Java.lang.LinkageError RFT -RFT Appium

Question

我被困在这种情况下，我查阅了很多文档，但我找不到解决方案，我正在从事一个自动化web和移动应用程序的项目，有时这两者同时进行，因为必须在它们之间传输信息。

当从IDE (RFT)本身的运行时，自动化正常工作，但是如果我试图从控制台运行它，它会引发以下错误。

exception_name = java.lang.LinkageError
exception_message = loading constraint violation when overriding method "org/openqa/selenium/remote/RemoteWebElement.findElement(Lorg/openqa/selenium/By;)Lorg/openqa/selenium/WebElement;" during creation of class "io/appium/java_client/DefaultGenericMobileElement": loader "com/rational/test/ft/util/FtClassLoader@c6ae7474" of class "io/appium/java_client/DefaultGenericMobileElement" and loader "com/rational/test/ft/util/FtClassLoader@a4fe6ba3" of class "org/openqa/selenium/remote/RemoteWebElement" have different types for the method signature
script_name = Platforms.Test.Test
script_id = Platforms.Test.Test.java
line_number = 40
exception_stack = at java.lang.ClassLoader.defineClassImpl(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:379)
at com.rational.test.ft.util.FtClassLoader.loadClass(FtClassLoader.java:159)
at java.lang.ClassLoader.loadClass(ClassLoader.java:854)
at java.lang.ClassLoader.defineClassImpl(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:379)
at com.rational.test.ft.util.FtClassLoader.loadClass(FtClassLoader.java:159)
at java.lang.ClassLoader.loadClass(ClassLoader.java:854)
at com.rational.test.ft.util.FtClassLoader.callRelatedClassLoaders(FtClassLoader.java:356)
at com.rational.test.ft.util.FtClassLoader.loadClass(FtClassLoader.java:163)
at java.lang.ClassLoader.loadClass(ClassLoader.java:854)
at Platforms.Test.Test.testMain(Test.java:40)
at org.eclipse.equinox.internal.app.EclipseAppContainer.callMethodWithException(EclipseAppContainer.java:587)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:198)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
at org.eclipse.equinox.launcher.Main.run(Main.java:1519)
at org.eclipse.equinox.launcher.Main.main(Main.java:1492)
at org.eclipse.core.launcher.Main.main(Main.java:34)

这就是我如何从命令行运行自动化的方法，kernel.jar是一组封装了Ant的库，其中包含java 7.3.0 (io.appium.java_client)，selenium.jar是selenium-server-独立-3.141.59 (org.openqa )。硒)：

"C:\Program Files\IBM\SDP\jdk\bin\java" -classpath "C:\Program Files\IBM\SDP\FunctionalTester\bin\rational_ft.jar" com.rational.test.ft.rational_ft -datastore "C:\Workspaces\RFT\Project" -projectpath "C:\Workspaces\RFT\Project\libs\inuse\kernel.jar;C:\Workspaces\RFT\Project\libs\inuse\selenium.jar" -log "Project.Test.Test" -playback "Platforms.Test.Test" -args "Test"

自动化脚本非常简单，它导入一个包含功能的类，这些类使用selenium连接到web门户，检索安全代码，然后使用appium在应用程序中使用该代码进行身份验证，并执行其他操作，如果从IDE本身运行，所有操作都是正确的。

public class Test extends TestHelper
{
    /**
     * 
     * @since  2020/08/21
     * @author jddeltoro
     */
    public void testMain(Object[] args) 
    {
        Framework fw =  Framework.getInstance();
        try {
            fw.initEnviromentTokens();
            
            WebAppAutomation waa= new WebAppAutomation(fw);
            waa.init();
            String code = wpa.reatriveSecurityCode();
            waa.quit();

            MobileAppAutomation maa= new MobileAppAutomation(fw);
            maa.init();
            maa.executeProcess(code);
            maa.quit();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

另一个重要的线索是，如果我从命令行运行一个只实例化Selenium或Appium的脚本，则不会显示java.lang.LinkageError，这表明命令是正确的。通过控制台执行的原因是，我远程执行执行，有数千个脚本，当一个脚本完成时，我开始执行另一个脚本。

注意:如果我使用已安装的java，异常类似：

"java -classpath "C:\Program Files\IBM\SDP\FunctionalTester\bin\rational_ft.jar" com.rational.test.ft.rational_ft -datastore "C:\Workspaces\RFT\Project" -projectpath "C:\Workspaces\RFT\Project\libs\inuse\kernel.jar;C:\Workspaces\RFT\Project\libs\inuse\selenium.jar" -log "Project.Test.Test" -playback "Platforms.Test.Test" -args "Test"

exception_name = java.lang.LinkageError
exception_message = loader constraint violation: when resolving overridden method "io.appium.java_client.DefaultGenericMobileDriver.findElementById(Ljava/lang/String;)Lorg/openqa/selenium/WebElement;" the class loader (instance of com/rational/test/ft/util/FtClassLoader) of the current class, io/appium/java_client/DefaultGenericMobileDriver, and its superclass loader (instance of com/rational/test/ft/util/FtClassLoader), have different Class objects for the type org/openqa/selenium/WebElement used in the signature

Answer 1

最后，我使用一个不同的触发器命令来解决这个问题：

"C:\Program Files\IBM\SDP\jdk\bin\javaw.exe" -Dfile.encoding=Cp1252 -classpath "C:\Workspaces\RFT\Project\libs\inuse\kernel.jar;C:\Workspaces\RFT\Project\libs\inuse\selenium.jar;C:\Program Files\IBM\SDP\FunctionalTester\bin\rational_ft.jar" com.rational.test.ft.rational_ft -projectpath C:\Workspaces\RFT\Project -datastore C:\Workspaces\RFT\Project -idetype wswplugin -rt.interactive true -rt.log_format html -log Platforms.Test.Test -iterationcount ALL -rt.log_action false -rt.log_screen_snapshot false -playback Platforms.Test.Test