尝试使用MVN测试命令行运行selenium测试时，出现此错误。奇怪的是，我三天前尝试了一下，并成功运行了：

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T E S T S
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Running GoogleNavigationTest
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 45.672 sec <<< FAILURE!

Results :

   Failed tests:   testApp(GoogleNavigationTest): Unable to bind to locking port 70
   54 within 45000 ms

  Tests run: 1, Failures: 1, Errors: 0, Skipped: 0

这是我的测试：

import java.util.List;

 import org.openqa.selenium.By;
 import org.openqa.selenium.WebDriver;
 import org.openqa.selenium.WebElement;
 import org.openqa.selenium.firefox.FirefoxDriver;
 import org.openqa.selenium.firefox.FirefoxProfile;
 import org.testng.annotations.Test;

public class GoogleNavigationTest {
@Test
public void testApp(){
    // The Firefox driver supports javascript 
    FirefoxProfile firefoxProfile = new FirefoxProfile();
    WebDriver driver = new FirefoxDriver();

    // Go to the Google Suggest home page
    driver.get("http://www.google.com/webhp?complete=1&hl=en");

    // Enter the query string "Cheese"
    WebElement query = driver.findElement(By.name("q"));
    query.sendKeys("Cheese");

    // Sleep until the div we want is visible or 5 seconds is over
    long end = System.currentTimeMillis() + 5000;
    while (System.currentTimeMillis() < end) {
        WebElement resultsDiv = driver.findElement(By.className("gssb_e"));

        // If results have been returned, the results are displayed in a drop down.
        if (resultsDiv.isDisplayed()) {
          break;
        }
    }

    // And now list the suggestions
    List<WebElement> allSuggestions =   
    driver.findElements(By.xpath("//td[@class='gssb_a gbqfsf']"));

    for (WebElement suggestion : allSuggestions) {
        System.out.println(suggestion.getText());
    }
     }
   }