jar:3.4.1-SNAPSHOT: Failure to find grinder:grinder-patch:jar:3.9.1-patch in http://repo1.maven.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of maven-repo has elapsed or updates are forced -> [Help 1]

问题分析：
看这个提示就是依赖找不到，发现官网已经使用 3.11 了，就对应升级了版本，问题得到解决
here is my solution by modified pom.xml in root
net.sf.grinder
grinder

3.11

<!--
grinder
grinder-patch
3.9.1-patch

Commons -->

然而又有了新问题：

 [WARNING] The POM for sigar:sigar-native:jar:1.0 is missing, no dependency information available
[ERROR] Failed to execute goal on project ngrinder-core: Could not resolve dependencies for project org.ngrinder:ngrinder-core:jar:3.4.1-SNAPSHOT: Failure to find sigar:sigar-native:jar:1.0 in http://repo1.maven.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of maven-repo has elapsed or updates are forced -> [Help 1]

解决方案：
看来接下来的同样的问题会不断的发生，因此和 ngrinder 作者聊了这个问题，我通过升级版本来解决被否定了，作者 JunHo Yoon 提供了解决方案和不能升级方案的原因！

顺便和 JunHo Yoon 说了下 ngrinder-monitor 的问题：

总结：

1. 这里给大家提供一下解决问题的思路，不要碰到问题就网络搜索，建议认真的分析问题，找到问题的根本原因
2. 开源的好处就在这里，能够和官方的大牛面对面交流，一句话问题就迎刃而解
3. 这里还是感谢@JunHo Yoon 第一时间给我做了回复
4. 没有解决不了的问题