corruption errors When I try to sync

[alptolga]

Hi
I always get corruption errors. Can you help me? fast or full mode when I try to sync.

CRIT [09-08|20:54:22.403] Failed to persist accounts err="leveldb/table: corruption on data-block (pos=57475056): checksum mismatch, want=0x4644b562 got=0xd18f03e0 [file=001907.ldb]"

**Software version:

core-geth-alltools-linux-v1.12.8

Java version:

openjdk version "11.0.16" 2022-07-19
OpenJDK Runtime Environment (build 11.0.16+8-post-Ubuntu-0ubuntu118.04)
OpenJDK 64-Bit Server VM (build 11.0.16+8-post-Ubuntu-0ubuntu118.04, mixed mode, sharing)

OS Name & Version:

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.6 LTS"
NAME="Ubuntu"
VERSION="18.04.6 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.6 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic

Kernel Version:

Linux srv 5.6.17-050617-generic #202006071230 SMP Sun Jun 7 12:35:03 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

[ziogaschr]

Is this happening on a fresh datadir? Have you upgraded from an old version of core-geth?
Changing from fast to full mode will not work. Once you move from full to fast your historic data will get pruned.

1. Have you tried a fresh sync, on a new datadir?
2. Up to what block number are you synced at the moment?
3. Can it be that your hard disk is near the end of its life? Though I don't believe so, as it found the checksum for existing data.

You can try to use debug.setHead(block_number) to move in a previous state and start syncing again.

[alptolga]

I got error fast or full mode. I tried both ways after I clean the data dir for fresh sync.
I tried debug.setHead(700000) to turm back block 700000 but I couldn't
Can you give me more detail about it?

