There seems to be some kind of error when I import CodeLabEx1 into Eclipse Keplar:
<https://lh5.googleusercontent.com/-qHMWqzQ775Y/UfnB6PTr_dI/AAAAAAAAADc/-kJGkW6pqUw/s1600/Screenshot+%2813%29.png> Does anyone know what might be wrong here? The output when I try to run the application is as follows: Jul 31, 2013 5:13:35 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml INFO: Successfully processed C:\Users\Eric\Desktop\CodeLabEx1-starter\CodeLabEx1-starter\war\WEB-INF/appengine-web.xml Jul 31, 2013 5:13:35 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml SEVERE: Received exception processing C:\Users\Eric\Desktop\CodeLabEx1-starter\CodeLabEx1-starter\war\WEB-INF/appengine-web.xml com.google.apphosting.utils.config.AppEngineConfigException: appengine-web.xml does not contain a <threadsafe> element. See http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests for more information. You probably want to enable concurrent requests. at com.google.apphosting.utils.config.AppEngineWebXmlReader.readAppEngineWebXml(AppEngineWebXmlReader.java:85) at com.google.apphosting.utils.config.EarHelper.readWebModule(EarHelper.java:166) at com.google.appengine.tools.development.ApplicationConfigurationManager$WarModuleConfigurationHandle.readConfiguration(ApplicationConfigurationManager.java:399) at com.google.appengine.tools.development.ApplicationConfigurationManager.<init>(ApplicationConfigurationManager.java:146) at com.google.appengine.tools.development.ApplicationConfigurationManager.newWarConfigurationManager(ApplicationConfigurationManager.java:88) at com.google.appengine.tools.development.DevAppServerImpl.<init>(DevAppServerImpl.java:137) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.google.appengine.tools.development.DevAppServerFactory.createDevAppServer(DevAppServerFactory.java:233) at com.google.appengine.tools.development.DevAppServerFactory.createDevAppServer(DevAppServerFactory.java:87) at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:380) at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48) at com.google.appengine.tools.development.DevAppServerMain.<init>(DevAppServerMain.java:334) at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:310) com.google.apphosting.utils.config.AppEngineConfigException: Invalid configuration at com.google.appengine.tools.development.DevAppServerImpl.reportDeferredConfigurationException(DevAppServerImpl.java:414) at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:211) at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:399) at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48) at com.google.appengine.tools.development.DevAppServerMain.<init>(DevAppServerMain.java:334) at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:310) Caused by: com.google.apphosting.utils.config.AppEngineConfigException: Invalid appengine-web.xml(C:\Users\Eric\Desktop\CodeLabEx1-starter\CodeLabEx1-starter\war\WEB-INF/appengine-web.xml) - appengine-web.xml does not contain a <threadsafe> element. See http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests for more information. You probably want to enable concurrent requests. at com.google.apphosting.utils.config.EarHelper.readWebModule(EarHelper.java:168) at com.google.appengine.tools.development.ApplicationConfigurationManager$WarModuleConfigurationHandle.readConfiguration(ApplicationConfigurationManager.java:399) at com.google.appengine.tools.development.ApplicationConfigurationManager.<init>(ApplicationConfigurationManager.java:146) at com.google.appengine.tools.development.ApplicationConfigurationManager.newWarConfigurationManager(ApplicationConfigurationManager.java:88) at com.google.appengine.tools.development.DevAppServerImpl.<init>(DevAppServerImpl.java:137) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.google.appengine.tools.development.DevAppServerFactory.createDevAppServer(DevAppServerFactory.java:233) at com.google.appengine.tools.development.DevAppServerFactory.createDevAppServer(DevAppServerFactory.java:87) at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:380) ... 3 more -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. 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