App Engine is currently experiencing a datastore outage:
http://groups.google.com/group/google-appengine-downtime-notify/browse_thread/thread/5d8ce30efa259cce

Things are improving now, but we're still seeing some high latency.
Please let us know if you are still seeing issues.

On May 25, 1:20 pm, Jeff Schnitzer <[email protected]> wrote:
> I'm also seeing 500 errors.  My logs are full of this:
>
> com.google.apphosting.api.ApiProxy$CapabilityDisabledException: The
> API call datastore_v3.Put() is temporarily unavailable.
>         at 
> com.google.net.rpc.RpcStub$RpcCallbackDispatcher$1.runInContext(RpcStub.jav 
> a:1025)
>         at 
> com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.jav 
> a:444)
>         at com.google.tracing.TraceContext.runInContext(TraceContext.java:684)
>         at 
> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInherited 
> ContextNoUnref(TraceContext.java:322)
>         at 
> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInherited 
> Context(TraceContext.java:314)
>         at 
> com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java: 
> 442)
>         at 
> com.google.net.rpc.RpcStub$RpcCallbackDispatcher.rpcFinished(RpcStub.java:1 
> 046)
>         at com.google.net.rpc.RPC.internalFinish(RPC.java:2047)
>         at 
> com.google.net.rpc.impl.RpcNetChannel.finishRpc(RpcNetChannel.java:2338)
>         at 
> com.google.net.rpc.impl.RpcNetChannel.messageReceived(RpcNetChannel.java:12 
> 65)
>         at 
> com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319)
>         at 
> com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290)
>         at 
> com.google.net.async.Connection.handleReadEvent(Connection.java:474)
>         at 
> com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.j 
> ava:831)
>         at 
> com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:207)
>         at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:103)
>         at 
> com.google.net.async.GlobalEventRegistry$2.runLoop(GlobalEventRegistry.java 
> :95)
>         at 
> com.google.net.async.LoopingEventDispatcher$EventDispatcherThread.run(Loopi 
> ngEventDispatcher.java:378)
>
> Also, about 30 minutes ago I deployed but ended up with this error msg:
>
> ...
> Will check again in 32 seconds
> Will check again in 64 seconds
> Closing update: new version is ready to start serving.
> Rolling back the update.
> java.io.IOException: Error posting to 
> URL:https://appengine.google.com/api/appversion/startserving?app_id=mobca...
> 409 Conflict
> No transaction is in progress.
>
> Debugging information may be found in
> /private/var/folders/pU/pUOPLRDNG9KrxpuBZ7mFp++++TI/-Tmp-/appengine-deploy5 
> 053223885430039791.log
>
> (app is mobca-st)
> Jeff
>
>
>
> On Tue, May 25, 2010 at 1:15 PM, Jerome <[email protected]> wrote:
> > Yes, same issue as yesterday... customers are screaming... Help! We
> > are strong advocate of AppEngine, but these repeated outages are
> > hurting very bad.
>
> >http://code.google.com/status/appenginesays there is high latency...
> > But I am seeing the Data Store throwing read only mode exceptions
> > right now, when it is not just a 500.
> > If not that, this is this one:
> > A serious problem was encountered with the process that handled this
> > request, causing it to exit. This is likely to cause a new process to
> > be used for the next request to your application. If you see this
> > message frequently, you may be throwing exceptions during the
> > initialization of your application. (Error code 104)
>
> > Please let us know what we should expect such as we can communicate
> > with our customers which are dead in the water with our service right
> > now!
>
> > Jerome
>
> > On May 25, 9:46 pm, Jesse K <[email protected]> wrote:
> >> App Engine just went down again -- seems the same as what was reported
> >> yesterday in this thread: can't access apps, can't access admin
> >> dashboard.
>
> >> App Engine Team, please get this under control!
>
> >> On May 24, 6:54 pm, Sanjay <[email protected]> wrote:
>
> >> > Seems like a more general issue, my tasks are stuck as well, and this
> >> > is reflected in the task queue dashboard as well:
>
> >> >http://code.google.com/status/appengine/detail/taskqueue/2010/05/24#a...
>
> >> > On May 24, 6:52 pm, Harlan Crystal <[email protected]> wrote:
>
> >> > > Things look *very wrong* on my apps.  For 2/3 of my most important
> >> > > applications, 0 tasks are  being run in the last minute.
>
> >> > > Help!  I have no idea how to resolve this problem on my own.
>
> >> > > -harlan
>
> >> > > On Mon, May 24, 2010 at 9:35 PM, Wesley C (Google) 
> >> > > <[email protected]> wrote:
>
> >> > > > we've had high datastore latencies the past hour or so, but things
> >> > > > seem to be getting back to normal now as i was able to apps and
> >> > > > dashboards with no 500s. let us know if this isn't the case.
>
> >> > > > -- wesley
> >> > > > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> >> > > > "Core Python Programming", Prentice Hall, (c)2007,2001
> >> > > > "Python Fundamentals", Prentice Hall, (c)2009
> >> > > >   http://corepythonprogramming.com
>
> >> > > > wesley.j.chun :: [email protected]
> >> > > > developer relations :: google app engine
> >> > > > @app_engine :: googleappengine.blogspot.com
>
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