Miner in Ethereum Private network is hanging

Question

These are the commands I have used.

To initialize genesis block:

$ geth --datadir ./dataDir init genesis.json


INFO [01-17|14:10:49.725] Maximum peer count                       ETH=25 LES=0 total=25
INFO [01-17|14:10:49.725] Allocated cache and file handles         database=/home/edureka/private-ethereum/dataDir/geth/chaindata cache=16 handles=16
INFO [01-17|14:10:49.754] Persisted trie from memory database      nodes=3 size=413.00B time=30.356µs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [01-17|14:10:49.755] Successfully wrote genesis state         database=chaindata                                             hash=8fd285…6ebefc
INFO [01-17|14:10:49.755] Allocated cache and file handles         database=/home/edureka/private-ethereum/dataDir/geth/lightchaindata cache=16 handles=16
INFO [01-17|14:10:49.786] Persisted trie from memory database      nodes=3 size=413.00B time=22.994µs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [01-17|14:10:49.787] Successfully wrote genesis state         database=lightchaindata                                             hash=8fd285…6ebefc

And then to start the Blockchain:

geth --datadir ./myDataDir --networkid 1114 console 2 --rpc --rpcport 8543 --rpcaddr 127.0.0.1 --rpccorsdomain "*" --rpcapi "eth,net,web3,personal,miner"

Then in geth console, I start the miner:

miner.start(1)

Now, it just hangs there. I waited for more than 40 mins but it just stays there. 

Comments

It could be because the difficulty level is set high. And maybe because of that, it is taking more time.

---

This is genesis block. Difficulty level is less:

{

   "config": {

      "chainId": 2019,

      "homesteadBlock": 0,

      "eip155Block": 0,

      "eip158Block": 0,

      "byzantiumBlock": 0

   },

   "difficulty": "0x0",

   "gasLimit": "2000000",

   "alloc": {

   }

}

---

Yes.. Difficulty level is not the problem here

Answer 1

Looking at your commands again, I figured out the problem. While initiating genesis block you have used dataDir as the Data Directory but while starting the Blockchain you have mentioned a different Data Directory (myDataDir). You have to mention the same directory. Try this:

geth --datadir ./dataDir --networkid 1114 console 2 --rpc --rpcport 8543 --rpcaddr 127.0.0.1 --rpccorsdomain "*" --rpcapi "eth,net,web3,personal,miner"