Server instance get exception: no valid instance id for this instance

Question

When I change the logging level to FINE in my Google App Engine application on the local host, I start to see them in the trace stack:

 Apr 17, 2013 4:54:20 PM com.google.appengine.tools.development.DevAppServerServersFilter getCurrentServerInstance FINE: Exception getting server instance com.google.appengine.api.labs.servers.ServersException: No valid instance id for this instance. at com.google.appengine.api.labs.servers.ServersServiceImpl.getCurrentInstanceId(ServersServiceImpl.java:75) at com.google.appengine.tools.development.DevAppServerServersFilter.getCurrentServerInstance(DevAppServerServersFilter.java:210) at com.google.appengine.tools.development.DevAppServerServersFilter.isServerLoadBalancingServerRequest(DevAppServerServersFilter.java:185) at com.google.appengine.tools.development.DevAppServerServersFilter.getRequestType(DevAppServerServersFilter.java:174) at com.google.appengine.tools.development.DevAppServerServersFilter.doFilter(DevAppServerServersFilter.java:112) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:94) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:421) 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$RequestHandler.headerComplete(HttpConnection.java:923) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) 

Any ideas what this is and how to fix it?

Answer 1

This is a known issue in the dev server:
https://code.google.com/p/googleappengine/issues/detail?id=10412

It has been known for some time, so I'm not sure that they will fix it.

Answer 2

I think that when setting up logging on FINE, you should expect some false log messages. I set the logging level to FINE only for your code and left the rest to the default level.