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我使用该样品 https://github.com/azure-samples/compute-java-manage-virtual-machines-in-parallel天青创建
它正常工作与VM数目5. 但是，指定的虚拟机17或33的数目它失败例外等于数的数目并联多个VM失败未能创建的虚拟机（其中一些已创建）。没有好的错误消息被返回。什么可能是错误？
我得到的日志这样
[RxIoScheduler-22] INFO com.microsoft.azure.management.compute.VirtualMachines createOrUpdate - <-- 409 Conflict https://management.azure.com/subscriptions/.../resourceGroups/rgcoppc3834913a3950/providers/Microsoft.Compute/virtualMachines/VM-19?api-version=2016-04-30-preview (1815 ms, 195-byte body)
[RxIoScheduler-21] INFO com.microsoft.azure.management.compute.VirtualMachines createOrUpdate - <-- 409 Conflict https://management.azure.com/subscriptions/.../resourceGroups/rgcoppc3834913a3950/providers/Microsoft.Compute/virtualMachines/VM-30?api-version=2016-04-30-preview (1893 ms, 195-byte body)
[RxIoScheduler-6] INFO com.microsoft.azure.management.compute.VirtualMachines createOrUpdate - <-- 409 Conflict https://management.azure.com/subscriptions/..../resourceGroups/rgcoppc3834913a3950/providers/Microsoft.Compute/virtualMachines/VM-10?api-version=2016-04-30-preview (2096 ms, 195-byte body)
堆栈跟踪例如（33个虚拟机的，有些不是创建）：
31 exceptions occurred.
rx.exceptions.CompositeException: 31 exceptions occurred.
at rx.internal.operators.OperatorMerge$MergeSubscriber.reportError(OperatorMerge.java:268)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:658)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:568)
at rx.internal.operators.OperatorMerge$InnerSubscriber.onCompleted(OperatorMerge.java:857)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:656)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:568)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onCompleted(OperatorMerge.java:281)
at rx.internal.operators.OperatorMapNotification$MapNotificationSubscriber.tryEmit(OperatorMapNotification.java:155)
at rx.internal.operators.OperatorMapNotification$MapNotificationSubscriber.onCompleted(OperatorMapNotification.java:121)
at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onCompleted(OnSubscribeDoOnEach.java:70)
at rx.internal.operators.OperatorSubscribeOn$1$1.onCompleted(OperatorSubscribeOn.java:68)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:656)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:568)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onCompleted(OperatorMerge.java:281)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onCompleted(OnSubscribeMap.java:97)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:656)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:568)
at rx.internal.operators.OperatorMerge$InnerSubscriber.onCompleted(OperatorMerge.java:857)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onCompleted(OnSubscribeMap.java:97)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onCompleted(OnSubscribeMap.java:97)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:656)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:568)
at rx.internal.operators.OperatorMerge$InnerSubscriber.onCompleted(OperatorMerge.java:857)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onCompleted(OnSubscribeMap.java:97)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:656)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:568)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onCompleted(OperatorMerge.java:281)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onCompleted(OnSubscribeMap.java:97)
at rx.internal.producers.SingleProducer.request(SingleProducer.java:75)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.setProducer(OnSubscribeMap.java:102)
at rx.internal.operators.OperatorSingle$ParentSubscriber.onCompleted(OperatorSingle.java:110)
at rx.internal.operators.OperatorTake$1.onNext(OperatorTake.java:80)
at rx.internal.operators.OnSubscribeFilter$FilterSubscriber.onNext(OnSubscribeFilter.java:76)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitScalar(OperatorMerge.java:395)
at rx.internal.operators.OperatorMerge$MergeSubscriber.tryEmit(OperatorMerge.java:355)
at rx.internal.operators.OperatorMerge$InnerSubscriber.onNext(OperatorMerge.java:846)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitScalar(OperatorMerge.java:511)
at rx.internal.operators.OperatorMerge$MergeSubscriber.tryEmit(OperatorMerge.java:466)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:244)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:148)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:77)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitScalar(OperatorMerge.java:511)
at rx.internal.operators.OperatorMerge$MergeSubscriber.tryEmit(OperatorMerge.java:466)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:244)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:148)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:77)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:173)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.setProducer(OnSubscribeMap.java:102)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138)
at rx.Observable.unsafeSubscribe(Observable.java:10142)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10142)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10142)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:248)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:148)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:77)
at rx.internal.operators.OnSubscribeRedo$2$1.onNext(OnSubscribeRedo.java:244)
at rx.internal.util.ScalarSynchronousObservable$ScalarAsyncProducer.call(ScalarSynchronousObservable.java:200)
at rx.internal.util.ScalarSynchronousObservable$2$1.call(ScalarSynchronousObservable.java:114)
at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:230)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
ComposedException 1 :
com.microsoft.azure.CloudException
at com.microsoft.azure.AzureClient.createExceptionFromResponse(AzureClient.java:591)
at com.microsoft.azure.AzureClient.access$000(AzureClient.java:34)
at com.microsoft.azure.AzureClient$1.call(AzureClient.java:135)
at com.microsoft.azure.AzureClient$1.call(AzureClient.java:132)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:69)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:173)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.setProducer(OnSubscribeMap.java:102)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138)
at rx.Observable.unsafeSubscribe(Observable.java:10142)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10142)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.Observable.unsafeSubscribe(Observable.java:10142)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.Observable.unsafeSubscribe(Observable.java:10142)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:248)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:148)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:77)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:77)
at rx.internal.util.ScalarSynchronousObservable$WeakSingleProducer.request(ScalarSynchronousObservable.java:276)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.setProducer(OnSubscribeMap.java:102)