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Http 503 error gwt jetty server SERVICE_UNAVAILABLE

I get a 503 error from an integrated eclipse jetty server when I run a project in a web browser. I get this error since I changed the gae application id of the project.

java.lang.ClassNotFoundException: com.google.api.server.spi.SystemServiceServlet at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:176) at java.lang.ClassLoader.loadClass(Unknown Source) at org.mortbay.util.Loader.loadClass(Loader.java:91) at org.mortbay.util.Loader.loadClass(Loader.java:71) at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:73) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:242) 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 org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:224) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:191) at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:239) at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:146) at com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:97) at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509) at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068) at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811) at com.google.gwt.dev.DevMode.main(DevMode.java:311) 21.08.2012 16:09:42 com.google.appengine.tools.development.ApiProxyLocalImpl log SCHWERWIEGEND: javax.servlet.ServletContext log: unavailable javax.servlet.UnavailableException: com.google.api.server.spi.SystemServiceServlet at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:79) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:242) 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 org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:224) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerS ervice.java:191) at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:239) at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:146) at com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:97) at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509) at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068) at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811) at com.google.gwt.dev.DevMode.main(DevMode.java:311) 21.08.2012 16:09:42 com.google.apphosting.utils.jetty.JettyLogger warn WARNUNG: failed SystemServiceServlet: java.lang.NullPointerException 21.08.2012 16:09:43 com.google.apphosting.utils.jetty.JettyLogger warn WARNUNG: Failed startup of context c om.google.appengine.tools.development.DevAppEngineWebAppContext@ 9f4160a{/,C:\Users\dp\work space\fooApp\war} java.lang.NullPointerException at java.lang.Class.isAssignableFrom(Native Method) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:256) 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 org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:224) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:191) at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:239) at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:146) at com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:97) at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509) at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068) at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811) at com.google.gwt.dev.DevMode.main(DevMode.java:311) 21.08.2012 16:09:46 com.google.appengine.tools.development.DevAppServerImpl start INFO: The server is running at http://localhost:8888/ 21.08.2012 16:09:46 com.google.appengine.tools.development.DevAppServerImpl start INFO: The admin console is running at http://localhost:8888/_ah/admin

this is my web.xml file

 <!-- Default page to serve --> <welcome-file-list> <welcome-file>fooApp.html</welcome-file> </welcome-file-list> <servlet> <servlet-name>phonegapfileapi</servlet-name> <servlet class>com.googlecode.gwtphonegap.server.file.FileRemoteServiceServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>phonegapfileapi</servlet-name> <url-pattern>/showcase/phonegapfileapi</url-pattern> </servlet-mapping> <servlet> <servlet-name>SystemServiceServlet</servlet-name> <servlet-class>com.google.api.server.spi.SystemServiceServlet</servlet-class> <init-param> <param-name>services</param-name> <param-value/> </init-param> </servlet> <servlet-mapping> <servlet-name>SystemServiceServlet</servlet-name> <url-pattern>/_ah/spi/*</url-pattern> </servlet-mapping>

all banks are in fooApp / war / WEB-INF / lib how can I solve this problem? please, help.

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3 answers

I ran into the same problem. The SystemServiceServlet seems to be needed only if you want to deploy web admin servlets in a berth.

In my case, the problem was that the GAE eclipse plugin used the default GAE Java SDK 1.6 , and the com.google.api.server package does not even exist. I fixed it by installing the SDK manually on the GAE SDK 1.7 .

Be careful when changing the SDK, I tried to change the default SDK, but still had this problem until I selected "Use a specific SDK" indicating 1.7.

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The solution in my situation is to just kill the whole javaw.exe * 32 process in the task manager.

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I am using maven but had the same problem. With maven, we don’t have the SDK version installed in the project properties, instead we have this plugin:

 <plugin> <groupId>com.google.appengine</groupId> <artifactId>appengine-maven-plugin</artifactId> <version>1.8.3</version>

To resolve the exception : Window/Show View/Other... > Servers/Server , and then right-click on the AppEngine server you are using, then click Clean...

Note: this will destroy the local data store, so back up the file if you want to save your data:

... / workspace /.metadata/.plugins/org.eclipse.wst.server.core/TMP $ {SERVER_NUM} / $ {DEPLOYED_APP_NAME} /WEB-INF/appengine-generated/local_db.bin>

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Source: https://habr.com/ru/post/924755/

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