eclipse启动Tomcat时警告：WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property

Eclipse：Eclipse Java EE IDE for Web Developers.

                Version: Mars.2 Release (4.5.2)
                Build id: 20160218-0600

Tomcat：apache-tomcat-7.0.42

六月 26, 2016 2:38:36 下午 org.apache.catalina.core.AprLifecycleListener init

INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jdk1.7.0_09\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Program Files (x86)\AMD APP\bin\x86_64;C:\Program Files (x86)\AMD APP\bin\x86;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files\Java\jdk1.7.0_09\bin;C:\Program Files\Java\jdk1.7.0_09\jre\bin;C:\Soft\apache-maven-3.3.9\bin;C:\Soft\Git\cmd;C:\Soft\TortoiseGit\bin;.
六月 26, 2016 2:38:37 下午 org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.j2ee.server:mvnproject' did not find a matching property.
六月 26, 2016 2:38:38 下午 org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
六月 26, 2016 2:38:38 下午 org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
六月 26, 2016 2:38:38 下午 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 2647 ms
六月 26, 2016 2:38:38 下午 org.apache.catalina.core.StandardService startInternal

INFO: Starting service Catalina

原因：eclipse的tomcat的Servers->Tomcat v7.0 Server at localhost-config->server.xml:Context不支持source属性，这个属性为Eclipse内部用，Tomcat不识别。

知识：1. eclipse的Servers下的相关配置文件会替换tomcat安装目录：apache-tomcat-7.0.42\conf下的相关文件，同时备份原有配置文件：apache-tomcat-7.0.42\backup

             2.   Publish module contexts to separate XML file 是否选中，区别在于：

                    选中：在tomcat的安装目录下：apache-tomcat-7.0.42\conf\Catalina\localhost，生成这个独立的部署配置文件mvnproject.xml

                   没有选择：在tomcat的apache-tomcat-7.0.42\conf\server.xml中加入部署配置：

                  <Context docBase="mvnproject" path="/mvnproject" reloadable="true" source="org.eclipse.jst.j2ee.server:mvnproject"/></Host>