Appium Flutter Driver连接SoStronk应用失败：重试30次后终止

我正在使用Appium Flutter Driver对Flutter开发的SoStronk移动端应用（可从SoStronk.com下载）做自动化测试，驱动均正常工作，但启动应用后出现如下错误：

UnknownError: An unknown server-side error occurred while processing the command. Original error: Failed to connect 30 times. Aborting.

测试代码 #

import Util.TestBase;
import appium_flutter_driver.FlutterFinder;
import appium_flutter_driver.finder.FlutterElement;
import com.relevantcodes.extentreports.LogStatus;
import io.appium.java_client.TouchAction;
import org.openqa.selenium.TimeoutException;
import org.testng.annotations.Test;

import static io.appium.java_client.touch.offset.PointOption.point;

public class SoStronkDemo extends TestBase{

    @Test
    public void test1 (){

        try {
            switchContext("FLUTTER");
            logger = extent.startTest("FLUTTER Switch Context");
            logger.log(LogStatus.PASS, "FLUTTER Switch Context passed");
           // switchContext("NATIVE_APP");
            FlutterFinder find = new FlutterFinder(driver);

            driver.closeApp();
}

错误日志详情 #

Driver info: driver.version: AndroidDriver
remote stacktrace: UnknownError: An unknown server-side error occurred while processing the command. Original error: Failed to connect 30 times. Aborting.
at getResponseForW3CError (/Applications/Appium Server GUI.app/Contents/Resources/app/node_modules/appium/node_modules/appium-base-driver/lib/protocol/errors.js:804:9)
at asyncHandler (/Applications/Appium Server GUI.app/Contents/Resources/app/node_modules/appium/node_modules/appium-base-driver/lib/protocol/protocol.js:380:37)
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
System info: host: 'Ashishs-MacBook-Pro.local', ip: '2405:201:c009:bdd4:49d7:55e6:7524:31c3%en0', os.name: 'Mac OS X', os.arch: 'aarch64', os.version: '13.0', java.version: '20'
Driver info: driver.version: AndroidDriver

at io.appium.java_client.remote.AppiumCommandExecutor$1.createSession(AppiumCommandExecutor.java:208)
at io.appium.java_client.remote.AppiumCommandExecutor.createSession(AppiumCommandExecutor.java:217)
at io.appium.java_client.remote.AppiumCommandExecutor.execute(AppiumCommandExecutor.java:239)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:42)
at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
at io.appium.java_client.android.AndroidDriver.execute(AndroidDriver.java:1)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:213)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:131)
at io.appium.java_client.DefaultGenericMobileDriver.<init>(DefaultGenericMobileDriver.java:38)
at io.appium.java_client.AppiumDriver.<init>(AppiumDriver.java:84)
at io.appium.java_client.AppiumDriver.<init>(AppiumDriver.java:94)
at io.appium.java_client.android.AndroidDriver.<init>(AndroidDriver.java:95)
at Util.TestBase.setup(TestBase.java:49)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:59)
at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:458)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:222)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:142)
at org.testng.internal.TestMethodWorker.invokeBeforeClassMethods(TestMethodWorker.java:168)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:105)
at org.testng.TestRunner.privateRun(TestRunner.java:648)
at org.testng.TestRunner.run(TestRunner.java:505)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:455)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415)
at org.testng.SuiteRunner.run(SuiteRunner.java:364)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)
at org.testng.TestNG.runSuites(TestNG.java:1049)
at org.testng.TestNG.run(TestNG.java:1017)
at com.intellij.rt.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:66)
at com.intellij.rt.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:105)

Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at io.appium.java_client.remote.AppiumCommandExecutor$1.createSession(AppiumCommandExecutor.java:186)
... 36 more
Caused by: org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: Failed to connect 30 times. Aborting.
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
System info: host: 'Ashishs-MacBook-Pro.local', ip: '2405:201:c009:bdd4:49d7:55e6:7524:31c3%en0', os.name: 'Mac OS X', os.arch: 'aarch64', os.version: '13.0', java.version: '20'
Driver info: driver.version: AndroidDriver
remote stacktrace: UnknownError: An unknown server-side error occurred while processing the command. Original error: Failed to connect 30 times. Aborting.
at getResponseForW3CError (/Applications/Appium Server GUI.app/Contents/Resources/app/node_modules/appium/node_modules/appium-base-driver/lib/protocol/errors.js:804:9)
at asyncHandler (/Applications/Appium Server GUI.app/Contents/Resources/app/node_modules/appium/node_modules/appium-base-driver/lib/protocol/protocol.js:380:37)
at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:67)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:484)
at org.openqa.selenium.remote.W3CHandshakeResponse.lambda$errorHandler$0(W3CHandshakeResponse.java:62)
at org.openqa.selenium.remote.HandshakeResponse.lambda$getResponseFunction$0(HandshakeResponse.java:30)
at org.openqa.selenium.remote.ProtocolHandshake.lambda$createSession$0(ProtocolHandshake.java:126)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
at java.base/java.util.Spliterators$ArraySpliterator.tryAdvance(Spliterators.java:1016)
at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:129)
at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:527)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:513)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
at java.base/java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:150)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:647)
at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:128)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
... 38 more

排查解决方法 #

• 确认应用为debug/profile版本：Appium Flutter Driver需要连接Flutter VM服务，仅debug或profile包开放该端口，release包无法连接，直接更换包体测试。
• 手动转发端口：执行adb forward tcp:41000 tcp:41000，确保主机能访问设备上的Flutter服务端口，同时检查主机防火墙是否拦截41000端口。
• 延长连接超时：在Desired Capabilities中添加flutterConnectTimeout参数，设置为60000（60秒），给应用足够的启动时间：

  capabilities.setCapability("flutterConnectTimeout", 60000);
  

• 检查版本兼容性：确保Appium Flutter Driver版本与Flutter SDK版本匹配，同时升级Appium Server到最新稳定版，避免版本兼容问题。
• 重启服务与设备：重启Appium Server、模拟器/真机，清除应用缓存后重新执行测试。

内容的提问来源于stack exchange，提问作者Kunal