我托管我的应用程序在谷歌应用程序引擎。我的应用程序应该做的是每两分钟连接一个网站,解析它并使用C2DM将必要的信息发送到我的设备。我首先测试了我的应用程序,看看它是否能够正常工作它工作正常。但为了每两分钟检查一次webiste,我在while循环中放入必要的方法,然后将Thread.sleep(120000)放在while循环中。它有一段时间,但现在我得到这个: 从servlet未捕获的异常 com.google.apphosting.runtime.HardDeadlineExceededError:此请求(f6b9f0b8e1ec6f23)在2011年6月10日上午10:24:22.514开始,并仍在执行2011/06/09 10:24:52.824 UTC。谷歌应用引擎HardDeadlineExceededError
因此,在两分钟之前,每件事情都可以。
,这是整个错误消息:
Uncaught exception from servlet
com.google.apphosting.runtime.HardDeadlineExceededError: This request (f6b9f0b8e1ec6f23) started at 2011/06/09 10:24:22.514 UTC and was still executing at 2011/06/09 10:24:52.824 UTC.
at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:408)
at java.lang.StringBuilder.append(StringBuilder.java:136)
at java.lang.StringBuilder.<init>(StringBuilder.java:110)
at tripplannerServer.ParseVerstoring.parsePlanned(ParseVerstoring.java:50)
at tripplannerServer.SendMessage2.geplandeVerstoring(SendMessage2.java:257)
at tripplannerServer.TripplannerServerServlet.doGet(TripplannerServerServlet.java:152)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:97)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
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 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.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:238)
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$RequestHandler.headerComplete(HttpConnection.java:923)
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:135)
at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:260)
at com.google.apphosting.base.RuntimePb$EvaluationRuntime$2.handleRequest(RuntimePb.java:9669)
at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:439)
at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:573)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:448)
at com.google.tracing.TraceContext.runInContext(TraceContext.java:688)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:326)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:318)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:446)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)
不知道如何解决这个问题?或者使用Thread.sleep()的想法不好?如果不是,我该如何让应用程序每两分钟检查一次网站?
预先感谢您。
谢谢你的回答。我是否必须从头开始重写我的代码才能使此cron.xml工作,或者我可以将cron“集成”到现有应用程序中?我想Google会收费使用Backends,对吧?我问这些问题是因为我从来没有听过/使用过cron.xml或Backends – mnish 2011-06-09 13:54:18
@mnish crom.xml中的应用程序只是一个servlet。我想你只需要删除睡眠()和循环来创建单次运行的sevlet。选中[链接](http://code.google.com/appengine/docs/java/configyaml/cron。html)以获取有关cron.xml的详细信息。 – ShuaiYuan 2011-06-12 17:11:16