Jaeger FOLLOWS_FROM Issue

index.js

const opentracing = require('opentracing')
const { initTracer } = require('jaeger-client')

const tracer = initTracer({
  serviceName: 'test',
  reporter: {
    logSpans: true,
    flushIntervalMs: 10
  }
})

const spanA = tracer.startSpan('spanA', {
  tags: {[opentracing.Tags.SAMPLING_PRIORITY]: 1}
})

const spanB = tracer.startSpan('spanB', {
  tags: {[opentracing.Tags.SAMPLING_PRIORITY]: 1},
  references: [opentracing.followsFrom(spanA.context())]
})

spanA.finish()
spanB.finish()

trace.json

{
    "data": [
        {
            "traceID": "c8a6ee744774398c",
            "spans": [
                {
                    "traceID": "c8a6ee744774398c",
                    "spanID": "c8a6ee744774398c",
                    "flags": 3,
                    "operationName": "spanA",
                    "references": [],
                    "startTime": 1528226417451000,
                    "duration": 1000,
                    "tags": [],
                    "logs": [],
                    "processID": "p1",
                    "warnings": null
                },
                {
                    "traceID": "c8a6ee744774398c",
                    "spanID": "bc70e13373f73bf6",
                    "flags": 3,
                    "operationName": "spanB",
                    "references": [
                        {
                            "refType": "CHILD_OF",
                            "traceID": "c8a6ee744774398c",
                            "spanID": "c8a6ee744774398c"
                        },
                        {
                            "refType": "FOLLOWS_FROM",
                            "traceID": "c8a6ee744774398c",
                            "spanID": "c8a6ee744774398c"
                        }
                    ],
                    "startTime": 1528226417452000,
                    "duration": 2000,
                    "tags": [],
                    "logs": [],
                    "processID": "p1",
                    "warnings": null
                }
            ],
            "processes": {
                "p1": {
                    "serviceName": "test",
                    "tags": [
                        {
                            "key": "ip",
                            "type": "float64",
                            "value": -1062731434
                        },
                        {
                            "key": "jaeger.hostname",
                            "type": "string",
                            "value": "jackwilarlaptop.home"
                        },
                        {
                            "key": "jaeger.version",
                            "type": "string",
                            "value": "Node-3.9.2dev0"
                        }
                    ]
                }
            },
            "warnings": null
        }
    ],
    "total": 0,
    "limit": 0,
    "offset": 0,
    "errors": null
}