“来自servlet的未捕获异常”，GAE部署错误

时间：2011-11-17 04:51:53

标签： java spring google-app-engine spring-security

我在部署GAE应用程序时遇到以下错误。这是什么原因？ 堆叠回溯到下面。 

 Uncaught exception from servlet
    com.google.apphosting.runtime.HardDeadlineExceededError: This request (0000000000000000) started at 2011/11/17 04:12:01.160 UTC and was still executing at 2011/11/17 04:13:01.204 UTC.
        at com.google.appengine.runtime.Request.process-0000000000000000(Request.java)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
        at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
        at org.springframework.expression.spel.standard.SpelExpressionParser.doParseExpression(SpelExpressionParser.java:56)
        at org.springframework.expression.spel.standard.SpelExpressionParser.doParseExpression(SpelExpressionParser.java:1)
        at org.springframework.expression.common.TemplateAwareExpressionParser.parseExpression(TemplateAwareExpressionParser.java:66)
        at org.springframework.expression.common.TemplateAwareExpressionParser.parseExpression(TemplateAwareExpressionParser.java:56)
        at org.springframework.security.web.access.expression.ExpressionBasedFilterInvocationSecurityMetadataSource.processMap(ExpressionBasedFilterInvocationSecurityMetadataSource.java:47)
        at org.springframework.security.web.access.expression.ExpressionBasedFilterInvocationSecurityMetadataSource.<init>(ExpressionBasedFilterInvocationSecurityMetadataSource.java:29)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:33)
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:126)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:108)
        at org.springframework.beans.factory.support.ConstructorResolver$1.run(ConstructorResolver.java:274)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:272)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1003)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:907)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:270)
        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:125)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1325)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
        at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
        at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)
        at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
        at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
        at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
        at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
        at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:449)
        at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:455)
        at com.google.tracing.TraceContext.runInContext(TraceContext.java:695)
        at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:333)
        at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:325)
        at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:453)
        at java.lang.Thread.run(Thread.java:679)

以下解释：

此请求导致为您的应用程序启动了一个新进程，从而导致您的应用程序代码首次加载。因此，此请求可能需要更长的时间，并且使用的CPU比典型的应用程序请求更多。

处理此请求的进程遇到严重问题，导致其退出。这可能会导致新进程用于您的应用程序的下一个请求。如果经常看到此消息，则可能会在应用程序初始化期间抛出异常。 （错误代码104）

3 个答案:

答案 0 :(得分：1)

正如它在stacktrace中所说的那样：

HardDeadlineExceededError: This request (0000000000000000) started at 2011/11/17 04:12:01.160 UTC and was still executing at 2011/11/17 04:13:01.204 UTC.

对App Engine应用程序的前端请求有60秒完成。如果您的请求需要更长时间，则会终止。如果你需要做很多工作，你应该在任务队列上进行。

答案 1 :(得分：0)

您需要优化应用程序以进行快速设置。例如：

  • 使用轻量级框架
  • 减少框架设置中的类扫描（发现）
  • 最小化ServletContextListener＃contextInitialized
    • 中的操作

GAE应用程序优化还有很长的路要走，祝你好运; - ）

答案 2 :(得分：0)

最后，我们通过从hibernate配置中删除<prop key="hibernate.hbm2ddl.auto">update</prop>来对问题进行排序，该配置用于在创建SessionFactory时自动将模式DDL导出到数据库。

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