Revert "Partition healing (#264) and "Periodical partition healing (#…

…265)" (#270)

6c025bcc67bdeb1dd5b55269195a740f2e283fc5a and 02be536 are using a dev-dependency (async) from production code. This commit those two commits so master is in a stable state again.

config.js

@@ -131,19 +131,6 @@ Config.prototype._seed = function _seed(seed) {
     // Number of allowable inflight requests sent by RingpopClient.
     seedOrDefault('inflightClientRequestsLimit', 100);
 
-    // Healer config
-    // Maximum number of heal failures in one period.
-    seedOrDefault('discoverProviderHealerMaxFailures', 10);
-    // The time of a period in ms.
-    seedOrDefault('discoverProviderHealerPeriod', 30000);
-    // The base probability of a node to run in a period: the average number
-    // of nodes in each period that will perform the heal algorithm in a period.
-    // E.g. if there are 100 nodes and the base probability is 3, there is a
-    // chance of 3/100 that a node will run.
-    seedOrDefault('discoverProviderHealerBaseProbability', 3);
-    // Enable the period healer.
-    seedOrDefault('discoverProviderHealerPeriodicEnabled', true);
-
     function seedOrDefault(name, defaultVal, validator, reason) {
         var seedVal = seed[name];
         if (typeof seedVal === 'undefined') {

index.js

@@ -70,7 +70,6 @@ var validateHostPort = require('./lib/util').validateHostPort;
 var sendJoin = require('./lib/gossip/joiner.js').joinCluster;
 var TracerStore = require('./lib/trace/store.js');
 var middleware = require('./lib/middleware');
-var DiscoverProviderHealer = require('./lib/partition_healing').DiscoverProviderHealer;
 
 var HOST_PORT_PATTERN = /^(\d+.\d+.\d+.\d+):\d+$/;
 var MEMBERSHIP_UPDATE_FLUSH_INTERVAL = 5000;
@@ -204,8 +203,6 @@ function RingPop(options) {
 
     this.tchannelVersion = getTChannelVersion();
     this.ringpopVersion = packageJSON.version;
-
-    this.healer = new DiscoverProviderHealer(this);
 }
 
 require('util').inherits(RingPop, EventEmitter);

lib/on_ringpop_event.js

@@ -25,7 +25,6 @@ function createDestroyedHandler(ringpop) {
         ringpop.lagSampler.stop();
         ringpop.membership.stopDampScoreDecayer();
         ringpop.damper.destroy();
-        ringpop.healer.stop();
     };
 }
 
@@ -38,10 +37,6 @@ function createReadyHandler(ringpop) {
         if (ringpop.config.get('backpressureEnabled')) {
             ringpop.lagSampler.start();
         }
-
-        if (ringpop.config.get('discoverProviderHealerPeriodicEnabled')) {
-            ringpop.healer.start();
-        }
     };
 }