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POapp engine issue for java with frontend instances in production and blocking requests
 

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  1. POapp engine issue for java with frontend instances in production and blocking requests
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    <p>My website is <strong>sometimes</strong> getting blocked and not working every few time (other times it works fine for a long while, with the same code), getting the log I show below. Each time this happens, I have to go to my console, refresh the cache, and change in application settings the Frontend Instance Class from F1 to F2 or F4 to make possible the first loading, and once it´s done, changing back to F1 (which works perfectly after the first request). But after a while, I got again the server error and my website doesn´t work.</p> <pre><code>...Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36" ms=60615 cpu_ms=41418 loading_request=1 exit_code=104 app_engine_release=1.8.4 instance=00c61b117cd6a25994d15ffe59bc99e20e5cb2bb I 2013-09-06 17:06:12.201 javax.servlet.ServletContext log: Initializing Spring root WebApplicationContext I 2013-09-06 17:06:50.336 javax.servlet.ServletContext log: Initializing Spring FrameworkServlet 'mvc-dispatcher' E 2013-09-06 17:07:03.075 org.springframework.web.servlet.FrameworkServlet initServletBean: Context initialization failed org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: URL [jar:file:/base/data/home/apps/s~comprarebookhoy/1.370036978402952713/WEB-INF/lib/objectify-4.0b2.jar!/com/googlecode/objectify/repackaged/gentyref/CaptureType.class]; nested exception is com.google.apphosting.api.DeadlineExceededException: This request (1de39e8e35c0b3f7) started at 2013/09/07 00:06:03.615 UTC and was still executing at 2013/09/07 00:07:03.073 UTC. at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:261) at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:242) at org.springframework.context.annotation.ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:84) at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1431) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1421) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:184) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:140) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:111) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:131) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:535) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:449) at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:638) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:595) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:652) at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:514) at org.springframework.web.servlet.FrameworkServlet.**initServletBean(FrameworkServlet.java:455)** at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:138) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) 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.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:219) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:194) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:134) at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439) at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:435) at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:442) at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:186) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:306) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:298) at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:439) at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251) at java.lang.Thread.run(Thread.java:722) Caused by: com.google.apphosting.api.**DeadlineExceededException: **This request (1de39e8e35c0b3f7) started at 2013/09/07 00:06:03.615 UTC and was still executing at** 2013/09/07 00:07:03.073 UTC.** at java.security.AccessController.doPrivileged(Native Method) at java.io.FilePermission.init(FilePermission.java:209) at java.io.FilePermission.&lt;init&gt;(FilePermission.java:285) at java.lang.SecurityManager.checkRead(SecurityManager.java:888) at java.util.zip.ZipFile.&lt;init&gt;(ZipFile.java:217) at java.util.zip.ZipFile.&lt;init&gt;(ZipFile.java:156) at java.util.jar.JarFile.&lt;init&gt;(JarFile.java:153) at java.util.jar.JarFile.&lt;init&gt;(JarFile.java:90) at sun.net.www.protocol.jar.URLJarFile.&lt;init&gt;(URLJarFile.java:93) at sun.net.www.protocol.jar.URLJarFile.getJarFile(URLJarFile.java:69) at sun.net.www.protocol.jar.JarFileFactory.get(JarFileFactory.java:88) at sun.net.www.protocol.jar.JarURLConnection.connect(JarURLConnection.java:122) at sun.net.www.protocol.jar.JarURLConnection.getInputStream(JarURLConnection.java:150) at org.springframework.core.io.UrlResource.getInputStream(UrlResource.java:125) at org.springframework.core.type.classreading.SimpleMetadataReader.&lt;init&gt;(SimpleMetadataReader.java:49) at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:80) at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:101) at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:237) ... 48 more E 2013-09-06 17:07:03.077 javax.servlet.ServletContext log: unavailable org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: URL [jar:file:/base/data/home/apps/s~comprarebookhoy/1.370036978402952713/WEB-INF/lib/objectify-4.0b2.jar!/com/googlecode/objectify/repackaged/gentyref/CaptureType.class]; nested exception is com.google.apphosting.api.DeadlineExceededException: This request (1de39e8e35c0b3f7) started at 2013/09/07 00:06:03.615 UTC and was still executing at 2013/09/07 00:07:03.073 UTC. at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:261) at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:242) at org.springframework.context.annotation.ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:84) at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1431) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1421) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:184) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:140) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:111) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:131) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:535) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:449) at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:638) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:595) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:652) at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:514) at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:455) at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:138) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) 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.