Issues polling glucose from Share

[loudnate]

@channemann and @eyim are having intermittent issues with glucose updating from Share.

Asking them to debug invocations of private func backfillGlucoseFromShareIfNeeded(). If the issue isn't immediately reproducible, additional remote logging calls can be added.

[loudnate]

Looks like @channmann is seeing DataError. We need to augment ShareClient to find out what the core issue is.

mddub/dexcom-share-client-swift#3

[channemann]

Situation:

• Was playing softball, left phone, receiver, and RL on sideline, drifted in and out of range starting around 11 am
• Receiver (and share app) show periodic glucose readings received between 11 am and 12:35 pm, at which point I was back in range and getting consistent readings
• Loop app has reservoir data until 11:05 am, then picks back up at 12:30 (and has reservoir data every 5 minutes after that)
• Loop app stops showing glucose data after11:04 am
• Error from mLab:

{
    "_id": {
        "$oid": "57532eb2c2ef1612e2a11d6e"
    },
    "source": "ShareClient",
    "message": "DataError(\"Failed to decode SGVs as array: {\\\"Code\\\":\\\"SessionNotValid\\\",\\\"Message\\\":\\\"Error in the application.\\\",\\\"SubCode\\\":\\\"<OnlineException DateThrownLocal=\\\\\\\"2016-06-04 12:40:33.7290426-07:00\\\\\\\" DateThrown=\\\\\\\"2016-06-04 19:40:33.7290426+00:00\\\\\\\" ErrorCode=\\\\\\\"\\\\\\\" Type=\\\\\\\"6\\\\\\\" Category=\\\\\\\"5\\\\\\\" Severity=\\\\\\\"1\\\\\\\" TypeString=\\\\\\\"SessionNotValid\\\\\\\" CategoryString=\\\\\\\"Logical\\\\\\\" SeverityString=\\\\\\\"Minor\\\\\\\" HostName=\\\\\\\"\\\\\\\" HostIP=\\\\\\\"\\\\\\\" Id=\\\\\\\"{C6EFDB18-A1D8-46D7-97F4-39D82F1B3E41}\\\\\\\" Message=\\\\\\\"Error in the application.\\\\\\\" FullText=\\\\\\\"Dexcom.Common.OnlineException: Error in the application.\\\\\\\" \\\\/>\\\",\\\"TypeName\\\":\\\"FaultException\\\"}\")",
    "reportedAt": "2016-06-04T12:40:33-0700"
}

That's one of several, from 12:30 am every five minutes. There are also associated errors with PredictGlucose, such as:

{
    "_id": {
        "$oid": "57532ec1bd966f1469bd90b0"
    },
    "source": "PredictGlucose",
    "message": "StaleDataError(\"Glucose Date: 2016-06-04 18:04:04 +0000 or Pump status date: 2016-06-04 19:40:00 +0000 older than 15.0 min\")",
    "reportedAt": "2016-06-04T12:40:49-0700"
}

Subsequently killed and restarted app at 12:53 pm. Loop ran successfully at 12:55 pm, and everything returned to normal.

cc @mddub

[loudnate]

Can you open a new ticket here: https://github.com/mddub/dexcom-share-client-swift/issues? It looks like we need to detect and renew session expiry.

[mddub]

Give v0.1.2 of https://github.com/mddub/dexcom-share-client-swift a try, let's see if that fixes it.