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我有一个（基于检票口的）网络应用程序，它有一个自动刷新面板（它每 5 秒刷新一次）。我的数据存储区写入操作计数每小时增加约 5%（即约 2500 次操作/小时）。但是 Appstat 仅显示 datastore_v3.RunQuery 操作，这是预期的行为。这些写操作从何而来？

为了调查此问题，我从应用程序设置中禁用了数据存储写入。我开始在日志中收到以下警告：

2013-01-31 10:17:53.672
/wicket/
com.google.apphosting.api.ApiProxy$CapabilityDisabledException: The API call datastore_v3.Put() is temporarily unavailable: Datastore writes have been disabled by an application administrator. Writes can be re-enabled in the admin console.
    at com.google.apphosting.runtime.ApiProxyImpl$AsyncApiFuture.success(ApiProxyImpl.java:487)
    at com.google.apphosting.runtime.ApiProxyImpl$AsyncApiFuture.success(ApiProxyImpl.java:392)
    at com.google.net.rpc3.client.RpcStub$RpcCallbackDispatcher$1.runInContext(RpcStub.java:781)
    at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
    at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
    at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
    at com.google.net.rpc3.client.RpcStub$RpcCallbackDispatcher.rpcFinished(RpcStub.java:823)
    at com.google.net.rpc3.client.RpcStub$RpcCallbackDispatcher.success(RpcStub.java:808)
    at com.google.net.rpc3.impl.client.RpcClientInternalContext.runCallbacks(RpcClientInternalContext.java:898)
    at com.google.net.rpc3.impl.client.RpcClientInternalContext.finishRpcAndNotifyApp(RpcClientInternalContext.java:803)
    at com.google.net.rpc3.impl.client.RpcNetChannel.afterFinishingActiveRpc(RpcNetChannel.java:1092)
    at com.google.net.rpc3.impl.client.RpcNetChannel.finishRpc(RpcNetChannel.java:940)
    at com.google.net.rpc3.impl.client.RpcNetChannel.handleResponse(RpcNetChannel.java:2300)
    at com.google.net.rpc3.impl.client.RpcNetChannel.messageReceived(RpcNetChannel.java:2101)
    at com.google.net.rpc3.impl.client.RpcNetChannel.access$2100(RpcNetChannel.java:145)
    at com.google.net.rpc3.impl.client.RpcNetChannel$TransportCallback.receivedMessage(RpcNetChannel.java:3171)
    at com.google.net.rpc3.impl.client.RpcChannelTransportData$TransportCallback.receivedMessage(RpcChannelTransportData.java:614)
    at com.google.net.rpc3.impl.wire.RpcBaseTransport.receivedMessage(RpcBaseTransport.java:417)
    at com.google.apphosting.runtime.udrpc.UdrpcTransport$ClientAdapter.receivedMessage(UdrpcTransport.java:425)
    at com.google.apphosting.runtime.udrpc.UdrpcTransport.dispatchPacket(UdrpcTransport.java:266)
    at com.google.apphosting.runtime.udrpc.UdrpcTransport.readPackets(UdrpcTransport.java:218)
    at com.google.apphosting.runtime.udrpc.UdrpcTransport$1.run(UdrpcTransport.java:82)
    at com.google.net.eventmanager.AbstractFutureTask$Sync.innerRun(AbstractFutureTask.java:260)
    at com.google.net.eventmanager.AbstractFutureTask.run(AbstractFutureTask.java:121)
    at com.google.net.eventmanager.EventManagerImpl.runTask(EventManagerImpl.java:578)
    at com.google.net.eventmanager.EventManagerImpl.internalRunWorkerLoop(EventManagerImpl.java:1002)
    at com.google.net.eventmanager.EventManagerImpl.runWorkerLoop(EventManagerImpl.java:884)
    at com.google.net.eventmanager.WorkerThreadInfo.runWorkerLoop(WorkerThreadInfo.java:136)
    at com.google.net.eventmanager.EventManagerImpl$WorkerThread.run(EventManagerImpl.java:1855)

这是否意味着某些东西正在尝试写操作？如您所见，堆栈中没有来自我的应用程序的类。

更奇怪的是，即使在这段时间（大约一个小时）我禁用了写入操作，我的写入操作配额也增长了 2%！这个怎么可能？

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