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我正在尝试使用从 cosmos 集合中读取数据DocumentClient，在尝试读取时，有时会出现以下错误。

代码： 

var Client = new DocumentClient(new Uri(accountUri), accountKey);
var collectionLink = UriFactory.CreateDocumentCollectionUri(database, collection);
var query = Client.CreateDocumentQuery<T1>(collectionLink, feedOptions);
var queryable = query.AsDocumentQuery();
var list = new List<T>();
while (queryable.HasMoreResults){
    // note that ExecuteNextAsync can return many records in each call
    var response = await queryable.ExecuteNextAsync<T>();
    list.AddRange(response);
}
return list.FirstOrDefault();

错误：

无法从传输连接读取数据：操作已取消。操作已取消

我尝试了一些与此错误相关的线程，但这没有帮助。

堆栈跟踪：

Exception: at System.Net.Http.HttpConnection.SendAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken) 
at System.Net.Http.HttpConnectionPool.SendWithNtConnectionAuthAsync(HttpConnection connection, HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken) 
at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken) 
at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) at Microsoft.Azure.Documents.Client.DocumentClient.HttpRequestMessageHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) 
at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts) at Microsoft.Azure.Documents.GatewayStoreModel.<>c__DisplayClass20_0.<<InvokeAsync>b__0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- 
at Microsoft.Azure.Documents.BackoffRetryUtility`1.<>c__DisplayClass1_0.<<ExecuteAsync>b__0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- 
at Microsoft.Azure.Documents.BackoffRetryUtility`1.ExecuteRetryAsync(Func`1 callbackMethod, Func`3 callShouldRetry, Func`1 inBackoffAlternateCallbackMethod, TimeSpan minBackoffForInBackoffCallback, CancellationToken cancellationToken, Action`1 preRetryCallback) at Microsoft.Azure.Documents.ShouldRetryResult.ThrowIfDoneTrying(ExceptionDispatchInfo capturedException) 
at Microsoft.Azure.Documents.BackoffRetryUtility`1.ExecuteRetryAsync(Func`1 callbackMethod, Func`3 callShouldRetry, Func`1 inBackoffAlternateCallbackMethod, TimeSpan minBackoffForInBackoffCallback, CancellationToken cancellationToken, Action`1 preRetryCallback) 
at Microsoft.Azure.Documents.BackoffRetryUtility`1.ExecuteAsync(Func`1 callbackMethod, IRetryPolicy retryPolicy, CancellationToken cancellationToken, Action`1 preRetryCallback) at Microsoft.Azure.Documents.GatewayStoreModel.InvokeAsync(DocumentServiceRequest request, ResourceType resourceType, CancellationToken cancellationToken) 
at Microsoft.Azure.Documents.GatewayStoreModel.ProcessMessageAsync(DocumentServiceRequest request, CancellationToken cancellationToken) 
at Microsoft.Azure.Documents.Client.DocumentClient.ExecuteQueryAsync(DocumentServiceRequest request, CancellationToken cancellationToken)

注意：该集合可能会被频繁且并行地访问。

请帮我解决这个错误。

提前致谢。

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0 回答 0