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:219) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:194) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:134) at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439) at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:435) at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:442) at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:186) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:306) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:298) at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:439) at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251) at java.lang.Thread.run(Thread.java:722) Caused by: com.google.apphosting.api.DeadlineExceededException: This request (1de39e8e35c0b3f7) started at 2013/09/07 00:06:03.615 UTC and was still executing at 2013/09/07 00:07:03.073 UTC. at java.security.AccessController.doPrivileged(Native Method) at java.io.FilePermission.init(FilePermission.java:209) at java.io.FilePermission.&lt;init&gt;(FilePermission.java:285) at java.lang.SecurityManager.checkRead(SecurityManager.java:888) at java.util.zip.ZipFile.&lt;init&gt;(ZipFile.java:217) at java.util.zip.ZipFile.&lt;init&gt;(ZipFile.java:156) at java.util.jar.JarFile.&lt;init&gt;(JarFile.java:153) at java.util.jar.JarFile.&lt;init&gt;(JarFile.java:90) at sun.net.www.protocol.jar.URLJarFile.&lt;init&gt;(URLJarFile.java:93) at sun.net.www.protocol.jar.URLJarFile.getJarFile(URLJarFile.java:69) at sun.net.www.protocol.jar.JarFileFactory.get(JarFileFactory.java:88) at sun.net.www.protocol.jar.JarURLConnection.connect(JarURLConnection.java:122) at sun.net.www.protocol.jar.JarURLConnection.getInputStream(JarURLConnection.java:150) at org.springframework.core.io.UrlResource.getInputStream(UrlResource.java:125) at org.springframework.core.type.classreading.SimpleMetadataReader.&lt;init&gt;(SimpleMetadataReader.java:49) at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:80) at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:101) at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:237) ... 48 more W 2013-09-06 17:07:03.122 (my url) javax.servlet.ServletException: com.google.apphosting.api.ApiProxy$CancelledException: **The API call memcache.Get() was explicitly cancelled**. at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:268) 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$RequestHandler.headerComplete(HttpConnection.java:923) at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146) at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439) at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:435) at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:442) at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:186) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:306) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:298) at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:439) at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251) at java.lang.Thread.run(Thread.java:722) Caused by: com.google.apphosting.api.ApiProxy$CancelledException: The API call memcache.Get() was explicitly cancelled. at com.google.apphosting.runtime.ApiProxyImpl$5.get(ApiProxyImpl.java:386) at com.google.apphosting.runtime.ApiProxyImpl$5.get(ApiProxyImpl.java:383) at com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:90) at com.google.appengine.api.memcache.MemcacheServiceImpl.quietGet(MemcacheServiceImpl.java:28) at com.google.appengine.api.memcache.MemcacheServiceImpl.get(MemcacheServiceImpl.java:51) at com.google.apphosting.runtime.jetty.MemcacheSessionStore.getSession(MemcacheSessionStore.java:36) at com.google.apphosting.runtime.jetty.SessionManager.loadSession(SessionManager.java:327) at com.google.apphosting.runtime.jetty.SessionManager.getSession(SessionManager.java:301) at org.mortbay.jetty.servlet.AbstractSessionManager.getHttpSession(AbstractSessionManager.java:237) at org.mortbay.jetty.servlet.SessionHandler.setRequestedId(SessionHandler.java:246) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:136) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266) ... 16 more W 2013-09-06 17:07:03.123 Nested in javax.servlet.ServletException: com.google.apphosting.api.ApiProxy$CancelledException: The API call memcache.Get() was explicitly cancelled.: com.google.apphosting.api.ApiProxy$CancelledException: The API call memcache.Get() was explicitly cancelled. at com.google.apphosting.runtime.ApiProxyImpl$5.get(ApiProxyImpl.java:386) at com.google.apphosting.runtime.ApiProxyImpl$5.get(ApiProxyImpl.java:383) at com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:90) at com.google.appengine.api.memcache.MemcacheServiceImpl.quietGet(MemcacheServiceImpl.java:28) at com.google.appengine.api.memcache.MemcacheServiceImpl.get(MemcacheServiceImpl.java:51) at com.google.apphosting.runtime.jetty.MemcacheSessionStore.getSession(MemcacheSessionStore.java:36) at com.google.apphosting.runtime.jetty.SessionManager.loadSession(SessionManager.java:327) at com.google.apphosting.runtime.jetty.SessionManager.getSession(SessionManager.java:301) at org.mortbay.jetty.servlet.AbstractSessionManager.getHttpSession(AbstractSessionManager.java:237) at org.mortbay.jetty.servlet.SessionHandler.setRequestedId(SessionHandler.java:246) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:136) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$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:146) at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439) at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:435) at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:442) at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:186) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:306) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:298) at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:439) at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251) at java.lang.Thread.run(Thread.java:722) I 2013-09-06 17:07:03.131 This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application. W 2013-09-06 17:07:03.131 A problem was encountered with the process that handled this request, causing it to exit. This is likely to cause a new process to be used for the next request to your application. If you see this message frequently, you may be throwing exceptions during the initialization of your application. (Error code 104) </code></pre> <p>In my local environment I don´t get this problem. Looks like some kind of issues between the spring framework and the cache used by gae, but no idea what´s going on here... any suggestions please?</p> <p>It also looks to be related with the front end instances, i think i have always one after the first request, but for some reason, at some moments goes shutdown and i have to change again to the F4 option to make it work, otherwise I got server error.</p> <p>And from the logs, it´s possible objectify is making some kind of exception provoking the issue, i´m using version 4.0b2</p> <p>I found also a related bug in app engine for the part: <code>"ApiProxy$CancelledException: The API call memcache.Get() was explicitly cancelled."</code></p> <p><a href="https://code.google.com/p/googleappengine/issues/detail?id=7107" rel="nofollow">https://code.google.com/p/googleappengine/issues/detail?id=7107</a></p>
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