Blockchain stops syncing after a while

[dwalintukan]

After running the node for a while, it seems to get stuck and stop syncing. I am syncing from scratch and currently stuck at block 5201.

It has been stuck like this for at least 15 minutes.

2018-05-29 08:28:05 UpdateTip: new best=6b493b7fdb8d29e03821e7fc9a8fab20718d0962c78925085348c3997944e20e height=5200 version=0x20000003 log2_work=58.638317 tx=5448 date='2017-09-08 13:10:08' progress=0.002519 cache=2.3MiB(16819txo)
2018-05-29 08:28:05 ProcessNetBlock: ACCEPTED
2018-05-29 08:28:05 UpdateTip: new best=a7543b66cc8719af8b6387678bf94734ad89c5d8e48b2c7461129cd4e53e6a01 height=5201 version=0x20000003 log2_work=58.646145 tx=5450 date='2017-09-08 13:13:20' progress=0.002520 cache=2.3MiB(16822txo)
2018-05-29 08:28:05 ProcessNetBlock: ACCEPTED
2018-05-29 08:28:07 connect() to [2605:a601:1156:2600:41e9:3c24:6a5b:5ca3]:3888 failed after select(): Connection refused (61)
2018-05-29 08:28:48 connect() to 125.191.47.22:3888 failed after select(): Connection refused (61)
2018-05-29 08:30:13 Timeout downloading block 4638441d34e71b545a4e68da061131a39c9f2348a9c9695cd6a2b1218f4a313a from peer=1, disconnecting
2018-05-29 08:31:09 connect() to [2001:8003:7553:dd00:a1d2:b6af:6723:2fc9]:3888 failed after select(): Connection refused (61)
2018-05-29 08:31:14 connect() to [2602:306:cd57:2550:8e6:1db4:72c8:dbad]:3888 failed after select(): Connection refused (61)

qtumcore-node.json

{
  "network": "livenet",
  "port": 3001,
  "services": [
    "qtumd",
    "qtum-insight-api",
    "web"
  ],
  "servicesConfig": {
    "qtum-insight-api": {
      "routePrefix": "qtum-insight-api",
      "rateLimiterOptions": {
      "whitelist": [
         "123.456.12.34",
         "::ffff:123.456.12.34"
       ],
      "whitelistLimit": 9999999,
      "limit": 200,
      "interval": 60000,
      "banInterval": 3600000
      },
      "db": {
        "host": "127.0.0.1",
        "port": "27017",
        "database": "qtum-api-livenet",
        "user": "",
        "password": ""
      },
      "erc20": {
        "updateFromBlockHeight": 0
      }
    },
    "qtumd": {
      "spawn": {
        "datadir": "./data",
        "exec": "/Users/deric/coding/qtum-bitcore/src/qtumd"
      }
    }
  }
}

qtum.conf

server=1
whitelist=127.0.0.1
txindex=1
addressindex=1
addrindex=1
timestampindex=1
spentindex=1
zmqpubrawtx=tcp://127.0.0.1:28332
zmqpubhashblock=tcp://127.0.0.1:28332
rpcallowip=127.0.0.1
rpcport=18332
rpcuser=bodhi
rpcpassword=bodhi
gen=0
logevents=1
reindex=1