I've been trying to maintain a full node for several months. It seemed to be working until I noticed zero balances this morning. etherscan.io site confirmed that balances are not zero, so investigating further, I see on my node that in spite of having accumulated a terabyte of blockchain, and until recently been able to view balances properly:

> eth.getBlock("latest").number


> eth.syncing 
   currentBlock: 8225916,
   highestBlock: 8226042,
   knownStates: 85829054,
   pulledStates: 85828145,
   startingBlock: 8224824 

The process running this has always been:

31300 pts/12   Sl+  222:33 /cnodes/engines/bin/geth --syncmode full --cache=2048 --rpc --maxpeers 100 --verbosity 2

Yet I see messages logged like this:

 WARN [07-26|07:10:11.117] Dropping unsynced node during fast sync  id=711b6ab8f303771e conn=dyndial addr=  type=Geth/v1.8.2-stable-b8b9f7f4/linux-amd64/go1.9.4

I am wondering what I might have done to put it in this state, perhaps by restarting geth in bad circumstances such as after running out of space and providing more. I have always specified full sync. This is certain because it is script driven and the option is hard coded. I'd much appreciate any enlightenment that anyone can offer.

  • What version of geth are you using? There was a fork on February 2019 you need to have at least geth v1.8.22.
    – Ismael
    Jul 26 '19 at 16:10
  • 1.8.27 - root@merle:/cnodes/engines# sum bin/geth 44498 32749 root@merle:/cnodes/engines# sum geth-linux-amd64-1.8.27-4bcc0a37/geth 44498 32749 Jul 26 '19 at 20:19
  • How many peers are connected to your node? Are you behind a NAT? In a node we have observed that after some time it is left with a single peer and it will stop downloading from it, usually after restarting the node it will start syncing again with the same peer.
    – Ismael
    Jul 28 '19 at 6:28
  • Two peers shortly after restarting just now (see below). Yes, behind NAT. ` > admin.peers.forEach(function(value){console.log(value.network.remoteAddress+"\t"+value.name)}) Geth/v1.9.1-stable-b7b2f60f/linux-amd64/go1.11.5 Geth/v1.9.0-stable/linux-amd64/go1.10.4 ` Jul 29 '19 at 20:41
  • Update: I see messages like this in log now: WARN [07-29|16:33:20.621] Node data write error err="state node 3c5221…6471a8 failed with all peers (2 tries, 2 peers)" Jul 29 '19 at 20:49

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