从IDE中导出的junit driver脚本问题

testingstudying

用IDE导出的junit4  driver脚本在eclipse 中运行登录不成功，但是在IDE中运行登录成功，请大师帮忙看下
运行错误：org.openqa.selenium.remote.UnreachableBrowserException: Error communicating with the remote browser. It may have died.
Build info: version: '2.41.0', revision: '3192d8a', time: '2014-03-27 17:18:15'
System info: host: 'xxx-PC', ip: '192.168.1.xxx', os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.7.0_51'
Driver info: driver.version: RemoteWebDriver
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:589)
        at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:348)
        at org.openqa.selenium.remote.RemoteWebDriver.findElementByLinkText(RemoteWebDriver.java:397)
        at org.openqa.selenium.By$ByLinkText.findElement(By.java:242)
        at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:340)
        at qianxs.Login.test(Login.java:46)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
        at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
        at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
        at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
        at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
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:339)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:579)
        at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:117)
        at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:178)
        at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144)
        at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:131)
        at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:610)
        at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:445)
        at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72)
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57)
        at org.openqa.selenium.remote.HttpCommandExecutor.fallBackExecute(HttpCommandExecutor.java:340)
        at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:301)
        at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.execute(NewProfileExtensionConnection.java:165)
        at org.openqa.selenium.firefox.FirefoxDriver$LazyCommandExecutor.execute(FirefoxDriver.java:362)
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:568)
        ... 30 more

jingzizx

出现这个问题的原因一直找不到，而且，出现的时机并不固定。最后才发现问题是socket连接达到上限，原因是由于：webdriver在请求服务以后关闭连接，但是tcp的机制是这个连接不能马上关闭，而是把状态置为time_wait.,如果此时你用netstat查看自己的网络连接，会发现大量的tcp连接处于time_wait状态，导致请求连接达到上限，无法继续请求新的连接。
解决办法：
增大tcp最大连接数
修改注册表中HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\MaxUserPort
设置 MaxUserPort = 0xFFFE(65534), 如没有此项则新建,类型为WORD 值。修改以上设置后,需要重启系统生效。
减少time_wait时间：
修改注册表中HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\TCPTimedWaitDelay
设置TCPTimedWaitDelay =30如没有此项则新建,类型为: DWORD 值。修改以上设置后,需要重启系统生效。（人家的经验，楼主试试）

testingstudying

谢谢啊