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我正在使用Google Cloud Storage Java API从Google App Engine应用程序读取存储在Google Cloud Storage存储区中的zip文件。 它适用于小文件，但是当我尝试读取我需要的实际文件时（25Mb压缩），我得到一个ApplicationError：10异常。测试完成在GAE上部署的应用程序。ApplicationError：10使用Google Cloud Storage Java API读取大型zip文件
我可能已经明白ApplicationError：10在文件打开时间太长（+30s以上）时抛出，请参阅：https://groups.google.com/forum/?fromgroups#!topic/google-appengine-java/5XBVaVDKvvs，但我仍然在努力让这件事情奏效。
感谢您的帮助。
还有就是我所采用的测试代码：
FileService fileService = FileServiceFactory.getFileService();
AppEngineFile readableFile = new AppEngineFile("/gs/xxxx-my-bucket/xxx-bigfile.zip");
FileReadChannel readChannel = fileService.openReadChannel(readableFile, false);
ZipInputStream zis = new ZipInputStream(Channels.newInputStream(readChannel));
ZipEntry ze = null;
while ((ze = zis.getNextEntry()) != null) {
resp.getOutputStream().println("Unzipping " + ze.getName());
for (int c = zis.read(); c != -1; c = zis.read()) {
resp.getOutputStream().print((char) c);
}
zis.closeEntry();
}
zis.close();
我得到的堆栈跟踪是：
java.io.IOException
at com.google.appengine.api.files.FileServiceImpl.translateException(FileServiceImpl.java:617)
at com.google.appengine.api.files.FileServiceImpl.makeSyncCall(FileServiceImpl.java:590)
at com.google.appengine.api.files.FileServiceImpl.read(FileServiceImpl.java:539)
at com.google.appengine.api.files.FileServiceImpl.read(FileServiceImpl.java:410)
at com.google.appengine.api.files.FileReadChannelImpl.read(FileReadChannelImpl.java:73)
at sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:65)
at sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:109)
at sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:103)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
at java.io.FilterInputStream.read(FilterInputStream.java:133)
at java.io.PushbackInputStream.read(PushbackInputStream.java:186)
at java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:238)
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
at java.util.zip.ZipInputStream.read(ZipInputStream.java:163)
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:122)
at fr.heliorama.skylinewebapp.servlets.TestGSZip.doGet(TestGSZip.java:30)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
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$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:102)
at org.mortbay.jetty.servlet.ServletHandler$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$RequestHandler.headerComplete(HttpConnection.java:923)
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:135)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:477)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:449)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:455)
at com.google.tracing.TraceContext.runInContext(TraceContext.java:695)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:333)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:325)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:453)
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
at java.lang.Thread.run(Thread.java:679)
Caused by: com.google.apphosting.api.ApiProxy$ApplicationException: ApplicationError: 10:
at java.lang.Thread.getStackTrace(Thread.java:1495)
at com.google.apphosting.runtime.ApiProxyImpl.doSyncCall(ApiProxyImpl.java:237)
at com.google.apphosting.runtime.ApiProxyImpl.access$000(ApiProxyImpl.java:68)
at com.google.apphosting.runtime.ApiProxyImpl$1.run(ApiProxyImpl.java:182)
at com.google.apphosting.runtime.ApiProxyImpl$1.run(ApiProxyImpl.java:180)
at java.security.AccessController.doPrivileged(Native Method)
at com.google.apphosting.runtime.ApiProxyImpl.makeSyncCall(ApiProxyImpl.java:180)
at com.google.apphosting.runtime.ApiProxyImpl.makeSyncCall(ApiProxyImpl.java:68)
at com.google.apphosting.api.ApiProxy.makeSyncCall(ApiProxy.java:101)
at com.google.apphosting.api.ApiProxy.makeSyncCall(ApiProxy.java:50)
at com.google.appengine.api.files.FileServiceImpl.makeSyncCall(FileServiceImpl.java:586)
... 48 more
Caused by: com.google.apphosting.api.ApiProxy$ApplicationException: ApplicationError: 10:
at com.google.apphosting.runtime.ApiProxyImpl$AsyncApiFuture.failure(ApiProxyImpl.java:546)
at com.google.net.rpc3.client.RpcStub$RpcCallbackDispatcher$1.runInContext(RpcStub.java:784)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:455)
at com.google.tracing.TraceContext.runInContext(TraceContext.java:695)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:333)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:325)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:453)
at com.google.net.rpc3.client.RpcStub$RpcCallbackDispatcher.rpcFinished(RpcStub.java:824)
at com.google.net.rpc3.client.RpcStub$RpcCallbackDispatcher.failure(RpcStub.java:815)
at com.google.net.rpc3.impl.client.RpcClientInternalContext.runCallbacks(RpcClientInternalContext.java:895)
at com.google.net.rpc3.impl.client.RpcClientInternalContext.finishRpcAndNotifyApp(RpcClientInternalContext.java:798)
at com.google.net.rpc3.impl.client.RpcNetChannel.afterFinishingActiveRpc(RpcNetChannel.java:1054)
at com.google.net.rpc3.impl.client.RpcNetChannel.finishRpc(RpcNetChannel.java:902)
at com.google.net.rpc3.impl.client.RpcNetChannel.handleResponse(RpcNetChannel.java:2250)
at com.google.net.rpc3.impl.client.RpcNetChannel.messageReceived(RpcNetChannel.java:2057)
at com.google.net.rpc3.impl.client.RpcNetChannel.access$2000(RpcNetChannel.java:143)
at com.google.net.rpc3.impl.client.RpcNetChannel$TransportCallback.receivedMessage(RpcNetChannel.java:3112)
at com.google.net.rpc3.impl.client.RpcChannelTransportData$TransportCallback.receivedMessage(RpcChannelTransportData.java:599)
at com.google.net.rpc3.impl.wire.RpcBaseTransport.receivedMessage(RpcBaseTransport.java:417)
at com.google.net.rpc3.impl.wire.RpcClientTcpTransport.parseOneMessage(RpcClientTcpTransport.java:750)
at com.google.net.rpc3.impl.wire.RpcClientTcpTransport.parseMessages(RpcClientTcpTransport.java:634)
at com.google.net.rpc3.impl.wire.RpcClientTcpTransport.access$100(RpcClientTcpTransport.java:37)
at com.google.net.rpc3.impl.wire.RpcClientTcpTransport$1.dataReceived(RpcClientTcpTransport.java:295)
at com.google.net.async3.SocketConnection.handleNetworkReadEvent(SocketConnection.java:900)
at com.google.net.async3.SocketConnection.access$400(SocketConnection.java:43)
at com.google.net.async3.SocketConnection$NetworkReadHandlerImpl.run(SocketConnection.java:929)
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:575)
at com.google.net.eventmanager.EventManagerImpl.internalRunWorkerLoop(EventManagerImpl.java:999)
at com.google.net.eventmanager.EventManagerImpl.runWorkerLoop(EventManagerImpl.java:881)
at com.google.net.eventmanager.WorkerThreadInfo.runWorkerLoop(WorkerThreadInf...(length 8282)
我没有任何出色的想法，但也许你可以尝试下载文件到本地计算机，而不用解压缩它。然后您可以解压缩本地副本。也许这将摆脱时间问题，如果这确实是问题，或至少帮助你更好地确定问题实际上是什么。 –
文件是否打开超过30秒？ –
@霍华德：好主意，我会尝试读解压缩的数据，就像二进制流，我们会看看它做了什么。顺便说一句，读者在GAE上，所以我不能把它下载到我的本地计算机上。 –