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Questions tagged [synchronization]

Syntonization is the process where your node / client (geth, Ethereum Wallet, etc) receives the most up to date data from the Ethereum blockchain.

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Private blockchain losing access to older blocks

So, my private blockchain became out of sync and one of the nodes reset to block 0 – it then synced up with the other nodes. The node that went to block 0 is the node that is providing the rpc port ...
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Node replication

In a multi node network (4 node), if one of the node is down and comes up with higher block number and with faulty data . Will all other three nodes replicates with the failed node data. or all the ...
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Wallet stopped syncing on block 7,160,687

my Mist/ Ethereum Wallet version 0.11.1 stopped process synchronisation on block 7,160,687. What do I have to do to get it going?
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Is it possible to call a Contracts function from a set setTimer? Web3JS

I want to be able to call a function of a contract every 60-120 seconds, in my JavaScript code I have a set timer that runs for down a timer from 120 seconds down to 0 by subtracting 0.01 every 10 ...
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Why geth light mode syncing keeps stopping after it stopped first time? And how should I figure this out?

I used geth fast sync mode before, but it kept stopped and when it stopped, I had to delete all synced data and start over again. So I changed to "light" sync mode, and it worked well for a month. But ...
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Geth not download certain block number

I'm running a testnet geth node in fastmode and I have a worker that will check the transaction data in the blocks. However, I noticed that geth jumped from block 4990417 to 4990429, skipping the ...
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Geth syncing fast Ropsten too long delays between importing new segments

i have a problem with my Geth Ropsten node. Time between importing new segments of chain is too long. For example logs from my docker container below geth-testnet_1_6d184080c9e1 | INFO [02-11|13:30:...
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Node lags behind 100 blocks, states are finished syncing

I run my geth node with the following command: ./geth --cache 8192 --syncmode full It has been syncing for a long time, and it looks like it has finished syncing: > eth.syncing { currentBlock: ...
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Known states for testnet on fast sync mode Nov - 2018

Whats the current knownStates for testnet on fast sync mode Nov - 2018 Is there an online service which provides the current states of the ethereum testnet. It been several days and --testnet fast ...
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334 views

Private Ethereum blockchain does not sync last 65 block

I've successfully create a private Ethereum network, I've two machines on the same local network, the first one is where I've created the chain, the second should be a new peer that should sync with ...
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can't read past event logs

const event = contractInst.Transfer({},{fromBlock: 0, toBlock: 'latest'}); events.get(function (error, result) { if (!error) { console.log(result); } }); The get ...
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Getting Errors while syncing of blocks (Ropsten network)

Today the block sync with Ropsten network on my machine is giving me following error :- ERROR[06-05|06:59:12] ########## BAD BLOCK ######### Chain config: {ChainID: 3 Homestead: 0 DAO: <nil> ...
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How block are validated in a private blockchain

I have running a private blockchain with 4 nodes, and when i'm creating my Dapp, i have specified for the web3 address only one node ( Ip; port, RCP) So, my question is , how the others nodes ...
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334 views

Can not sync to ropsten

I have trouble syncing to Ropsten. I have just upgraded geth version to 1.8.7, then i run the command to remove the old chain: geth --testnet removedb. Then the command: geth --testnet --syncmode "...
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Runtime out of memory on RPi with ethereum node

I have a private network of ethereum with 2 miners on my PC and a node on RPi, after syncing it says: Fatal: runtime: out of memory The sd card is 16Gb and it should have plenty of free space, is RAM ...
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Gap in the block chain synchronization when interrupted

I was synchronizing the block chain with geth --fast --cache=1024. Then I got the message synchronization failed and I pressed CTRL+C because I had for some reasons to shutdown the VM [I am running ...
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317 views

How can I estimate the time remaining to complete a sync?

I would like to know approximately how long it will take my geth node to complete syncing. There was a previous question that was similar to mine, but less specific, and it was closed in favor of a ...
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Geth syncing - Jan 18, how much time should wait before I call it quits. (First time miner)

After 3 days; current status: > eth.syncing { currentBlock: 4829460, highestBlock: 4829665, knownStates: 19675738, pulledStates: 19646971, startingBlock: 4828906 } Getting ti
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Where does blockchain data come from if there are no peers?

I'm still having problems syncing. I've kept my client up-to-date, I'm using an SSD, and I have 1Gbps/1Gbps internet service. It just hangs with 270 blocks remaining forever. The logs say: INFO [...
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38 views

Can I access last mined block if my node is not there yet?

This might be a stupid question, but I'll ask anyway... I'm currently connected to Ropsten and when I execute eth.blockNumber it says 1853682 (I'm like 300000 blocks away from current last mined ...
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801 views

syncing forever

I'm trying to mine using the commands geth --rpc and ethminer on an ubuntu 16.04 machine. Sometimes it works, but often after I restart my PC, I get the error "Network syncing, will start miner ...
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If I am fast syncing Ropsten, and i close the command prompt or Mist and reopen Mist, will it continue to fast sync?

Just wondering since I was trying to fast sync Ropsten with Mist and it came to a block number around 600,000 and stopped, so I closed Mist and reopened it and it only got to the "started swarm" part. ...
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Ethereum Wallet and Mist stuck on block 1,699,999 even after updating to latest version of geth

geth version Geth Version: 1.7.2-stable Git Commit: 1db4ecdc0b9e828ff65777fb466fc7c1d04e0de9 Architecture: amd64 Protocol Versions: [63 62] Network Id: 1 Go Version: go1.9.1 Operating System: darwin ...
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Why does sync eat up all RAM and hang my computer?

I have installed the Wallet v0.9.1 but have not been able to reach sync. It starts at good speed (1000 blocks/sec), but after 1 hour and 3.5Mblocks it slows down and I notice my 8GB RAM is taken. ...
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191 views

Do I really need to sync Geth even if I already have synced Ethereum Wallet?

I already have Ethereum Wallet installed and synced, fully working. But I am working on a cryptocurrencies-based project and I needed the JSON-RPC, so I installed Geth. However Geth seems not to be ...
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Ethereum wallet

Like many others I'm really struggling with setting up the ethereum wallet. I deleted the chaindata folder in order to make the download process quicker. Unfortunately I closed the ethereum wallet ...
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240 views

Can't launch mist wallet. Stuck after pressing 'launch application' in windows 10

Hi. I downloaded Mist wallet and then after some time when the 'launch application' button came up, I pressed that. However, now I only see the following image on my screen and the figures shown ...
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128 views

Mist Wallet Synch Stuck - Not coder/geek

I too have the 'synch stuck' syndrome suffered by many others. I don't think I've ever been this frustrated but am trying to be patient. After 12-24 hours I get stuck around 2.4m block after multiple ...
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Bought Ethreum with BTC, exchange freezed, sync freezed too

I've purchased ETH by BTC. My exchange stucked on "Awaiting Exchange" (like 2 hours now) and my Sync stucked at the same time (19%). What should I do now? Thank you!