We're surfacing a bad error here. Basically, you get this error message if
you hold the file open too long; we recommend around 30 seconds.
I'll file a bug internally to get a better error message. Can you break this
up into multiple writes?
--
Ikai Lan
Developer Programs Engineer, Google App Engine
plus.ikailan.com | twitter.com/ikai
On Wed, Aug 17, 2011 at 5:32 PM, Mike Prince <m...@mikeprince.com> wrote:
> I'm trying to write a Java serialized HashMap<String,Long> to the
> blobstore using the FileService and getting an "Unknown" error 10.
> I'm guessing there's 10,000+ items in the map.
>
> Below is the code I'm using, followed by the stack trace.
>
> Can someone clue me in on what I'm doing wrong? And yes, it works
> fine in the development environment ;)
>
> Thanks,
>
> Mike
>
>
> public class Filer
> {
> private static final FileService fileService =
> FileServiceFactory.getFileService();
> private static final BlobstoreService blobstoreService =
> BlobstoreServiceFactory.getBlobstoreService();
>
> public static String save( Object value )
> throws IOException
> {
> if( value == null ) return null;
>
> AppEngineFile file = fileService.createNewBlobFile(
> "text/plain" );
> return save( file, value );
> }
>
> private static String save( AppEngineFile file, Object value )
> throws IOException
> {
> // Open a channel and write out object
> FileWriteChannel writeChannel =
> fileService.openWriteChannel( file,
> true );
> ObjectOutputStream out = new
> ObjectOutputStream( Channels.newOutputStream( writeChannel ) );
> out.writeObject( value );
>
> // Close it up
> out.close();
> writeChannel.closeFinally();
>
> return file.getFullPath();
> }
>
>
>
> And here's the exception...
>
>
> org.apache.jsp.tasks.create_002duser_002dsegment_jsp _jspService:
> Failed to create user segment
> java.io.IOException
> at
>
> com.google.appengine.api.files.FileServiceImpl.translateException(FileServiceImpl.java:
> 501)
> at
>
> com.google.appengine.api.files.FileServiceImpl.makeSyncCall(FileServiceImpl.java:
> 479)
> at
> com.google.appengine.api.files.FileServiceImpl.append(FileServiceImpl.java:
> 426)
> at
> com.google.appengine.api.files.FileServiceImpl.append(FileServiceImpl.java:
> 171)
> at
>
> com.google.appengine.api.files.FileWriteChannelImpl.write(FileWriteChannelImpl.java:
> 49)
> at
>
> com.google.appengine.api.files.FileWriteChannelImpl.write(FileWriteChannelImpl.java:
> 41)
> at java.nio.channels.Channels.write(Channels.java:80)
> at java.nio.channels.Channels.access$000(Channels.java:64)
> at java.nio.channels.Channels$1.write(Channels.java:151)
> at java.io.ObjectOutputStream
> $BlockDataOutputStream.drain(ObjectOutputStream.java:1855)
> at java.io.ObjectOutputStream
> $BlockDataOutputStream.setBlockDataMode(ObjectOutputStream.java:1764)
> at
> java.io.ObjectOutputStream.writeFatalException(ObjectOutputStream.java:
> 1558)
> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:
> 346)
> at
> com.yumyumlabs.foundation.appengine.util.Filer.save(Filer.java:42)
> at
> com.yumyumlabs.foundation.appengine.util.Filer.save(Filer.java:33)
> at
> com.yumyumlabs.server.recipe.model.UserSegment.saveUsers(UserSegment.java:
> 51)
> at
>
> org.apache.jsp.tasks.create_002duser_002dsegment_jsp._jspService(create_002duser_002dsegment_jsp.java:
> 104)
> at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
> 511)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
> 390)
> 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 org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327)
> at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
> at
>
> org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:
> 213)
> at
> org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:
> 171)
> at
> org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:
> 145)
> at
>
> org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:
> 92)
> at
>
> org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:
> 381)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1157)
> at
> org.machino.servlet.PageTimerFilter.doFilter(PageTimerFilter.java:
> 63)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1157)
> at org.machino.servlet.LoginFilter.doFilter(LoginFilter.java:121)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1157)
> at org.machino.servlet.RedirectFilter.doFilter(RedirectFilter.java:
> 53)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1157)
> at
>
> com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:
> 97)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1157)
> at
>
> com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:
> 35)
> 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
> 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.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:
> 249)
> 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
> $RequestHandler.headerComplete(HttpConnection.java:923)
> at
>
> com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:
> 76)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at
>
> com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:
> 135)
> at
> com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:
> 262)
> at com.google.apphosting.base.RuntimePb$EvaluationRuntime
> $2.handleRequest(RuntimePb.java:9819)
> at com.google.net.rpc.impl.RpcUtil.handleRequest(RpcUtil.java:445)
> at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:
> 414)
> at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:
> 579)
> at com.google.tracing.TraceContext$TraceContextRunnable
> $1.run(TraceContext.java:454)
> at com.google.tracing.TraceContext.runInContext(TraceContext.java:
> 694)
> at com.google.tracing.TraceContext
>
> $AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:
> 332)
> at com.google.tracing.TraceContext
> $AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:
> 324)
> at com.google.tracing.TraceContext
> $TraceContextRunnable.run(TraceContext.java:452)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:
> 1110)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:636)
> Caused by: com.google.apphosting.api.ApiProxy$ApplicationException:
> ApplicationError: 10: Unknown
> at com.google.apphosting.runtime.ApiProxyImpl
> $AsyncApiFuture.rpcFinished(ApiProxyImpl.java:474)
> at com.google.net.rpc.RpcStub$RpcCallbackDispatcher
> $1.runInContext(RpcStub.java:1050)
> at com.google.tracing.TraceContext$TraceContextRunnable
> $1.run(TraceContext.java:454)
> at com.google.tracing.TraceContext.runInContext(TraceContext.java:
> 694)
> at com.google.tracing.TraceContext
>
> $AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:
> 332)
> at com.google.tracing.TraceContext
> $AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:
> 324)
> at com.google.tracing.TraceContext
> $TraceContextRunnable.run(TraceContext.java:452)
> at com.google.net.rpc.RpcStub
> $RpcCallbackDispatcher.rpcFinished(RpcStub.java:1071)
> at com.google.net.rpc.RPC.internalFinish(RPC.java:2240)
> at
> com.google.net.rpc.impl.RpcNetChannel.finishRpc(RpcNetChannel.java:
> 2338)
> at
> com.google.net.rpc.impl.RpcNetChannel.messageReceived(RpcNetChannel.java:
> 1267)
> at
> com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:
> 328)
> at
> com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:
> 299)
> at com.google.net.async.Connection.handleReadEvent(Connection.java:
> 474)
> at
>
> com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:
> 856)
> at
> com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:
> 222)
> at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:
> 116)
> at com.google.net.async.GlobalEventRegistry
> $2.runLoop(GlobalEventRegistry.java:95)
> at com.google.net.async.LoopingEventDispatcher
> $EventDispatcherThread.run(LoopingEventDispatcher.java:385)
>
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