azure - 宇宙数据库 : TransportException - A client transport error occurred

Question

当客户端尝试查询 cosmos 时，会看到大量对象引用未设置到对象实例异常。

深入检查后，异常消息包含如下详细信息:

{
   "CPU Load History":{
      "CPU History":"(2021-10-06T19:01:18.6834408Z 82.390), (2021-10-06T19:01:28.5562209Z 89.873), (2021-10-06T19:01:42.1291501Z 93.642), (2021-10-06T19:01:52.6528941Z 90.542), (2021-10-06T19:02:02.7588327Z 90.015), (2021-10-06T19:02:16.2446310Z 91.149)"
   }
}

“IsClientCpuOverloaded”:true

"TransportException":"发生客户端传输错误:请求在等待服务器响应时超时。(时间:2021-10-06T19:03:07.1867280Z，错误代码:ReceiveTimeout [0x0010]

Exception while executing function: ParseData Object reference not set to an instance of an object.{"name":"Typed FeedIterator ReadNextAsync","id":"xxx-xx-xx-x-xxxx","caller info":{"member":"OperationHelperWithRootTraceAsync","file":"ClientContextCore.cs","line":219},"start time":"07:02:25:448","duration in milliseconds":52503.1979,"data":{"Client Configuration":{"Client Created Time Utc":"2021-10-06T18:14:08.4529348Z","NumberOfClientsCreated":1,"User Agent":"cosmos-netstandard-sdk/3.19.0|3.19.1|02|X64|Microsoft Windows xx.x.xxxx|.NET Core 3.1.18|N|F 00000001|","ConnectionConfig":{"gw":"(cps:50, urto:10, p:False, httpf: False)","rntbd":"(cto: 5, icto: -1, mrpc: 30, mcpe: 65535, erd: False, pr: ReuseUnicastPort)","other":"(ed:False, be:True)"},"ConsistencyConfig":"(consistency: NotSet, prgns:[])"}},"children":[{"name":"MoveNextAsync","id":"xxxx-xx-x-fs-xxxx","caller info":{"member":"MoveNextAsync","file":"CrossPartitionRangePageAsyncEnumerator.cs","line":113}

{"ResponseTimeUTC":"2021-10-06T19:03:07.1875054Z","ResourceType":"Document","OperationType":"Query","LocationEndpoint":"xxxx.azure.com","StoreResult":{"ActivityId":"xxxx-xx-xx-x-xx","StatusCode":"Gone","SubStatusCode":"Unknown","LSN":-1,"PartitionKeyRangeId":null,"GlobalCommittedLSN":-1,"ItemLSN":-1,"UsingLocalLSN":true,"QuorumAckedLSN":-1,"SessionToken":null,"CurrentWriteQuorum":-1,"CurrentReplicaSetSize":-1,"NumberOfReadRegions":-1,"IsClientCpuOverloaded":true,"IsValid":false,"StorePhysicalAddress":xxxxx/","RequestCharge":0,"BELatencyInMs":null,"TransportException":"A client transport error occurred: The request timed out while waiting for a server response. (Time: 2021-10-06T19:03:07.1867280Z, activity ID: xxx-xx-x-xx-xx, error code: ReceiveTimeout [0x0010], base error: HRESULT 0x80131500, URI: xxxx/, connection: xx.xx.xx.xx:63676 -> xx.xx.xx.xxx:14190, payload sent: True, CPU history: (2021-10-06T18:25:38.6098171Z 100.000), (2021-10-06T18:25:53.9808590Z 95.716), (2021-10-06T18:25:58.9272146Z 59.098), (2021-10-06T18:26:15.3087856Z 91.388), (2021-10-06T18:26:18.6269463Z 96.000), (2021-10-06T18:26:28.8584330Z 85.611), CPU count: 4)

Answer 1

这是 3.20.0 中修复的错误: https://learn.microsoft.com/en-us/azure/cosmos-db/sql/sql-api-sdk-dotnet-standard#-3200---2021-06-21

请更新到最新的 SDK 版本以避免出现这种情况。

话虽如此，这是在服务不可用错误期间发生的，请按照 https://learn.microsoft.com/en-us/azure/cosmos-db/troubleshoot-service-unavailable

从您的详细信息来看，CPU 似乎很热，您可能会遇到线程匮乏的情况:https://learn.microsoft.com/en-us/azure/cosmos-db/sql/troubleshoot-dot-net-sdk-request-timeout#high-cpu-utilization

您的 CPU 快照显示了两个问题: