Use Elasticksearch to solve TOP N issue

The raw data is like

timestamp,   router,    interface,   src_ip,    dst_ip,    protocol,   pkts
10000000,    1.1.1.1    1            2.2.2.2    1.3.3.3    tcp         100
10000000,    1.1.1.2    2            2.2.8.2    2.3.3.3    tcp         200
10000001,    8.1.1.1    1            2.2.2.8    3.3.3.3    udp         500
10000001,    2.1.1.1    1            2.2.8.2    4.3.3.8    udp         800

I put these data into elastic search. Now I want to solve the problem:

What is the top 3 combination of src_ip and dst_ip which send most pkts.

Translate this requirements to SQL it would be:

    SELECT src_ip, dst_ip, sum(pkts) as total FROM raw_data GROUP BY src_ip, dst_ip ORDER BY total DESC LIMIT 3

Before Every thing, below are the datas, I try to do group and aggregate

{"TAG":10001,"SRC_MAC":"52:54:00:14:05:4a","DST_MAC":"52:54:00:2c:e4:7c","VLAN":1342,"COS":84,"IN_IFACE":2,"OUT_IFACE":2,"SRC_IP":"42.120.85.133","DST_IP":"42.120.83.164","SRC_MASK":24,"DST_MASK":24,"SRC_PORT":13628,"DST_PORT":13783,"PROTOCOL":"ggp","PACKETS":11,"BYTES":4330,"time":1452643200}
{"TAG":10002,"SRC_MAC":"52:54:00:5d:b5:10","DST_MAC":"52:54:00:18:d8:de","VLAN":543,"COS":66,"IN_IFACE":2,"OUT_IFACE":2,"SRC_IP":"42.120.83.123","DST_IP":"42.120.86.184","SRC_MASK":24,"DST_MASK":24,"SRC_PORT":14731,"DST_PORT":14856,"PROTOCOL":"ip","PACKETS":6,"BYTES":3958,"time":1452643200}
{"TAG":10002,"SRC_MAC":"52:54:00:50:14:e1","DST_MAC":"52:54:00:3f:50:38","VLAN":250,"COS":77,"IN_IFACE":2,"OUT_IFACE":3,"SRC_IP":"42.120.83.165","DST_IP":"42.120.86.172","SRC_MASK":24,"DST_MASK":24,"SRC_PORT":11778,"DST_PORT":14673,"PROTOCOL":"isis","PACKETS":2,"BYTES":3803,"time":1452643200}
{"TAG":10001,"SRC_MAC":"52:54:00:17:5e:e3","DST_MAC":"52:54:00:75:da:af","VLAN":2647,"COS":2,"IN_IFACE":2,"OUT_IFACE":1,"SRC_IP":"42.120.86.253","DST_IP":"42.120.83.58","SRC_MASK":24,"DST_MASK":24,"SRC_PORT":16767,"DST_PORT":16418,"PROTOCOL":"ipv6-route","PACKETS":10,"BYTES":2852,"time":1452643200}
{"TAG":10002,"SRC_MAC":"52:54:00:4a:e6:49","DST_MAC":"52:54:00:37:f2:78","VLAN":1005,"COS":88,"IN_IFACE":3,"OUT_IFACE":2,"SRC_IP":"42.120.81.90","DST_IP":"42.120.81.248","SRC_MASK":24,"DST_MASK":24,"SRC_PORT":11573,"DST_PORT":16757,"PROTOCOL":"encap","PACKETS":7,"BYTES":1745,"time":1452643200}
{"TAG":10001,"SRC_MAC":"52:54:00:52:1e:29","DST_MAC":"52:54:00:6a:2b:0e","VLAN":1816,"COS":26,"IN_IFACE":2,"OUT_IFACE":3,"SRC_IP":"42.120.82.91","DST_IP":"42.120.85.121","SRC_MASK":24,"DST_MASK":24,"SRC_PORT":15961,"DST_PORT":15761,"PROTOCOL":"gre","PACKETS":16,"BYTES":2753,"time":1452643200}
{"TAG":10000,"SRC_MAC":"52:54:00:3d:16:89","DST_MAC":"52:54:00:33:b8:54","VLAN":3393,"COS":64,"IN_IFACE":4,"OUT_IFACE":2,"SRC_IP":"42.120.86.27","DST_IP":"42.120.85.184","SRC_MASK":24,"DST_MASK":24,"SRC_PORT":18677,"DST_PORT":17202,"PROTOCOL":"eigrp","PACKETS":6,"BYTES":3474,"time":1452643200}
{"TAG":10000,"SRC_MAC":"52:54:00:01:bb:4c","DST_MAC":"52:54:00:21:91:c0","VLAN":3803,"COS":23,"IN_IFACE":1,"OUT_IFACE":2,"SRC_IP":"42.120.85.186","DST_IP":"42.120.82.206","SRC_MASK":24,"DST_MASK":24,"SRC_PORT":15093,"DST_PORT":18784,"PROTOCOL":"ospf","PACKETS":20,"BYTES":3171,"time":1452643200}     

