Couldn't contact the Remote TestNG client.

1、开发webservice项目，使用eclipse的TestNG自测，发现报错儿：  Couldn't contact the Remote TestNG client. Uncheck the 'Use Project testng.jar' option from your Project properties and try again.如图。

2、控制台输出如下：

Unknown option: -serport

Usage:

[-d output-directory]

default output directory to : test-output

[-testclass list of .class files or list of class names]

[-sourcedir a source directory]

[-annotations javadoc or JDK]

Specifies the default annotation type to be used in suites when none is explicitly

specified. This version of TestNG (15) supports both "javadoc" and "JDK" annotation types.

[-groups comma-separated list of group names to be run]

works only with -testclass

[-excludegroups comma-separated list of group names to be excluded]

works only with -testclass

[-testrunfactory list of .class files or list of class names implementing org.testng.ITestRunnerFactory]

[-listener list of .class files or list of class names implementing org.testng.ITestListener and/or org.testng.ISuiteListener]

[-parallel methods|tests]

run tests in parallel using the specified mode

[-threadcount number of threads to use when running tests in parallel]

[-suitename name]

Default name of test suite, if not specified in suite definition file or source code

[-testname Name]

Default name of test, if not specified in suite definition file or source code

[-reporter Extended configuration for custom report listener]

[suite definition files*]

For details please consult documentation.

3、开始以为是TestNG的插件没有装好，后来排查，因为eclipse安装插件的时候，带了testng.jar包了，然后自己本身的项目中也有testng.jar包

4、既然查明，那么我们把项目里面的配置修改一下，右键点击项目，选择Properties，记得不要选eclipse上方的window菜单下的Properties,不然就把工作空间中所有的设置都改了。

5、点击左方TestNG, 看到Use Project TestNG jar 前方那个对勾了吗？ 恩，去掉就可以了，点击应用，OK。

6、再次testNG 测试用例，OK 可以正常跑通了。