为什么从 eclipse 运行 Google App 时会出现以下错误？

Why am I getting the following error when running Google App from eclipse?

提问by 8oh8

I did a search and found QuickTip: VerifyError with jdk 7:

我进行了搜索，发现QuickTip: VerifyError with jdk 7：

If you are struggling with the following kind of error

java.lang.VerifyError: Expecting a stackmap frame at branch target 6 bla bla bla …

then a simple solution is to add the following default JVM argument -XX:-UseSplitVerifier

If you are doing it in eclipse, like i was, then goto Window -> Preferences -> Installed JREs -> and add the default parameter.

What does this setting do? Oracle just mentionsthat it a new type checker with StackMapTable attributes. Huh! Enjoy! It is Oracle now.

如果您遇到以下错误

java.lang.VerifyError: Expecting a stackmap frame at branch target 6 bla bla bla …

那么一个简单的解决方案是添加以下默认的 JVM 参数 -XX:-UseSplitVerifier

如果您像我一样在 Eclipse 中执行此操作，则转到 Window -> Preferences -> Installed JREs -> 并添加默认参数。

这个设置有什么作用？Oracle只是提到它是一个具有 StackMapTable 属性的新类型检查器。哼！享受！现在是甲骨文。

However, when I go to the Installed JREs settings it says An error has occurred when creating this preference page

但是，当我转到已安装的 JRE 设置时，它说 An error has occurred when creating this preference page

I started learning about Google App Engine and began with Google's CodeLabEx0, and I think it worked out fine because I saw on my browser what I was supposed to see. But when I moved on to the second chapter CodeLabEx1, there's an error that won't allow me to create any products or items through the browser interface. Then I looked at the eclipse console and saw this:

我开始学习 Google App Engine 并从 Google 的 CodeLabEx0 开始，我认为它运行良好，因为我在浏览器上看到了我应该看到的内容。但是当我转到第二章 CodeLabEx1 时，出现一个错误，不允许我通过浏览器界面创建任何产品或项目。然后我查看了 eclipse 控制台，看到了这个：

Oct 28, 2011 11:40:30 PM com.google.apphosting.utils.jetty.JettyLogger info
INFO: Logging to JettyLogger(null) via com.google.apphosting.utils.jetty.JettyLogger
Oct 28, 2011 11:40:31 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
INFO: Successfully processed C:\Users\rock84\Downloads\CodeLabEx1\CodeLabEx1\war\WEB-INF/appengine-web.xml
Oct 28, 2011 11:40:31 PM com.google.apphosting.utils.config.AbstractConfigXmlReader readConfigXml
INFO: Successfully processed C:\Users\rock84\Downloads\CodeLabEx1\CodeLabEx1\war\WEB-INF/web.xml
Oct 28, 2011 4:40:31 PM com.google.appengine.tools.development.DevAppServerImpl start
INFO: The server is running at http://localhost:8888/
Oct 28, 2011 11:40:59 PM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: Error for /product
java.lang.VerifyError: Expecting a stackmap frame at branch target 48 in method com.google.appengine.codelab.ProductServlet.doPut(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V at offset 38
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.newInstance0(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
    at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:428)
    at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
    at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:58)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
    at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:351)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:326)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

I have no idea what this could be. This is a fresh install of Eclipse 3.7 with the following installed software:

我不知道这可能是什么。这是 Eclipse 3.7 的全新安装，安装了以下软件：

• Eclipse IDE for Java Developers
• Google App Engine Java SDK 1.5.5
• Gooogle Plugin for Eclipse 3.7
• Google Web Toolkit SDK 2.4.0

• 面向 Java 开发人员的 Eclipse IDE
• 谷歌应用引擎 Java SDK 1.5.5
• 适用于 Eclipse 3.7 的 Google 插件
• 谷歌网络工具包 SDK 2.4.0

I'm on Windows 7 64-bit with Java version 1.7.0

我使用的是带有 Java 1.7.0 版的 Windows 7 64 位

回答by 8oh8

Ok, I found the solution. It's what I wrote at the very top. Turns out I was adding the argument to the wrong eclipse installation. It works now.

好的，我找到了解决方案。这是我在最上面写的。原来我是将参数添加到错误的 eclipse 安装中。它现在有效。

"If you are struggling with the following kind of error java.lang.VerifyError: Expecting a stackmap frame at branch target 6 bla bla bla …. then a simple solution is to add the following default JVM argument -XX:-UseSplitVerifier If you are doing it in eclipse, like i was, then goto Window -> Preferences -> Installed JREs -> and add the default parameter. What does this setting do? Oracle just mentions that it a new type checker with StackMapTable attributes. Huh! Enjoy! It is Oracle now." Thanks to this dude: http://vikashazrati.wordpress.com/2011/10/09/quicktip-verifyerror-with-jdk-7/

“如果您遇到以下类型的错误 java.lang.VerifyError: Expecting a stackmap frame at branch target 6 bla bla bla .... 那么一个简单的解决方案是添加以下默认 JVM 参数 -XX:-UseSplitVerifier 如果您是像我一样在 Eclipse 中执行此操作，然后转到 Window -> Preferences -> Installed JREs -> 并添加默认参数。此设置有什么作用？Oracle 只是提到它是一个具有 StackMapTable 属性的新类型检查器。呵呵！享受！现在是甲骨文。” 感谢这个家伙：http: //vikashazrati.wordpress.com/2011/10/09/quicktip-verifyerror-with-jdk-7/

回答by Boude

This is also possible by changing your run configuration: Run > Run configurations

这也可以通过更改运行配置来实现：运行 > 运行配置

Pick your Web Application project from the left, open the Arguments tab and add the -XX:-UseSplitVerifier argument to the VM arguments.

从左侧选择您的 Web 应用程序项目，打开参数选项卡并将 -XX:-UseSplitVerifier 参数添加到 VM 参数。

The benefits of this approach is also its downside: it only applies to this project, instead of an entire VM installation.

这种方法的好处也是它的缺点：它只适用于这个项目，而不是整个 VM 安装。

回答by Radek Skokan

I had similar problem when deploying my GWT app in GAE and I was using JDK 7. Switching the project to JDK 6 solved that issue (I forgot that at this time only JDK 5 and 6 is supported by GAE).

我在 GAE 中部署 GWT 应用程序时遇到了类似的问题，我使用的是 JDK 7。将项目切换到 JDK 6 解决了这个问题（我忘记了此时 GAE 仅支持 JDK 5 和 6）。