在带有插件v1.4.0的Eclipse 3.6中,AppEngine 1.3.8 GWT 2.1.0本地任务队列不再被执行。
重现:
创建一个新的GWT和AppEngine项目(我称之为“test2”包 下文)
之前将以下内容添加到GreetingServiceImpl greetServer()方法中 回归线:
final Queue queue = QueueFactory.getDefaultQueue();
queue.add(TaskOptions.Builder.url("/taskrunner").param("id",
UUID.randomUUID().toString()));
使用以下命令在服务器包“TaskRunner”中创建一个类:
public class TaskRunner extends HttpServlet {
@Override
public void doGet(final HttpServletRequest req, final HttpServletResponse resp) throws IOException {
System.out.println("TaskRunner");
}
@Override
public void doPost(final HttpServletRequest req, final HttpServletResponse resp) throws ServletException, IOException {
System.out.println("TaskRunner");
}
}
将以下内容添加到web.xml
<servlet>
<servlet-name>taskRunner</servlet-name>
<servlet-class>test2.server.TaskRunner</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>taskRunner</servlet-name>
<url-pattern>/taskrunner</url-pattern>
</servlet-mapping>
运行项目并单击GWT按钮。大约10秒后你 将在控制台上获得以下异常:
[ERROR] Job default.task1 threw an unhandled Exception:
com.google.apphosting.api.ApiProxy$ApplicationException:
ApplicationError: 2: Received exception executing http method POST
against URL http: //0.0.0.0:8888/taskrunner: No route to host: connect
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.fetch(LocalURLFetchService.java:
239)
at com.google.appengine.api.labs.taskqueue.dev.LocalTaskQueue
$UrlFetchServiceLocalTaskQueueCallback.execute(LocalTaskQueue.java:
471)
at
com.google.appengine.api.labs.taskqueue.dev.UrlFetchJob.execute(UrlFetchJob.java:
77)
at org.quartz.core.JobRunShell.run(JobRunShell.java:203)
at org.quartz.simpl.SimpleThreadPool
$WorkerThread.run(SimpleThreadPool.java:520)
[ERROR] Job (default.task1 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception. [See
nested exception: com.google.apphosting.api.ApiProxy
$ApplicationException: ApplicationError: 2: Received exception
executing http method POST against URL http: //0.0.0.0:8888/taskrunner:
No route to host: connect]
at org.quartz.core.JobRunShell.run(JobRunShell.java:214)
at org.quartz.simpl.SimpleThreadPool
$WorkerThread.run(SimpleThreadPool.java:520)
* Nested Exception (Underlying Cause) ---------------
com.google.apphosting.api.ApiProxy$ApplicationException:
ApplicationError: 2: Received exception executing http method POST
against URL http: //0.0.0.0:8888/taskrunner: No route to host: connect
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.fetch(LocalURLFetchService.java:
239)
at com.google.appengine.api.labs.taskqueue.dev.LocalTaskQueue
$UrlFetchServiceLocalTaskQueueCallback.execute(LocalTaskQueue.java:
471)
at
com.google.appengine.api.labs.taskqueue.dev.UrlFetchJob.execute(UrlFetchJob.java:
77)
at org.quartz.core.JobRunShell.run(JobRunShell.java:203)
at org.quartz.simpl.SimpleThreadPool
$WorkerThread.run(SimpleThreadPool.java:520)
从项目中移除GWT并且它可以正常工作!为了测试这个:
添加服务器类
public class TaskRunnerTest extends HttpServlet {
public void doGet(final HttpServletRequest req, final HttpServletResponse resp) throws IOException {
final Queue queue = QueueFactory.getDefaultQueue();
queue.add(TaskOptions.Builder.url("/taskrunner").param("id", UUID.randomUUID().toString()));
}
}
添加到web.xml
<servlet>
<servlet-name>taskRunnerTest</servlet-name>
<servlet-class>test2.server.TaskRunnerTest</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>taskRunnerTest</servlet-name>
<url-pattern>/taskrunnertest</url-pattern>
</servlet-mapping>
从项目中删除GWT(取消选中使用GWT)并点击http://127.0.0.1:8888/taskrunnertest - 不会抛出任何异常。 (启用GWT后,url会抛出异常)。
这曾用于启用GWT。请有人建议修复,因为它花了我2 到目前为止。
谢谢!
答案 0 :(得分:0)
我得到了同样的错误,结果是因为我在USB 3G移动宽带棒上运行。它改变了笔记本电脑上的网络工作方式。
基本上http://0.0.0.0网址不再适用于我,localhost仍然这样做,这就是为什么我仍然可以浏览本地运行的应用程序 - 但是开发服务器上的任务队列似乎使用了0.0.0.0。