parse-server: Parse Push to iOS hanging in parse-server 2.5.3

Issue Description

When sending a push from Cloud Code in 2.5.3, the notification seems to hang while being sent. On the Dashboard, the status of the push remains as sending. With VERBOSE=1, the logs don’t show anything beyond the “sending push to X installations” step. No push notification is received on the device. Pushes seem to be working fine on Android/GCM.

This is not an issue in 2.4.2 for me, and only occurs when I upgrade to 2.5.3.

Steps to reproduce

I am running a simple Cloud Code function that sends a push notification to a single installation:

Parse.Cloud.define("testPush", function(request, response) {
  Parse.Push.send({
    channels: [ USER_CHANNEL ],
    expiration_interval: 15,
    data: {
      alert: request.params.message,
      title: "GreatApp"
    }
  }, {
    useMasterKey: true
  }).then(function()  {
    response.success("OK");
  });
});

My parse-server push configuration is as follows:

  push: {
    android: {
      senderId: 'XYZ',
      apiKey: 'XYZ'
    },
    ios: [
      {
        pfx: __dirname + '/certs/prod.p12',
        bundleId: 'com.GreatApp',
        production: true
      },
      {
        pfx: __dirname + '/certs/dev.p12',
        bundleId: 'com.GreatApp',
        production: false
      }
    ]
  },

Environment Setup

• Server
  • parse-server version: 2.5.3
  • Heroku

Logs/Trace

On parse-server 2.4.2, the push is received on my iOS device:

12:18:30 web.1   |  verbose: REQUEST for [POST] /parse/push: {
12:18:30 web.1   |    "channels": [
12:18:30 web.1   |      "user_xyz"
12:18:30 web.1   |    ],
12:18:30 web.1   |    "data": {
12:18:30 web.1   |      "alert": "This is a push!",
12:18:30 web.1   |      "title": "GreatApp"
12:18:30 web.1   |    },
12:18:30 web.1   |    "expiration_interval": 15
12:18:30 web.1   |  } method=POST, url=/parse/push, user-agent=node-XMLHttpRequest, Parse/js1.9.2 (NodeJS 5.12.0), accept=*/*, content-type=text/plain, host=localhost:1337, content-length=307, connection=close, channels=[user_xyz], alert=This is a push!, title=GreatApp, expiration_interval=15
12:18:30 web.1   |  verbose: RESPONSE from [POST] /parse/push: {
12:18:30 web.1   |    "headers": {
12:18:30 web.1   |      "X-Parse-Push-Status-Id": "kdst8cZERc"
12:18:30 web.1   |    },
12:18:30 web.1   |    "response": {
12:18:30 web.1   |      "result": true
12:18:30 web.1   |    }
12:18:30 web.1   |  } X-Parse-Push-Status-Id=kdst8cZERc, result=true
12:18:30 web.1   |  info: Ran cloud function testPush for user XYZ with:
12:18:30 web.1   |    Input: {"message":"This is a push!"}
12:18:30 web.1   |    Result: "OK" functionName=testPush, message=This is a push!, user=XYZ
12:18:30 web.1   |  verbose: RESPONSE from [POST] /parse/functions/testPush: {
12:18:30 web.1   |    "response": {
12:18:30 web.1   |      "result": "OK"
12:18:30 web.1   |    }
12:18:30 web.1   |  } result=OK
12:18:30 web.1   |  verbose: _PushStatus kdst8cZERc: sending push to 1 installations
12:18:30 web.1   |  verb
12:18:30 web.1   |  parse-server-push-adapter APNS
12:18:30 web.1   |   APNS Connection 0 Connected
12:18:30 web.1   |  verb
12:18:30 web.1   |   parse-server-push-adapter APNS APNS Connection 0 Notification transmitted to 5c1...(device token)
12:18:30 web.1   |  verbose: _PushStatus kdst8cZERc: sent push! 0 success, 0 failures

On parse-server 2.5.3, the push is not received:

12:22:56 web.1   |  verbose: REQUEST for [POST] /parse/push: {
12:22:56 web.1   |    "channels": [
12:22:56 web.1   |      "user_xyz"
12:22:56 web.1   |    ],
12:22:56 web.1   |    "data": {
12:22:56 web.1   |      "alert": "This is a push!",
12:22:56 web.1   |      "title": "GreatApp"
12:22:56 web.1   |    },
12:22:56 web.1   |    "expiration_interval": 15
12:22:56 web.1   |  } method=POST, url=/parse/push, user-agent=node-XMLHttpRequest, Parse/js1.10.0 (NodeJS 5.12.0), accept=*/*, content-type=text/plain, host=localhost:1337, content-length=308, connection=close, channels=[user_xyz], alert=This is a push!, title=GreatApp, expiration_interval=15
12:22:56 web.1   |  verbose: RESPONSE from [POST] /parse/push: {
12:22:56 web.1   |    "headers": {
12:22:56 web.1   |      "X-Parse-Push-Status-Id": "nOEjLtSWcO"
12:22:56 web.1   |    },
12:22:56 web.1   |    "response": {
12:22:56 web.1   |      "result": true
12:22:56 web.1   |    }
12:22:56 web.1   |  } X-Parse-Push-Status-Id=nOEjLtSWcO, result=true
12:22:56 web.1   |  info: Ran cloud function testPush for user XYZ with:
12:22:56 web.1   |    Input: {"message":"This is a push!"}
12:22:56 web.1   |    Result: "OK" functionName=testPush, message=This is a push!, user=XYZ
12:22:56 web.1   |  verbose: RESPONSE from [POST] /parse/functions/testPush: {
12:22:56 web.1   |    "response": {
12:22:56 web.1   |      "result": "OK"
12:22:56 web.1   |    }
12:22:56 web.1   |  } result=OK
12:22:56 web.1   |  verbose: _PushStatus nOEjLtSWcO: sending push to 1 installations