All DCF logs (with collector and connector logs) for a particular management pack will be found in below location:

<DCF Install directory>/Collector-Manager/smarts-metrics-collect/logs/collecting-0-0.log

<DCF Install directory>/Collector-Manager/smarts-metrics-collect/logs/file-collector.txt

Sample JSON format outputs to Kafka are below:

Sample 1:
{
	"groupName": "group",
	"discoveryID": null,
	"jobID": "9999",
	"type": "Interface",
	"timestamp": 1551955631,
	"value": 0.0,
	"action": "r",
	"properties": {
		"ismanaged": "true",
		"source": "INCHARGE-AM-PM",
		"type": "Interface",
		"datagrp": "SMARTS-PM-TOPO"
	},
	"metrics": {
		"ifSpeed": {
			"properties": {
				"name": "ifSpeed",
				"unit": "bit/s"
			},
			"value": 8.0E9
		}
	},
	"relations": [
		{
			"type": "Router",
			"element": "bq-gwhsrp.lss.com",
			"relationName": "PartOf"
		},
		{
			"type": "IPv6",
			"element": "IPv6-0:80C0:22C:330:0:0:0:1",
			"relationName": "Underlying"
		},
		{
			"type": "IPv6",
			"element": "IPv6-FFE:C0:22C:220:0:0:0:1",
			"relationName": "Underlying"
		},
		{
			"type": "",
			"element": "",
			"relationName": "Peer"
		}
	],
	"initialized": true,
	"forceRefresh": true,
	"name": "IF-bq-gwhsrp.lss.com/30"
}
Sample 2:
{
	"groupName": "group",
	"discoveryID": null,
	"jobID": "9999",
	"type": "Interface",
	"timestamp": 1551955631,
	"value": 0.0,
	"action": "r",
	"properties": {
		"ismanaged": "true",
		"source": "INCHARGE-AM-PM",
		"type": "Interface",
		"datagrp": "SMARTS-PM-METRICS"
	},
	"metrics": {
		"ifInDiscards": {
			"properties": {
				"name": "ifInDiscards",
				"unit": "Pkts/s"
			},
			"value": 0.0
		},
		"ifInUcastPkts": {
			"properties": {
				"name": "ifInUcastPkts",
				"unit": "Pkts/s"
			},
			"value": 0.0
		},
		"ifOutUcastPkts": {
			"properties": {
				"name": "ifOutUcastPkts",
				"unit": "Pkts/s"
			},
			"value": 0.0
		},
		"ifOutErrors": {
			"properties": {
				"name": "ifOutErrors",
				"unit": "Pkts/s"
			},
			"value": 0.0
		},
		"ifInNUcastPkts": {
			"properties": {
				"name": "ifInNUcastPkts",
				"unit": "Pkts/s"
			},
			"value": 0.0
		},
		"ifInErrors": {
			"properties": {
				"name": "ifInErrors",
				"unit": "Pkts/s"
			},
			"value": 0.0
		},
		"ifOutNUcastPkts": {
			"properties": {
				"name": "ifOutNUcastPkts",
				"unit": "Pkts/s"
			},
			"value": 0.0
		},
		"ifOutDiscards": {
			"properties": {
				"name": "ifOutDiscards",
				"unit": "Pkts/s"
			},
			"value": 0.0
		}
	},
	"relations": [],
	"initialized": true,
	"forceRefresh": true,
	"name": "IF-bq-gwhsrp.lss.com/50"
}