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POGAE Blobstore IllegalStateException: NO CONTENT
 

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  1. POGAE Blobstore IllegalStateException: NO CONTENT
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    <p>When attempting to serve a file from the blobstore via BlobstoreService.serve(key, res), I get the following error:</p> <pre><code>WARNING: /path/to/servlet java.lang.IllegalStateException: NO CONTENT at org.mortbay.jetty.HttpGenerator.addContent(HttpGenerator.java:106) at org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:644) at org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:579) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.copy(ServeBlobFilter.java:129) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.serveBlob(ServeBlobFilter.java:185) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:64) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97) at org.mortbay.jetty.servlet.ServletHandler$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$ApiProxyHandler.handle(JettyContainerService.java:370) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$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) </code></pre> <p>If I attempt to download from this URL using a browser, the browser stores a file of size 0 bytes. I am testing this on the dev server from SDK 1.7.1. </p> <p>I am using Jersey to create the REST API, which seems to be causing the problem. If I create a regular servlet, it serves the file properly. I wonder whether this is an issue with using the @GET annotation, which requires that the function return something. However, if I return anything, the blobstore complains and tells me that it has been preempted by data that has already been sent.</p> <p>The service doesn't even seem to be sending any headers back in response to a request.</p> <p>Here is the code that is supposed to send the response:</p> <pre><code>@GET public void getAirport(@PathParam(APIUtils.VERSION_NAME) String versionName, @Context HttpServletResponse res) throws IOException { BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService(); DataDAO dao = new DataDAO(); BlobKey key = dao.getAirportBlobKey(versionName); if(key == null) { res.sendError(HttpServletResponse.SC_NOT_FOUND, "No airport record found for: " + versionName); } else { blobstoreService.serve(key, res); } } </code></pre> <p>Any ideas?</p>
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    1. USrbanffy
    1. USAlex
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    1. CODo you see the same problem in production?
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      1. USPeter Knego
    2. COI do. It seems that I have solved the problem for now (see answer below).
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      1. USAlex
 

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