这是我的错误日志：

Apr 12, 2014 3:27:46 AM org.apache.http.impl.client.DefaultRequestDirector tryConnect
INFO: I/O exception (java.net.SocketException) caught when connecting to the target host: Permission denied: connect
Apr 12, 2014 3:27:46 AM org.apache.http.impl.client.DefaultRequestDirector tryConnect
INFO: Retrying connect
Apr 12, 2014 3:27:46 AM org.apache.http.impl.client.DefaultRequestDirector tryConnect
INFO: I/O exception (java.net.SocketException) caught when connecting to the target host: Permission denied: connect
Apr 12, 2014 3:27:46 AM org.apache.http.impl.client.DefaultRequestDirector tryConnect
INFO: Retrying connect
Apr 12, 2014 3:27:46 AM org.apache.http.impl.client.DefaultRequestDirector tryConnect
INFO: I/O exception (java.net.SocketException) caught when connecting to the target host: Permission denied: connect
Apr 12, 2014 3:27:46 AM org.apache.http.impl.client.DefaultRequestDirector tryConnect
INFO: Retrying connect
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: 'prgi-PC', ip: '192.168.1.9', os.name: 'Windows 7', os.arch: 'amd64', 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.RemoteWebElement.execute(RemoteWebElement.java:268)
    at org.openqa.selenium.remote.RemoteWebElement.findElements(RemoteWebElement.java:187)
    at org.openqa.selenium.remote.RemoteWebElement.findElementsByTagName(RemoteWebElement.java:264)
    at org.openqa.selenium.By$ByTagName.findElements(By.java:323)
    at org.openqa.selenium.remote.RemoteWebElement.findElements(RemoteWebElement.java:163)
    at com.sai.kiran.Test.main(Test.java:155)
Caused by: java.net.SocketException: Permission denied: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:83)
    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:322)
    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)
    ... 6 more

码：

FirefoxProfile profile = new FirefoxProfile();

String path="C:\\Users\\prgi\\Downloads\\listShack";
profile.setPreference("browser.download.folderList", 2);
profile.setPreference("browser.download.dir", path);

profile.setPreference("browser.download.manager.alertOnEXEOpen", false);

profile.setPreference("browser.helperApps.neverAsk.saveToDisk","application/msword,application/csv,text/csv,image/png ,image/jpeg");

profile.setPreference("browser.download.manager.showWhenStarting",
false);

profile.setPreference("browser.download.manager.focusWhenStarting",
false);
//profile.setPreference("browser.download.useDownloadDir",true);
profile.setPreference("browser.helperApps.alwaysAsk.force",
false);

profile.setPreference("browser.download.manager.alertOnEXEOpen", false);

profile.setPreference("browser.download.manager.closeWhenDone", false);

profile.setPreference("browser.download.manager.showAlertOnComplete", false);
profile.setPreference("browser.download.manager.useWindow",
false);

profile.setPreference("browser.download.manager.showWhenStarting",false);

profile.setPreference("services.sync.prefs.sync.browser.download.manager.showWhenStarting",
false);

profile.setPreference("pdfjs.disabled", true);

WebDriver driver = new FirefoxDriver(profile);

从这里我正在管理我的元素。

注意：它连续24/7天工作了两天，今天我经常收到此错误。