I got a big blockchain synced and a lot of errors !
[2020-10-27 22:08:46] 4 CPU cores available, 2 miner threads selected.
[2020-10-27 22:08:46] 2 miner threads started, using 'yespower' algorithm.
[2020-10-27 22:08:46] Empty data received in json_rpc_call.
[2020-10-27 22:08:46] getblocktemplate failed, falling back to getwork
[2020-10-27 22:08:46] Empty data received in json_rpc_call.
[2020-10-27 22:08:46] json_rpc_call failed, retry after 10 seconds
[2020-10-27 22:08:57] Empty data received in json_rpc_call.
[2020-10-27 22:08:57] json_rpc_call failed, retry after 10 seconds