Question

在最后几天，我一直在尝试在Eclipse中生成云端点库时遇到此错误。

这里是完整的错误日志：

eclipse.buildId=I20120608-1400
java.version=1.6.0_31
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=it_IT
Framework arguments:  -product org.eclipse.epp.package.jee.product
Command-line arguments:  -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.jee.product

Error
Wed Sep 26 09:39:46 CEST 2012
Unexpected Exception

com.google.api.client.http.HttpResponseException: 503 Service Unavailable
{
 "error": {
  "errors": [
   {
    "domain": "global",
    "reason": "backendError",
    "message": "Backend Error"
   }
  ],
  "code": 503,
  "message": "Backend Error"
 }
}

at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:861)
at com.google.api.server.spi.tools.CloudDiscoveryDocGenerator.postRequest(CloudDiscoveryDocGenerator.java:61)
at com.google.api.server.spi.tools.CloudDiscoveryDocGenerator.generateDiscoveryDoc(CloudDiscoveryDocGenerator.java:53)
at com.google.gdt.eclipse.appengine.swarm.wizards.helpers.SwarmApiCreator.generateAndWriteDiscovery(SwarmApiCreator.java:217)
at com.google.gdt.eclipse.appengine.swarm.wizards.helpers.SwarmApiCreator.createClientLibFromApiConfig(SwarmApiCreator.java:177)
at com.google.gdt.eclipse.appengine.swarm.wizards.helpers.SwarmApiCreator.createSwarmApi(SwarmApiCreator.java:169)
at com.google.gdt.eclipse.appengine.swarm.wizards.helpers.SwarmServiceCreator.create(SwarmServiceCreator.java:190)
at com.google.gdt.eclipse.appengine.swarm.wizards.helpers.SwarmServiceCreator$1.run(SwarmServiceCreator.java:271)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
at com.google.gdt.eclipse.appengine.swarm.wizards.helpers.SwarmServiceCreator.createWebApi(SwarmServiceCreator.java:267)
at com.google.gdt.eclipse.appengine.swarm.wizards.GenerateSwarmApiAction.run(GenerateSwarmApiAction.java:79)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4169)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3758)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1022)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:916)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:585)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:540)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)

起初我认为这是我的错，但现在我从android项目重新创建了一个简单的app-engine后端项目，但仍然存在同样的问题。

请按照我的预定时间帮助我，这让我太过分了。

如果我尝试在app-engine上部署，那么没有问题......

感谢。

Answer 1

最常见的问题是原始类型，返回值或参数。 sdk 1.8.2中支持集合此问题的另一个来源是@Api注释的name属性的值。如果值包含点或短划线，则抛出相同的异常。值应与https://developers.google.com/appengine/docs/java/endpoints/annotations

中所述的以下正则表达式[a-z] + [A-Za-z0-9] *匹配

希望有所帮助

Answer 2

就我而言，问题是对其中一个API使用了错误的HTTP方法。错误地，我将其中一个方法的 httpMethod 属性设置为“UPDATE”但是没有这样的HTTP方法。我将其更改为 HttpMethod.POST 并且 503服务器错误已消失。

注意：请始终使用 com.google.api.server.spi.config.ApiMethod.HttpMethod 设置httpMethod属性。

在Eclipse 4.2中生成云端点时出错

2 个答案: