【发布时间】：2013-08-09 04:32:23
【问题描述】：
我正在尝试使用远程 API 将旧 Blob 从 Blobstore 迁移到可能存储，以避免令人讨厌的超时。但是每次我关闭GcsOutputChannel 时，我都会被ApplicationError: 10 卡住——最终没有上传文件。
我的代码：
//using the deprecated API to read the BlobStore:
FileService fileService = FileServiceFactory.getFileService();
AppEngineFile blobFile = fileService.getBlobFile(new BlobKey("myBlobKeyReadFromDatastore"));
FileReadChannel readChannel = fileService.openReadChannel(blobFile, false);
InputStream is = Channels.newInputStream(readChannel);
//now using the brand new API to write to the GCS:
GcsService gcsService = GcsServiceFactory.createGcsService();
GcsFilename filename = new GcsFilename("MyBucket", "theNameOfTheFileReadFromDatastore");
GcsFileOptions options = new GcsFileOptions.Builder().mimeType("theMimeTypeReadFromDatastore").build();
GcsOutputChannel writeChannel = gcsService.createOrReplace(filename, options);
OutputStream os = Channels.newOutputStream(writeChannel);
//and some reading -> writing...
byte[] buff = new byte[1024 * 1024];
int read = 0;
while ((read = is.read(buff)) >= 0){
os.write(buff, 0, read);
}
writeChannel.close(); //<-- Exception here!
readChannel.close();
堆栈跟踪：
com.google.appengine.tools.cloudstorage.RetriesExhaustedException: RetryHelper(13.39 s, 6 attempts, com.google.appengine.tools.cloudstorage.GcsOutputChannelImpl$1@ddbef51): Too many failures, giving up
com.google.appengine.tools.cloudstorage.RetriesExhaustedException: RetryHelper(13.39 s, 6 attempts, com.google.appengine.tools.cloudstorage.GcsOutputChannelImpl$1@ddbef51): Too many failures, giving up
at com.google.appengine.tools.cloudstorage.RetryHelper.doRetry(RetryHelper.java:115)
at com.google.appengine.tools.cloudstorage.RetryHelper.runWithRetries(RetryHelper.java:138)
at com.google.appengine.tools.cloudstorage.GcsOutputChannelImpl.close(GcsOutputChannelImpl.java:140)
Caused by: java.io.IOException
at com.google.appengine.api.files.FileServiceImpl.translateException(FileServiceImpl.java:620)
at com.google.appengine.api.files.FileServiceImpl.makeSyncCall(FileServiceImpl.java:593)
at com.google.appengine.api.files.FileServiceImpl.close(FileServiceImpl.java:564)
at com.google.appengine.api.files.FileServiceImpl.close(FileServiceImpl.java:456)
at com.google.appengine.api.files.FileWriteChannelImpl.close(FileWriteChannelImpl.java:81)
at com.google.appengine.tools.cloudstorage.dev.LocalRawGcsService.append(LocalRawGcsService.java:159)
at com.google.appengine.tools.cloudstorage.dev.LocalRawGcsService.finishObjectCreation(LocalRawGcsService.java:178)
at com.google.appengine.tools.cloudstorage.GcsOutputChannelImpl$1.run(GcsOutputChannelImpl.java:143)
at com.google.appengine.tools.cloudstorage.GcsOutputChannelImpl$1.run(GcsOutputChannelImpl.java:140)
at com.google.appengine.tools.cloudstorage.RetryHelper.doRetry(RetryHelper.java:93)
... 5 more
Caused by: com.google.apphosting.api.ApiProxy$ApplicationException: ApplicationError: 10:
at java.lang.Thread.getStackTrace(Thread.java:1567)
at com.google.apphosting.runtime.ApiProxyImpl.doSyncCall(ApiProxyImpl.java:259)
at com.google.apphosting.runtime.ApiProxyImpl.access$000(ApiProxyImpl.java:68)
at com.google.apphosting.runtime.ApiProxyImpl$1.run(ApiProxyImpl.java:202)
at com.google.apphosting.runtime.ApiProxyImpl$1.run(ApiProxyImpl.java:199)
at java.security.AccessController.doPrivileged(Native Method)
at com.google.apphosting.runtime.ApiProxyImpl.makeSyncCall(ApiProxyImpl.java:199)
at com.google.apphosting.runtime.ApiProxyImpl.makeSyncCall(ApiProxyImpl.java:68)
at com.google.apphosting.api.ApiProxy.makeSyncCall(ApiProxy.java:107)
at com.google.apphosting.api.ApiProxy.makeSyncCall(ApiProxy.java:56)
at com.google.apphosting.utils.remoteapi.RemoteApiServlet.executeRequest(RemoteApiServlet.java:384)
at com.google.apphosting.utils.remoteapi.RemoteApiServlet.doPost(RemoteApiServlet.java:183)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125)
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$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$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:146)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:435)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:442)
at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:186)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:306)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:298)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:439)
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
at java.lang.Thread.run(Thread.java:722)
Caused by: com.google.apphosting.api.ApiProxy$ApplicationException: ApplicationError: 10:
at com.google.apphosting.utils.runtime.ApiProxyUtils.convertApiResponseRpcErrorToException(ApiProxyUtils.java:108)
at com.google.apphosting.utils.runtime.ApiProxyUtils.convertApiError(ApiProxyUtils.java:70)
at com.google.apphosting.runtime.ApiProxyImpl$AsyncApiFuture.success(ApiProxyImpl.java:493)
at com.google.apphosting.runtime.ApiProxyImpl$AsyncApiFuture.success(ApiProxyImpl.java:411)
at com.google.net.rpc3.client.RpcStub$RpcCallbackDispatcher$1.runInContext(RpcStub.java:811)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:442)
at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:186)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:306)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:298)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:439)
at com.google.net.rpc3.client.RpcStub$RpcCallbackDispatcher.runCallback(RpcStub.java:849)
at com.google.net.rpc3.client.RpcStub$RpcCallbackDispatcher.rpcFinished(RpcStub.java:859)
at com.google.net.rpc3.client.RpcStub$RpcCallbackDispatcher.success(RpcStub.java:838)
at com.google.net.rpc3.impl.client.RpcClientInternalContext.runCallbacks(RpcClientInternalContext.java:984)
at com.google.net.rpc3.impl.client.RpcClientInternalContext.finishRpcAndNotifyApp(RpcClientInternalContext.java:889)
at com.google.net.rpc3.impl.client.RpcNetChannel.afterFinishingActiveRpc(RpcNetChannel.java:1291)
at com.google.net.rpc3.impl.client.RpcNetChannel.finishRpc(RpcNetChannel.java:1124)
at com.google.net.rpc3.impl.client.RpcNetChannel.handleResponse(RpcNetChannel.java:2690)
at com.google.net.rpc3.impl.client.RpcNetChannel.messageReceived(RpcNetChannel.java:2433)
at com.google.net.rpc3.impl.client.RpcNetChannel.access$2300(RpcNetChannel.java:159)
at com.google.net.rpc3.impl.client.RpcNetChannel$TransportCallback.receivedMessage(RpcNetChannel.java:3605)
at com.google.net.rpc3.impl.client.RpcChannelTransportData$TransportCallback.receivedMessage(RpcChannelTransportData.java:640)
at com.google.net.rpc3.impl.wire.RpcBaseTransport.receivedMessage(RpcBaseTransport.java:444)
at com.google.apphosting.runtime.udrpc.UdrpcTransport$ClientAdapter.receivedMessage(UdrpcTransport.java:567)
at com.google.apphosting.runtime.udrpc.UdrpcTransport.dispatchPacket(UdrpcTransport.java:386)
at com.google.apphosting.runtime.udrpc.UdrpcTransport.access$500(UdrpcTransport.java:63)
at com.google.apphosting.runtime.udrpc.UdrpcTransport$5.run(UdrpcTransport.java:286)
at com.google.net.eventmanager.AbstractFutureTask$Sync.innerRun(AbstractFutureTask.java:260)
at com.google.net.eventmanager.AbstractFutureTask.run(AbstractFutureTask.java:121)
at com.google.net.eventmanager.EventManagerImpl.runTask(EventManagerImpl.java:579)
at com.google.net.eventmanager.EventManagerImpl.internalRunWorkerLoop(EventManagerImpl.java:994)
at com.google.net.eventmanager.EventManagerImpl.runWorkerLoop(EventManagerImpl.java:876)
at com.google.net.eventmanager.WorkerThreadInfo.runWorkerLoop(WorkerThreadInfo.java:160)
at com.google.net.eventmanager.EventManagerImpl$WorkerThread.run(EventManagerImpl.java:1849)
即使文件大小小于 1KB，也会出现此错误。我的 Google Cloud Storage 配置为用户 <my-app-id>@appspot.gserviceaccount.com 作为存储桶的所有者，并在项目中作为“可以编辑”。结算功能也已启用（在 App Engine 和 Google Cloud Console 中）。我正在使用 App Engine SDK 1.8.3。
我不知道该怎么办。有什么想法吗？
【问题讨论】：
标签： java google-app-engine google-cloud-storage