azure - 在控制台中运行 webjob 可以工作，但在 Azure 上抛出异常 : The remote name could not be resolved: 'xxx.queue.core.windows.net'

Question

我的网络作业从我的 Blob 存储中删除文档。如果我将代码复制到控制台应用程序并运行它，它将运行完成而不会出现错误。如果我在 Visual Studio 中创建一个新的 WebJob(右键单击我的网站项目并选择“添加”->“新建 Azure WebJob 项目”)，将代码复制到 Functions.cs 并部署，Azure 在运行 WebJob 时会引发异常:

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[09/09/2016 01:51:44 > fc93a9: ERR ] Unhandled Exception: Microsoft.WindowsAzure.Storage.StorageException: The remote name could not be resolved: 'xxx.queue.core.windows.net' ---> System.Net.WebException: The remote name could not be resolved: 'xxx.queue.core.windows.net'
[09/09/2016 01:51:44 > fc93a9: ERR ]    at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at Microsoft.WindowsAzure.Storage.Core.Executor.Executor.EndGetResponse[T](IAsyncResult getResponseResult)
[09/09/2016 01:51:44 > fc93a9: ERR ]    --- End of inner exception stack trace ---
[09/09/2016 01:51:44 > fc93a9: ERR ]    at Microsoft.WindowsAzure.Storage.Core.Executor.Executor.EndExecuteAsync[T](IAsyncResult result)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at Microsoft.WindowsAzure.Storage.Queue.CloudQueue.EndExists(IAsyncResult asyncResult)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at Microsoft.WindowsAzure.Storage.Core.Util.AsyncExtensions.<>c__DisplayClass1`1.<CreateCallback>b__0(IAsyncResult ar)
[09/09/2016 01:51:44 > fc93a9: ERR ] --- End of stack trace from previous location where exception was thrown ---
[09/09/2016 01:51:44 > fc93a9: ERR ]    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at Microsoft.Azure.WebJobs.Host.Queues.Listeners.QueueListener.<ExecuteAsync>d__4.MoveNext()
[09/09/2016 01:51:44 > fc93a9: ERR ] --- End of stack trace from previous location where exception was thrown ---
[09/09/2016 01:51:44 > fc93a9: ERR ]    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at Microsoft.Azure.WebJobs.Host.Timers.TaskSeriesTimer.<RunAsync>d__d.MoveNext()
[09/09/2016 01:51:44 > fc93a9: ERR ] --- End of stack trace from previous location where exception was thrown ---
[09/09/2016 01:51:44 > fc93a9: ERR ]    at Microsoft.Azure.WebJobs.Host.Timers.BackgroundExceptionDispatcher.<>c__DisplayClass1.<Throw>b__0()
[09/09/2016 01:51:44 > fc93a9: ERR ]    at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
[09/09/2016 01:51:44 > fc93a9: ERR ]    at System.Threading.ThreadHelper.ThreadStart()
[09/09/2016 01:51:44 > fc93a9: SYS ERR ] Job failed due to exit code -532462766

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我没有队列，所以这可能是错误的来源，但奇怪的是我没有尝试访问队列，我只是访问我的 blob 存储。

不确定这是否有帮助，但我的 webjobs Program.cs 看起来像这样:

    static void Main()
    {
        JobHostConfiguration config = new JobHostConfiguration();
        config.Tracing.ConsoleLevel = TraceLevel.Verbose;

        config.UseTimers();

        var host = new JobHost(config);
        // The following code ensures that the WebJob will be running continuously
        host.RunAndBlock();
    }

这是作业中唯一使用存储的代码，其余的都是用于获取列表等的数据库内容。

CloudStorageAccount storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("StorageConnectionString"));

// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference("agentdocuments");

foreach (var doc in expiredDocs)
{
    if (doc.ContentLength == 1)
    {
        // Retrieve reference to blob
        CloudBlockBlob blockBlob = container.GetBlockBlobReference($"{doc.SubDomain.ToLower()}/{doc.ClientId}/{doc.FileId}");

        await blockBlob.DeleteIfExistsAsync();
    }
}

编辑:我还应该补充一点，这仅在更新后才开始发生:

• Microsoft.Azure.WebJobs 从 1.1.1 到 1.1.2
• Microsoft.Azure.WebJobs.Core 从 1.1.1 到 1.1.2
• WindowsAzure.Storage 从 5.0.2 到 7.2.0 以及

还有一些代码更改和其他更新(例如 Newtonsoft.Json、Microsoft.WindowsAzure.ConfigurationManager、Microsoft.Web.WebJobs.Publish)，但我访问 blob 的方式没有发生任何代码更改。

更新 - 我的网络作业在周末运行完成。它在 22:23 失败，并出现与上面相同的错误，但随后在 22:24 重试时成功运行。但今天又失败了，出现同样的错误。我将尝试删除 @FleminAdambukulam 所说的日志记录，但奇怪的是它在没有任何代码更改的情况下运行，但随后再次失败......

Answer 1

问题在于存储帐户是仅支持 Blob 的特殊类型。即使您没有使用队列，WebJobs SDK 也会在内部依赖它们。因此，为了使用 WebJobs SDK，您需要使用常规存储帐户。