sudo ./geth --classic --syncmode full console
INFO [09-10|04:15:02.123] Starting Geth on Ethereum Classic...
INFO [09-10|04:15:02.124] Maximum peer count ETH=50 LES=0 total=50
INFO [09-10|04:15:02.124] Smartcard socket not found, disabling err="stat /run/pcscd/pcscd.comm: no such file or directory"
INFO [09-10|04:15:02.125] Set global gas cap cap=50,000,000
INFO [09-10|04:15:02.135] Configured Ethereum protocol versions capabilities=[66]
INFO [09-10|04:15:02.135] Allocated trie memory caches clean=154.00MiB dirty=256.00MiB
INFO [09-10|04:15:02.135] Allocated cache and file handles database=/home/tt/.ethereum/classic/geth/chaindata cache=512.00MiB handles=2048
INFO [09-10|04:15:02.162] Opened ancient database database=/home/tt/.ethereum/classic/geth/chaindata/ancient readonly=false
INFO [09-10|04:15:02.329] Persisted trie from memory database nodes=12356 size=1.78MiB time=18.225706ms gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [09-10|04:15:02.330] Found stored genesis block config="NetworkID: 1, ChainID: 61 Engine: ethash ECBP1100: 11380000 EIP1014: 9573000 EIP1052: 9573000 EIP1108: 10500839 EIP1344: 10500839 EIP140: 8772000 EIP145: 9573000 EIP150: 2500000 EIP152: 10500839 EIP155: 3000000 EIP160: 3000000 EIP161abc: 8772000 EIP161d: 8772000 EIP170: 8772000 EIP1884: 10500839 EIP198: 8772000 EIP2028: 10500839 EIP211: 8772000 EIP212: 8772000 EIP213: 8772000 EIP214: 8772000 EIP2200: 10500839 EIP2565: 13189133 EIP2718: 13189133 EIP2929: 13189133 EIP2930: 13189133 EIP2: 1150000 EIP3529: 14525000 EIP3541: 14525000 EIP658: 8772000 EIP7: 1150000 EthashECIP1010Continue: 5000000 EthashECIP1010Pause: 3000000 EthashECIP1017: 5000000 EthashECIP1041: 5900000 EthashECIP1099: 11700000 EthashEIP100B: 8772000 EthashHomestead: 1150000 "
INFO [09-10|04:15:02.333]
INFO [09-10|04:15:02.333] ---------------------------------------------------------------------------------------------------------------------------------------------------------
INFO [09-10|04:15:02.333] NetworkID: 1, ChainID: 61 Engine: ethash ECBP1100: 11380000 EIP1014: 9573000 EIP1052: 9573000 EIP1108: 10500839 EIP1344: 10500839 EIP140: 8772000 EIP145: 9573000 EIP150: 2500000 EIP152: 10500839 EIP155: 3000000 EIP160: 3000000 EIP161abc: 8772000 EIP161d: 8772000 EIP170: 8772000 EIP1884: 10500839 EIP198: 8772000 EIP2028: 10500839 EIP211: 8772000 EIP212: 8772000 EIP213: 8772000 EIP214: 8772000 EIP2200: 10500839 EIP2565: 13189133 EIP2718: 13189133 EIP2929: 13189133 EIP2930: 13189133 EIP2: 1150000 EIP3529: 14525000 EIP3541: 14525000 EIP658: 8772000 EIP7: 1150000 EthashECIP1010Continue: 5000000 EthashECIP1010Pause: 3000000 EthashECIP1017: 5000000 EthashECIP1041: 5900000 EthashECIP1099: 11700000 EthashEIP100B: 8772000 EthashHomestead: 1150000
INFO [09-10|04:15:02.333] ---------------------------------------------------------------------------------------------------------------------------------------------------------
INFO [09-10|04:15:02.333]
INFO [09-10|04:15:02.335] Disk storage enabled for ethash caches dir=/home/tt/.ethereum/classic/geth/etchash count=3
INFO [09-10|04:15:02.336] Disk storage enabled for ethash DAGs dir=/home/tt/.etchash count=2
INFO [09-10|04:15:02.337] Initialising Ethereum protocol network=1 dbversion=8
WARN [09-10|04:15:11.280] Truncating freezer table database=/home/tt/.ethereum/classic/geth/chaindata/ancient table=headers items=790,584 limit=783,942
WARN [09-10|04:15:11.281] Truncating freezer table database=/home/tt/.ethereum/classic/geth/chaindata/ancient table=bodies items=790,825 limit=783,942
ERROR[09-10|04:15:11.281] Error in block freeze operation err="block receipts missing, can't freeze block 795978"
INFO [09-10|04:15:11.284] Loaded most recent local header number=926,449 hash=390fa0..c4be49 td=6,309,442,910,444,059,405 age=6y8mo2w
INFO [09-10|04:15:11.284] Loaded most recent local full block number=926,449 hash=390fa0..c4be49 td=6,309,442,910,444,059,405 age=6y8mo2w
INFO [09-10|04:15:11.284] Loaded most recent local fast block number=926,449 hash=390fa0..c4be49 td=6,309,442,910,444,059,405 age=6y8mo2w
WARN [09-10|04:15:11.284] Head state missing, repairing number=926,449 hash=390fa0..c4be49 snaproot=a0a3e8..9c3638
debug.setHead(700000)
ERROR[09-10|04:15:26.455] Missing block in the middle, aiming genesis number=886,471 hash=0340ab..b82814
CRIT [09-10|04:15:26.455] Failed to store last block's hash err="leveldb/table: corruption on data-block (pos=56655003): checksum mismatch, want=0x14fbd389 got=0xddac4a44 [file=000157.ldb]"
tt@srv:~$ debug.setHead(700000)
bash: syntax error near unexpected token `700000'

[ziogaschr]

You have to run the debug command from with the console.
Below you can see an example.

Note: using sudo is not needed, though you have already used sudo and your datadir might have stored the data as root. If you are familiar you can use sudo chown -R ${USER}:${USER} <your_datadir_folder> in order to change permissions and remove sudo in your next run.

$ ./geth --classic --syncmode full console
Welcome to the Geth JavaScript console!

instance: CoreGeth/v1.12.9-unstable/darwin-arm64/go1.19.1
coinbase: 0x****
at block: 7015521 (Mon Aug 22 2022 20:50:09 GMT+0300 (EEST))
 datadir: ***
 modules: admin:1.0 debug:1.0 engine:1.0 eth:1.0 ethash:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 trace:1.0 txpool:1.0 web3:1.0

To exit, press ctrl-d or type exit
> debug.setHead(web3.toHex(700000))