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    via Stack Overflow by LittlePanda

    To restart the Selenium Webdriver mock browser in a testcase, first use driver.close() and then reinstantiate the driver.

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    Firewall might be blocking your connection, or MySQL it's not running on your server machine.

Solutions on the web

via GitHub by pradeeppuchalapalli
, 1 year ago
Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure. Build info: version: '2.53.0', revision: '35ae25b1534ae328c771e0856c93e187490ca824', time: '2016-03-15 10:43:46' System info: host
via Stack Overflow by Csanesz
, 7 months ago
Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure. Build info: version: '2.52.0', revision: '4c2593cfc3689a7fcd7be52549167e5ccc93ad28', time: '2016-02-11 11:22:43' System info: host
via Stack Overflow by DINESH KUMAR
, 7 months ago
Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure. Build info: version: '2.53.1', revision: 'a36b8b1cd5757287168e54b817830adce9b0158d', time: '2016-06-30 19:26:09' System info: host
via Stack Overflow by Uday
, 1 month ago
**Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.** Build info: version: '3.6.0', revision: '6fbf3ec767', time: '2017-09-27T15:28:36.4Z' System info: host: 'XXXXXX', ip: 'XXXXXX
org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.Build info: version: '2.53.0', revision: '35ae25b1534ae328c771e0856c93e187490ca824', time: '2016-03-15 10:43:46'System info: host: 'MIN-0915-228', ip: '10.10.10.198', os.name: 'Windows 8.1', os.arch: 'amd64', os.version: '6.3', java.version: '1.7.0_79'Driver info: driver.version: RemoteWebDriver at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:665) at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:249) at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:131) at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:158) at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:148) at com.mize.core.DriverScript.launchBrowser(DriverScript.java:55) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:86) at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:514) at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:215) at org.testng.internal.Invoker.invokeMethod(Invoker.java:589) at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:820) at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1128) at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:129) at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:112) at org.testng.TestRunner.privateRun(TestRunner.java:782) at org.testng.TestRunner.run(TestRunner.java:632) at org.testng.SuiteRunner.runTest(SuiteRunner.java:366) at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:361) at org.testng.SuiteRunner.privateRun(SuiteRunner.java:319) at org.testng.SuiteRunner.run(SuiteRunner.java:268) at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52) at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86) at org.testng.TestNG.runSuitesSequentially(TestNG.java:1244) at org.testng.TestNG.runSuitesLocally(TestNG.java:1169) at org.testng.TestNG.run(TestNG.java:1064) at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:113) at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:206) at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:177)Caused by: org.apache.http.conn.HttpHostConnectException: Connect to localhost:4444 [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:151) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353) at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380) at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236) at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184) at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88) at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:71) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55) at org.openqa.selenium.remote.internal.ApacheHttpClient.fallBackExecute(ApacheHttpClient.java:144) at org.openqa.selenium.remote.internal.ApacheHttpClient.execute(ApacheHttpClient.java:90) at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:142) at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:644) ... 31 moreCaused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) at java.net.AbstractPlainSocketImpl.connect(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:74) at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:134) ... 44 more