CLN 24.05 kinda broken, can't send funds out

[ndeet]

Steps to reproduce:

• Open 1 channel with LNBIG
• create invoices and pay -> works
• open RTL and try to send a fraction of it (to not run into reserve restriction) -> error

Error in RTL:

500 - {"code":210,"message":"destination 027fffce2833bf834935cac44740b2055e53df4bbf25a443c3b941347f2bfa5dfc Is Not Reachable Directly And All Routehints Were Unusable.","attempts":[{"status":"failed","failreason":"destination 027fffce2833bf834935cac44740b2055e53df4bbf25a443c3b941347f2bfa5dfc Is Not Reachable Directly And All Routehints Were Unusable.","partid":0,"amount_msat":1111000}]}

But the route works as you can receive funds over that same channel.

On CLN logs it seems to hang at a specific block which might be the root of the issue?

2024-07-27T11:03:12.906Z UNUSUAL plugin-bcli: bitcoin-cli -datadir=/etc/bitcoin -rpcclienttimeout=60 -rpcconnect=bitcoind getblock 00000000000000000005f7a06bd4efe545999aba00eeff9a49747a3cd1f3c9df 0 exited with status 1
2024-07-27T11:03:25.091Z UNUSUAL plugin-bcli: bitcoin-cli -datadir=/etc/bitcoin -rpcclienttimeout=60 -rpcconnect=bitcoind getblock 00000000000000000005f7a06bd4efe545999aba00eeff9a49747a3cd1f3c9df 0 exited with status 1
2024-07-27T11:03:37.258Z UNUSUAL plugin-bcli: bitcoin-cli -datadir=/etc/bitcoin -rpcclienttimeout=60 -rpcconnect=bitcoind getblock 00000000000000000005f7a06bd4efe545999aba00eeff9a49747a3cd1f3c9df 0 exited with status 1
2024-07-27T11:03:49.418Z UNUSUAL plugin-bcli: bitcoin-cli -datadir=/etc/bitcoin -rpcclienttimeout=60 -rpcconnect=bitcoind getblock 00000000000000000005f7a06bd4efe545999aba00eeff9a49747a3cd1f3c9df 0 exited with status 1
2024-07-27T11:04:01.591Z UNUSUAL plugin-bcli: bitcoin-cli -datadir=/etc/bitcoin -rpcclienttimeout=60 -rpcconnect=bitcoind getblock 00000000000000000005f7a06bd4efe545999aba00eeff9a49747a3cd1f3c9df 0 exited with status 1
2024-07-27T11:04:13.769Z UNUSUAL plugin-bcli: bitcoin-cli -datadir=/etc/bitcoin -rpcclienttimeout=60 -rpcconnect=bitcoind getblock 00000000000000000005f7a06bd4efe545999aba00eeff9a49747a3cd1f3c9df 0 exited with status 1

Other user reported the same stuck block on Telegram.

# bitcoin-lightning-cli.sh getchaininfo
{
   "chain": "main",
   "headercount": 854177,
   "blockcount": 854177,
   "ibd": false
}

[bashmeester]

@ndeet is the btc node pruned in your setup?

I am considering deleting the blockchain so it can resync, and CLN should eventually get the needed block when it becomes available.

[ndeet]

Hey @bashmeester yes it is. After discussing with Kukks it that the block is not the problem (it showed that warning also when sending was working) but some other issue that needs to be found and fixed.