Events stuck in temp folder

[irriss]

Hi there,

I am using ApplicationInsights-node with iisnode and noticed that some *.ai files stuck in TEMP\appInsights-key folder forever and nothing is written in stderr or stdout.

The last event in *.ai file is always this exception:

{
   "ver":1,
   "sampleRate":100,
   "tags":{
      "ai.application.ver":"0.1.0",
      "ai.device.id":"",
      "ai.cloud.roleInstance":"ns547004",
      "ai.device.osVersion":"Windows_NT 10.0.14393",
      "ai.cloud.role":"Web",
      "ai.device.osArchitecture":"x64",
      "ai.device.osPlatform":"win32",
      "ai.internal.sdkVersion":"node:1.7.2"
   },
   "data":{
      "baseType":"ExceptionData",
      "baseData":{
         "ver":2,
         "exceptions":[
            {
               "hasFullStack":true,
               "parsedStack":[
                  {
                     "sizeInBytes":359,
                     "level":0,
                     "method":"NodeClient.TelemetryClient.trackException",
                     "assembly":"at NodeClient.TelemetryClient.trackException (C:\\inetpub\\wwwroot\\sitename\\node_modules\\applicationinsights\\out\\Library\\TelemetryClient.js:60:35)",
                     "fileName":"C:\\inetpub\\wwwroot\\sitename\\node_modules\\applicationinsights\\out\\Library\\TelemetryClient.js",
                     "line":60
                  },
                  {
                     "sizeInBytes":337,
                     "level":1,
                     "method":"AutoCollectExceptions.handle",
                     "assembly":"at AutoCollectExceptions.handle (C:\\inetpub\\wwwroot\\sitename\\node_modules\\applicationinsights\\out\\AutoCollection\\Exceptions.js:26:35)",
                     "fileName":"C:\\inetpub\\wwwroot\\sitename\\node_modules\\applicationinsights\\out\\AutoCollection\\Exceptions.js",
                     "line":26
                  },
                  {
                     "sizeInBytes":117,
                     "level":2,
                     "method":"process.emit",
                     "assembly":"at process.emit (events.js:198:13)",
                     "fileName":"events.js",
                     "line":198
                  },
                  {
                     "sizeInBytes":261,
                     "level":3,
                     "method":"processEmit [as emit]",
                     "assembly":"at processEmit [as emit] (C:\\inetpub\\wwwroot\\sitename\\node_modules\\signal-exit\\index.js:155:32)",
                     "fileName":"C:\\inetpub\\wwwroot\\sitename\\node_modules\\signal-exit\\index.js",
                     "line":155
                  },
                  {
                     "sizeInBytes":187,
                     "level":4,
                     "method":"emitPromiseRejectionWarnings",
                     "assembly":"at emitPromiseRejectionWarnings (internal/process/promises.js:119:20)",
                     "fileName":"internal/process/promises.js",
                     "line":119
                  },
                  {
                     "sizeInBytes":173,
                     "level":5,
                     "method":"process._tickCallback",
                     "assembly":"at process._tickCallback (internal/process/next_tick.js:69:34)",
                     "fileName":"internal/process/next_tick.js",
                     "line":69
                  }
               ],
               "message":"[object Promise]",
               "typeName":"Error"
            }
         ],
         "properties":{

         },
         "severityLevel":3
      }
   },
   "iKey":"ai-key",
   "name":"Microsoft.ApplicationInsights.aikey.Exception",
   "time":"2020-03-17T02:41:08.238Z"
}

I have a staging environment with exacty the same code and same exception is sent well to another instance of AI (with different key).

Please help figure out what could be the problem.

[irriss]

Actually, this morning I found even more files stuck in that folder. Not all of them contain that exception.

Is there a way to get additional logs/output to figure out why the files were not processed/deleted?

[irriss]

Now I have many errors like this

ApplicationInsights:Sender [ 'Ingestion endpoint could not be reached 55 consecutive times. There may be resulting telemetry loss. Most recent error:',
  { Error: getaddrinfo ENOTFOUND dc.services.visualstudio.com dc.services.visualstudio.com:443
      at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:56:26)
    errno: 'ENOTFOUND',
    code: 'ENOTFOUND',
    syscall: 'getaddrinfo',
    hostname: 'dc.services.visualstudio.com',
    host: 'dc.services.visualstudio.com',
    port: 443 } ]

But only in one instance of IIS app. Another instance has same app code the only difference is AppInsight key and it do not have any issues with sending events.