add missing apm-server response error monitor

x-pack/plugins/monitoring/server/lib/metrics/__test__/__snapshots__/metrics.test.js.snap

@@ -670,6 +670,47 @@ Object {
     "units": "/m",
     "uuidField": "cluster_uuid",
   },
+  "apm_responses_errors_internal": ApmEventsRateClusterMetric {
+    "aggs": Object {
+      "beats_uuids": Object {
+        "aggs": Object {
+          "event_rate_per_beat": Object {
+            "max": Object {
+              "field": "beats_stats.metrics.apm-server.server.response.errors.internal",
+            },
+          },
+        },
+        "terms": Object {
+          "field": "beats_stats.beat.uuid",
+          "size": 10000,
+        },
+      },
+      "event_rate": Object {
+        "sum_bucket": Object {
+          "buckets_path": "beats_uuids>event_rate_per_beat",
+          "gap_policy": "skip",
+        },
+      },
+      "metric_deriv": Object {
+        "derivative": Object {
+          "buckets_path": "event_rate",
+          "gap_policy": "skip",
+          "unit": "1m",
+        },
+      },
+    },
+    "app": "apm",
+    "derivative": true,
+    "description": "HTTP Requests rejected due to a miscellaneous internal error",
+    "field": "beats_stats.metrics.apm-server.server.response.errors.internal",
+    "format": "0,0.[00]",
+    "label": "Internal",
+    "metricAgg": "max",
+    "timestampField": "beats_stats.timestamp",
+    "title": "Internal",
+    "units": "/m",
+    "uuidField": "cluster_uuid",
+  },
   "apm_responses_errors_method": ApmEventsRateClusterMetric {
     "aggs": Object {
       "beats_uuids": Object {

x-pack/plugins/monitoring/server/lib/metrics/apm/metrics.js

@@ -284,6 +284,18 @@ export const metrics = {
       defaultMessage: 'HTTP Requests rejected during server shutdown'
     })
   }),
+  apm_responses_errors_internal: new ApmEventsRateClusterMetric({
+    field: 'beats_stats.metrics.apm-server.server.response.errors.internal',
+    title: i18n.translate('xpack.monitoring.metrics.apm.responseErrors.internalTitle', {
+      defaultMessage: 'Internal'
+    }),
+    label: i18n.translate('xpack.monitoring.metrics.apm.responseErrors.internalLabel', {
+      defaultMessage: 'Internal'
+    }),
+    description: i18n.translate('xpack.monitoring.metrics.apm.responseErrors.internalDescription', {
+      defaultMessage: 'HTTP Requests rejected due to a miscellaneous internal error'
+    })
+  }),
 
   apm_processor_transaction_transformations: new ApmEventsRateClusterMetric({
     field: 'beats_stats.metrics.apm-server.processor.transaction.transformations',

x-pack/plugins/monitoring/server/routes/api/v1/apm/metric_set_instance.js

@@ -59,6 +59,7 @@ export const metricSet = [
       'apm_responses_errors_forbidden',
       'apm_responses_errors_concurrency',
       'apm_responses_errors_closed',
+      'apm_responses_errors_internal',
     ],
     name: 'apm_responses_errors'
   },

x-pack/plugins/monitoring/server/routes/api/v1/apm/metric_set_overview.js

@@ -59,6 +59,7 @@ export const metricSet = [
       'apm_responses_errors_forbidden',
       'apm_responses_errors_concurrency',
       'apm_responses_errors_closed',
+      'apm_responses_errors_internal',
     ],
     name: 'apm_responses_errors'
   },

x-pack/test/api_integration/apis/monitoring/apm/fixtures/cluster.json

@@ -590,6 +590,29 @@
         [1535723910000, 0],
         [1535723940000, 0]
       ]
+    }, {
+      "bucket_size": "30 seconds",
+      "timeRange": {
+        "min": 1535720389104,
+        "max": 1535723989104
+      },
+      "metric": {
+        "app": "apm",
+        "field": "beats_stats.metrics.apm-server.server.response.errors.internal",
+        "metricAgg": "max",
+        "label": "Internal",
+        "title": "Internal",
+        "description": "HTTP Requests rejected due to a miscellaneous internal error",
+        "units": "/m",
+        "format": "0,0.[00]",
+        "hasCalculation": false,
+        "isDerivative": true
+      },
+      "data": [
+        [1535723880000, null],
+        [1535723910000, 0],
+        [1535723940000, 0]
+      ]
     }],
     "apm_requests": [{
       "bucket_size": "30 seconds",

x-pack/test/api_integration/apis/monitoring/apm/fixtures/instance.json

@@ -581,6 +581,29 @@
         [1535723910000, 0],
         [1535723940000, 0]
       ]
+    }, {
+      "bucket_size": "30 seconds",
+      "timeRange": {
+        "min": 1535720389104,
+        "max": 1535723989104
+      },
+      "metric": {
+        "app": "apm",
+        "field": "beats_stats.metrics.apm-server.server.response.errors.internal",
+        "metricAgg": "max",
+        "label": "Internal",
+        "title": "Internal",
+        "description": "HTTP Requests rejected due to a miscellaneous internal error",
+        "units": "/m",
+        "format": "0,0.[00]",
+        "hasCalculation": false,
+        "isDerivative": true
+      },
+      "data": [
+        [1535723880000, null],
+        [1535723910000, 0],
+        [1535723940000, 0]
+      ]
     }],
     "apm_requests": [{
       "bucket_size": "30 seconds",

x-pack/test/functional/es_archives/monitoring/apm/mappings.json

@@ -387,6 +387,9 @@
                                   },
                                   "validate": {
                                     "type": "long"
+                                  },
+                                  "internal": {
+                                    "type": "long"
                                   }
                                 }
                               },
@@ -685,4 +688,4 @@
     },
     "aliases": {}
   }
-}
+}