Selenium WebDriver中driver.wait(0)触发IllegalMonitorStateException问题

架构老林

2026-7-18

解决Selenium中driver.wait(0)触发的IllegalMonitorStateException异常

在使用Selenium WebDriver执行测试时，代码中的driver.wait(0)语句触发了java.lang.IllegalMonitorStateException异常，原本期望通过该语句等待弹窗加载，确保后续操作正常执行。

堆栈跟踪信息

java.lang.IllegalMonitorStateException
    at java.lang.Object.wait(Native Method)
    at Test.MounaTest.test(MounaTest.java:61)
    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.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)
    at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
    at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
    at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)
    at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)
    at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$7(TestMethodTestDescriptor.java:214)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:210)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:66)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
    at java.util.ArrayList.forEach(ArrayList.java:1259)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
    at java.util.ArrayList.forEach(ArrayList.java:1259)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)
    at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107)
    at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
    at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
    at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
    at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:95)
    at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:91)
    at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:60)
    at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:98)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:40)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:529)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:756)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:452)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)

原测试代码

package Test;

// Generated by Selenium IDE
import org.junit.Before;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.After;
import static org.junit.Assert.*;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.core.IsNot.not;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.Dimension;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.interactions.Actions;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.Alert;
import org.openqa.selenium.Keys;
import java.util.*;
import java.net.MalformedURLException;
import java.net.URL;
public class MounaTest {
  private static WebDriver driver;
  private Map<String, Object> vars;
  JavascriptExecutor js;
  @BeforeEach
  public void setUp() {
    driver = new ChromeDriver();
    js = (JavascriptExecutor) driver;
    vars = new HashMap<String, Object>();
  }
  @AfterAll
  public static void tearDown() {
    driver.quit();
  }
  public String waitForWindow(int timeout) {
        try {
          Thread.sleep(timeout);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
        Set<String> whNow = driver.getWindowHandles();
        Set<String> whThen = (Set<String>) vars.get("window_handles");
        if (whNow.size() > whThen.size()) {
          whNow.removeAll(whThen);
        }
        return whNow.iterator().next();
      }
  @Test
  public void test() throws InterruptedException {
        driver.get("https://tinder.com/");
        System.out.println("MOUNA CAMELIA");
        driver.manage().window().setSize(new Dimension(1552, 840));
        driver.wait(0); 
        driver.findElement(By.cssSelector(".Miw\\(120px\\) .l17p5q9z")).click();
        driver.switchTo().frame(0);
        vars.put("window_handles", driver.getWindowHandles());
        driver.findElement(By.cssSelector(".ssJRIf")).click();
        vars.put("win8338", waitForWindow(2000));
        vars.put("root", driver.getWindowHandle());
        driver.switchTo().window(vars.get("win8338").toString());
        driver.findElement(By.cssSelector(".fFW7wc-ibnC6b-r4m2rf:nth-child(4) > .fFW7wc-ibnC6b-ssJRIf")).click();
        driver.close();
        driver.switchTo().window(vars.get("root").toString());
        {
          WebElement element = driver.findElement(By.linkText("Terms"));
          Actions builder = new Actions(driver);
          builder.moveToElement(element).perform();
        }
        driver.findElement(By.cssSelector(".Mx\\(a\\):nth-child(4) path")).click();
        driver.findElement(By.cssSelector(".Sq\\(28px\\) > path")).click();}
}

异常原因分析

driver.wait()是Java Object类的原生方法，调用前必须通过synchronized块获取driver对象的监视器锁，否则会直接抛出IllegalMonitorStateException。
这种方式完全不符合Selenium的等待规范，Object.wait()无法感知页面元素或弹窗的加载状态，根本达不到等待的目的。

解决方案

使用Selenium官方推荐的显式等待（WebDriverWait结合ExpectedConditions），它会主动轮询页面，直到目标元素满足指定条件（比如可点击、可见），相比硬等待更高效稳定。

修改后的代码

将原代码中的driver.wait(0)替换为以下显式等待逻辑：

@Test
public void test() throws InterruptedException {
      driver.get("https://tinder.com/");
      System.out.println("MOUNA CAMELIA");
      driver.manage().window().setSize(new Dimension(1552, 840));
      // 替换driver.wait(0)为显式等待，等待目标按钮可点击，超时时间设为10秒
      WebDriverWait wait = new WebDriverWait(driver, 10);
      wait.until(ExpectedConditions.elementToBeClickable(By.cssSelector(".Miw\\(120px\\) .l17p5q9z")));
      
      driver.findElement(By.cssSelector(".Miw\\(120px\\) .l17p5q9z")).click();
      driver.switchTo().frame(0);
      vars.put("window_handles", driver.getWindowHandles());
      driver.findElement(By.cssSelector(".ssJRIf")).click();
      vars.put("win8338", waitForWindow(2000));
      vars.put("root", driver.getWindowHandle());
      driver.switchTo().window(vars.get("win8338").toString());
      driver.findElement(By.cssSelector(".fFW7wc-ibnC6b-r4m2rf:nth-child(4) > .fFW7wc-ibnC6b-ssJRIf")).click();
      driver.close();
      driver.switchTo().window(vars.get("root").toString());
      {
        WebElement element = driver.findElement(By.linkText("Terms"));
        Actions builder = new Actions(driver);
        builder.moveToElement(element).perform();
      }
      driver.findElement(By.cssSelector(".Mx\\(a\\):nth-child(4) path")).click();
      driver.findElement(By.cssSelector(".Sq\\(28px\\) > path")).click();
}

额外优化建议

原代码中的waitForWindow方法使用Thread.sleep()属于硬等待，也可以替换为基于窗口句柄变化的显式等待，进一步提升测试稳定性。
尽量避免直接使用索引切换frame（driver.switchTo().frame(0)），建议通过元素定位切换，避免页面结构变化导致测试失败。

内容的提问来源于stack exchange，提问作者منى

Selenium WebDriver中driver.wait(0)触发IllegalMonitorStateException问题

堆栈跟踪信息 #

原测试代码 #

异常原因分析 #

解决方案 #

修改后的代码 #