The mapping

	curl -XGET localhost:9200/sflow/_mapping | json_reformat 

	{
		"sflow": {
			"mappings": {
				"9k": {
					"properties": {
						"BYTES": {
							"type": "long"
						},
						"COS": {
							"type": "long"
						},
						"DST_IP": {
							"type": "string"
						},
						"DST_MAC": {
							"type": "string"
						},
						"DST_MASK": {
							"type": "long"
						},
						"DST_PORT": {
							"type": "long"
						},
						"IN_IFACE": {
							"type": "long"
						},
						"OUT_IFACE": {
							"type": "long"
						},
						"PACKETS": {
							"type": "long"
						},
						"PROTOCOL": {
							"type": "string"
						},
						"SRC_IP": {
							"type": "string"
						},
						"SRC_MAC": {
							"type": "string"
						},
						"SRC_MASK": {
							"type": "long"
						},
						"SRC_PORT": {
							"type": "long"
						},
						"TAG": {
							"type": "long"
						},
						"VLAN": {
							"type": "long"
						},
						"time": {
							"type": "long"
						}
					}
				}
			}
		}
	}

The agg query

curl -XPOST 'localhost:9200/sflow/_search?pretty' -d '
{
  "query": { "match_all": {} },
	"aggs":
		{
			"by_SRC_IP": 
				{
					"terms": {"script": "[doc.SRC_IP.value, doc.DST_IP.value].join('-')","size": 3, "order": {"sum_bits": "desc"}},
					"aggs": { "sum_bits": { "sum": {"field": "BYTES"} } }
				}
		}
}'

The output

{
  "error" : {
    "root_cause" : [ {
      "type" : "groovy_script_compilation_exception",
      "reason" : "failed to compile groovy script"
    } ],
    "type" : "search_phase_execution_exception",
    "reason" : "all shards failed",
    "phase" : "query",
    "grouped" : true,
    "failed_shards" : [ {
      "shard" : 0,
      "index" : "sflow",
      "node" : "N0xpH1hbQG-V9DU-ANfVgw",
      "reason" : {
        "type" : "script_exception",
        "reason" : "Failed to compile inline script [[doc.SRC_IP.value, doc.DST_IP.value].join(-)] using lang [groovy]",
        "caused_by" : {
          "type" : "groovy_script_compilation_exception",
          "reason" : "failed to compile groovy script",
          "caused_by" : {
            "type" : "multiple_compilation_errors_exception",
            "reason" : "startup failed:
c6d3ea304aad32f8cc4f0efa6b5540cf0ad6be1a: 1: unexpected token: ) @ line 1, column 44.
   alue, doc.DST_IP.value].join(-)
                                 ^

1 error
"
          }
        }
      }
    } ]
  },
  "status" : 500
}