提示：org.openqa.selenium.WebDriverException: org.apache.http.conn.HttpHostConnectException: Connect to localhost:46579 [localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1] failed: Connection refused: connect
前两天运行还是可以的 今天就怎么都不行了，同样的环境在另一台电脑上可以运行，不知道是哪里出问题了
参考：
1. https://github.com/mozilla/geckodriver/issues/1121
2. https://github.com/SeleniumHQ/selenium/issues/4203
https://github.com/mozilla/geckodriver/issues/1121
楼上二位辛苦了，但是并没有正解的内容
我的环境是：
jdk1.81
selenium 3.71
geckodriver 0.19.1
maven 3.53
eclipse conselo只打印出：
1525937526649 geckodriver INFO geckodriver 0.19.1
1525937526657 geckodriver INFO Listening on 127.0.0.1:3610
下面直接跟着报错信息：
org.openqa.selenium.WebDriverException: org.apache.http.conn.HttpHostConnectException: Connect to localhost:3610 [localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1] failed: Connection refused: connect
Build info: version: '3.7.1', revision: '8a0099a', time: '2017-11-06T21:01:39.354Z'
System info: host: 'LAPTOP-N2JLK8CC', ip: '192.168.1.10', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_92'
Driver info: driver.version: FirefoxDriver
at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:92)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:600)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:219)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:142)
at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:120)
at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:98)
at Test.some.A1login(some.java:23)
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 org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767)
at org.testng.TestRunner.run(TestRunner.java:617)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
at org.testng.TestNG.run(TestNG.java:1057)
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
Caused by: org.apache.http.conn.HttpHostConnectException: Connect to localhost:3610 [localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1] failed: Connection refused: connect
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:159)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:359)
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:381)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:237)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
at org.openqa.selenium.remote.internal.ApacheHttpClient.fallBackExecute(ApacheHttpClient.java:138)
at org.openqa.selenium.remote.internal.ApacheHttpClient.execute(ApacheHttpClient.java:86)
at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:101)
at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:73)
at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:142)
at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
... 30 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:75)
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)
... 45 more
这个问题出现状况是，在当前的jdk以及selenium版本下，chrome等浏览器都能够正常启动，顺便一说，chromedriver的版本为2.29。
然后赶紧很奇怪，查询了一下geckodriver的0.15.0版本的下载文档发现这样一句话：
IMPORTANT: If you use geckodriver with Selenium, you must upgrade to Selenium 3.3 since this release aligns HTTP responses with the WebDriver standard.
后来将geckodriver版本升级为0.15.0发现问题解决。
这里说一句，selenium自从3出来以后，都是不向下兼容的。如果出现问题，首先要检查的就是版本。
而且，貌似Firefox>=52.0版本的需要用最新的Selenium和最新的Webdriver（3.3.0+）。