close r.Body, remove network metrics, updated other sections as needed

closes #430
closes #452

CHANGELOG.md

@@ -4,6 +4,10 @@
 - [#427](https://github.com/influxdb/telegraf/pull/427): zfs plugin: pool stats added. Thanks @allenpetersen!
 - [#428](https://github.com/influxdb/telegraf/pull/428): Amazon Kinesis output. Thanks @jimmystewpot!
 
+### Bugfixes
+- [#430](https://github.com/influxdb/telegraf/issues/430): Network statistics removed in elasticsearch 2.1. Thanks @jipperinbham!
+- [#452](https://github.com/influxdb/telegraf/issues/452): Elasticsearch open file handles error. Thanks @jipperinbham!
+
 ## v0.2.4 [2015-12-08]
 
 ### Features

plugins/elasticsearch/elasticsearch.go

@@ -22,7 +22,6 @@ type node struct {
 	Process    interface{}       `json:"process"`
 	JVM        interface{}       `json:"jvm"`
 	ThreadPool interface{}       `json:"thread_pool"`
-	Network    interface{}       `json:"network"`
 	FS         interface{}       `json:"fs"`
 	Transport  interface{}       `json:"transport"`
 	HTTP       interface{}       `json:"http"`
@@ -136,7 +135,6 @@ func (e *Elasticsearch) gatherNodeStats(url string, acc plugins.Accumulator) err
 			"process":     n.Process,
 			"jvm":         n.JVM,
 			"thread_pool": n.ThreadPool,
-			"network":     n.Network,
 			"fs":          n.FS,
 			"transport":   n.Transport,
 			"http":        n.HTTP,
@@ -202,7 +200,11 @@ func (e *Elasticsearch) gatherData(url string, v interface{}) error {
 	if err != nil {
 		return err
 	}
+	defer r.Body.Close()
 	if r.StatusCode != http.StatusOK {
+		// NOTE: we are not going to read/discard r.Body under the assumption we'd prefer
+		// to let the underlying transport close the connection and re-establish a new one for
+		// future calls.
 		return fmt.Errorf("elasticsearch: API responded with status-code %d, expected %d", r.StatusCode, http.StatusOK)
 	}
 	if err = json.NewDecoder(r.Body).Decode(v); err != nil {

plugins/elasticsearch/elasticsearch_test.go

@@ -58,7 +58,6 @@ func TestElasticsearch(t *testing.T) {
 		processExpected,
 		jvmExpected,
 		threadPoolExpected,
-		networkExpected,
 		fsExpected,
 		transportExpected,
 		httpExpected,

plugins/elasticsearch/testdata_test.go

@@ -200,19 +200,11 @@ const statsResponse = `
       },
       "os": {
         "timestamp": 1436460392944,
-        "uptime_in_millis": 25092,
         "load_average": [
           0.01,
           0.04,
           0.05
         ],
-        "cpu": {
-          "sys": 0,
-          "user": 0,
-          "idle": 99,
-          "usage": 0,
-          "stolen": 0
-        },
         "mem": {
           "free_in_bytes": 477761536,
           "used_in_bytes": 1621868544,
@@ -236,8 +228,6 @@ const statsResponse = `
           "total_in_millis": 15480
         },
         "mem": {
-          "resident_in_bytes": 246382592,
-          "share_in_bytes": 18747392,
           "total_virtual_in_bytes": 4747890688
         }
       },
@@ -439,20 +429,6 @@ const statsResponse = `
           "completed": 0
         }
       },
-      "network": {
-        "tcp": {
-          "active_opens": 13,
-          "passive_opens": 16,
-          "curr_estab": 29,
-          "in_segs": 113,
-          "out_segs": 97,
-          "retrans_segs": 0,
-          "estab_resets": 0,
-          "attempt_fails": 0,
-          "in_errs": 0,
-          "out_rsts": 0
-        }
-      },
       "fs": {
         "timestamp": 1436460392946,
         "total": {
@@ -464,7 +440,6 @@ const statsResponse = `
           {
             "path": "/usr/share/elasticsearch/data/elasticsearch/nodes/0",
             "mount": "/usr/share/elasticsearch/data",
-            "dev": "/dev/sda1",
             "type": "ext4",
             "total_in_bytes": 19507089408,
             "free_in_bytes": 16909316096,
@@ -590,12 +565,6 @@ var osExpected = map[string]float64{
 	"os_swap_used_in_bytes":       0,
 	"os_swap_free_in_bytes":       487997440,
 	"os_timestamp":                1436460392944,
-	"os_uptime_in_millis":         25092,
-	"os_cpu_sys":                  0,
-	"os_cpu_user":                 0,
-	"os_cpu_idle":                 99,
-	"os_cpu_usage":                0,
-	"os_cpu_stolen":               0,
 	"os_mem_free_percent":         74,
 	"os_mem_used_percent":         25,
 	"os_mem_actual_free_in_bytes": 1565470720,
@@ -605,8 +574,6 @@ var osExpected = map[string]float64{
 }
 
 var processExpected = map[string]float64{
-	"process_mem_resident_in_bytes":      246382592,
-	"process_mem_share_in_bytes":         18747392,
 	"process_mem_total_virtual_in_bytes": 4747890688,
 	"process_timestamp":                  1436460392945,
 	"process_open_file_descriptors":      160,
@@ -756,19 +723,6 @@ var threadPoolExpected = map[string]float64{
 	"thread_pool_flush_completed":               3,
 }
 
-var networkExpected = map[string]float64{
-	"network_tcp_in_errs":       0,
-	"network_tcp_passive_opens": 16,
-	"network_tcp_curr_estab":    29,
-	"network_tcp_in_segs":       113,
-	"network_tcp_out_segs":      97,
-	"network_tcp_retrans_segs":  0,
-	"network_tcp_attempt_fails": 0,
-	"network_tcp_active_opens":  13,
-	"network_tcp_estab_resets":  0,
-	"network_tcp_out_rsts":      0,
-}
-
 var fsExpected = map[string]float64{
 	"fs_timestamp":                1436460392946,
 	"fs_total_free_in_bytes":      16909316096,