google-cloud-node: Intermittent BigQuery failures

Our system test which validates that we return a PartialFailureError when invalid data is inserted into a table.

The schema states that the name property must be a string.

Our request body looks like this:

{
  "rows": [
    {
      "json": {
        "name": "dave"
      }
    },
    {
      "json": {
        "name": 11
      }
    }
  ]
}

The response is either:

// incorrect (frequent)
{
  kind: 'bigquery#tableDataInsertAllResponse'
}

// correct (infrequent)
{
  "kind": "bigquery#tableDataInsertAllResponse",
  "insertErrors": [
    {
      "index": 1,
      "errors": [
        {
          "reason": "invalid",
          "location": "name",
          "debugInfo": "generic::invalid_argument: Conversion from int64 to string is unsupported.",
          "message": "Conversion from int64 to string is unsupported."
        }
      ]
    },
    {
      "index": 0,
      "errors": [
        {
          "reason": "stopped"
        }
      ]
    }
  ]
}

The first I noticed this error was Friday, 3/3/17.

@tswast any ideas? Thanks!