Starting from 3.2.5 if bind_ip is set to 0.0.0.0 it will end up in the replica set config if rs.initiate() is executed with no arguments

2016-05-23T15:03:13.588-0700 I REPL     [ReplicationExecutor] New replica set config in use: { _id: "MMS", version: 1, protocolVersion: 1, members: [ { _id: 0, host: "0.0.0.0:28107", arbiterOnly: false, buildIndexes: true, hidden: false, priority: 1.0, tags: {}, slaveDelay: 0, votes: 1 } ], settings: { chainingAllowed: true, heartbeatIntervalMillis: 2000, heartbeatTimeoutSecs: 10, electionTimeoutMillis: 10000, getLastErrorModes: {}, getLastErrorDefaults: { w: 1, wtimeout: 0 }, replicaSetId: ObjectId('57437e1f88f956063b96e00c') } }

2016-05-23T15:03:13.588-0700 I REPL     [ReplicationExecutor] This node is 0.0.0.0:28107 in the config

...

2016-05-23T15:04:29.958-0700 W REPL     [ReplicationExecutor] Got error (BadValue: Received heartbeat from member with the same member ID as ourself: 0) response on heartbeat request to hostnameX:28107; { ok: 1.0, hbmsg: "" }

var cfg = {

      _id: "testRS",

      version: 1,

      members: [

         { _id: 0, host : "host1:27017"},

         { _id: 1, host : "host2:27017"},

         { _id: 2, host : "host3:27017"}

      ]

   };

rs.initiate(cfg);