Fatal: Failed to register the Ethereum service

[Ericalvin]

Hello every .
When I restart my host , I found my geth log say :
Fatal: Failed to register the Ethereum service: gap (#5734246) in the chain between ancients and leveldb

what can i do to fix, thank you.

my geth version:1.10.25

[holiman]

Could you please provide
geth db metadata (if you have any special arguments like --datadir, or --goerli, you need to provide those too).
Also the boot-up log from starting geth, maybe ~150 lines or so,

[Ericalvin]

@holiman hi , below is info
use:
geth --authrpc.addr localhost --authrpc.port 8551 --authrpc.vhosts localhost --authrpc.jwtsecret /data/geth/jwtsecret --ignore-legacy-receipts --http --http.port 8545 --http.addr "0.0.0.0" --http.vhosts '*' --ws --ws.port 8546 --ws.addr "0.0.0.0" --ws.origins '*' --http.api web3,eth,txpool --datadir /data --cache 12288

log:

Sep 23 01:19:51 systemd[1]: Stopped Ethereum go client.
Sep 23 03:29:06 systemd[1]: Started Ethereum go client.
Sep 23 03:29:06 geth[19712]: INFO [09-23|03:29:06.916] Starting Geth on Ethereum mainnet...
Sep 23 03:29:06 geth[19712]: INFO [09-23|03:29:06.918] Maximum peer count                       ETH=50 LES=0 total=50
Sep 23 03:29:06 geth[19712]: INFO [09-23|03:29:06.919] Smartcard socket not found, disabling    err="stat /run/pcscd/pcscd.comm: no such file or directory"
Sep 23 03:29:06 geth[19712]: WARN [09-23|03:29:06.919] Found deprecated node list file /data/geth/static-nodes.json, please use the TOML config file instead.
Sep 23 03:29:06 geth[19712]: WARN [09-23|03:29:06.920] Sanitizing cache to Go's GC limits       provided=12288 updated=5181
Sep 23 03:29:06 geth[19712]: INFO [09-23|03:29:06.921] Set global gas cap                       cap=50,000,000
Sep 23 03:29:06 geth[19712]: INFO [09-23|03:29:06.923] Allocated trie memory caches             clean=777.00MiB dirty=1.26GiB
Sep 23 03:29:06 geth[19712]: INFO [09-23|03:29:06.923] Allocated cache and file handles         database=/data/geth/chaindata cache=2.53GiB handles=2048
Sep 23 03:29:11 geth[19712]: INFO [09-23|03:29:11.393] Found legacy ancient chain path          location=/data/geth/chaindata/ancient
Sep 23 03:29:11 geth[19712]: INFO [09-23|03:29:11.394] Opened ancient database                  database=/data/geth/chaindata/ancient readonly=false
Sep 23 03:29:11 geth[19712]: Fatal: Failed to register the Ethereum service: gap (#5734246) in the chain between ancients and leveldb
Sep 23 03:29:11 systemd[1]: geth.service: Main process exited, code=exited, status=1/FAILURE
Sep 23 03:29:11 systemd[1]: geth.service: Failed with result 'exit-code'

[holiman]

Great! Now please also the other thing too:> Could you please provide geth db metadata (if you have any special arguments like --datadir, or --goerli, you need to provide those too).

[Ericalvin]

@holiman when i use geth db metadata --datadir /data , it show this the same with start log

INFO [09-23|05:47:07.745] Maximum peer count                       ETH=50 LES=0 total=50
INFO [09-23|05:47:07.745] Smartcard socket not found, disabling    err="stat /run/pcscd/pcscd.comm: no such file or directory"
WARN [09-23|05:47:07.746] Found deprecated node list file /data/geth/static-nodes.json, please use the TOML config file instead. 
INFO [09-23|05:47:07.746] Set global gas cap                       cap=50,000,000
INFO [09-23|05:47:07.746] Allocated cache and file handles         database=/data/geth/chaindata cache=512.00MiB handles=524,288 readonly=true
INFO [09-23|05:47:10.174] Found legacy ancient chain path          location=/data/geth/chaindata/ancient
INFO [09-23|05:47:10.175] Opened ancient database                  database=/data/geth/chaindata/ancient readonly=true
Fatal: Could not open database: gap (#5734246) in the chain between ancients and leveldb

[holiman]

OK. I have no idea why this occurred. My guess is that the fastest and least painful way to move forward would be to do a fresh sync (clean database via geth --datadir /data removedb).

[holiman]

Note to self, we should apply this diff

diff --git a/core/rawdb/database.go b/core/rawdb/database.go
index 1eaf033bbe..a47d9bf46e 100644
--- a/core/rawdb/database.go
+++ b/core/rawdb/database.go
@@ -240,8 +240,8 @@ func NewDatabaseWithFreezer(db ethdb.KeyValueStore, ancient string, namespace st
                        if kvhash, _ := db.Get(headerHashKey(frozen)); len(kvhash) == 0 {
                                // Subsequent header after the freezer limit is missing from the database.
                                // Reject startup if the database has a more recent head.
-                               if *ReadHeaderNumber(db, ReadHeadHeaderHash(db)) > frozen-1 {
-                                       return nil, fmt.Errorf("gap (#%d) in the chain between ancients and leveldb", frozen)
+                               if ldbNum := *ReadHeaderNumber(db, ReadHeadHeaderHash(db)); ldbNum > frozen-1 {
+                                       return nil, fmt.Errorf("gap in the chain between ancients (#%d) and leveldb (#%d)", frozen, ldbNum)
                                }
                                // Database contains only older data than the freezer, this happens if the
                                // state was wiped and reinited from an existing freezer.

[Ericalvin]

@holiman OK, so i use geth --datadir /data removedb
is this type "y" ? remove full mode?
Remove full node state database (/data/geth/chaindata)? [y/n]

[holiman]

yes, and you can answer yes to all

[Cyberarray]

That should wipe out the blockchain itself and let you sync from scratch. and Also you probably want to do a fast sync afterwards on the chain you can use --fast

[holiman]

Also you probably want to do a fast sync afterwards on the chain you can use --fast

syncmode=fast is not supported in geth anymore. syncmode=snap is default and does not need to be explicitly spelled out.

[Ericalvin]

@holiman ok, it start sync from begin, thank you.
@Cyberarray thanks too.