MAINNET: node.sh panics

[mindstyle85]

Describe the bug

OS: ubuntu 18.04 64bit
node.sh: version: v1 20200327.0

[gupadhyaya]

if currentBlock == nil {
		// Corrupt or empty database, init from scratch
		utils.Logger().Warn().Str("hash", head.Hex()).Msg("Head block missing, resetting chain")
		return bc.Reset()

exploding in return bc.Reset(), which can be fixed, @mindstyle85 did you try cleaning db?

[mindstyle85]

hmm thats odd, it happened on a FN runner that just downloaded db via rclone, so only possibility is the snapshots were corrupted? I will check with him though and ask him to re-download the snapshots @gupadhyaya

[mindstyle85]

confirmed it was a db problem, looks like the rclone copy yesterday was bad

im guessing it should still not explode right, but rather give out an error message and shut down?

[gupadhyaya]

@mindstyle85 yes, this is also observed in go-ethereum: ethereum/go-ethereum#19286. Will port their fix that initializes the currentBlock and currentFastBlock atomic to nil block of right type.

[mindstyle85]

sure @gupadhyaya once the fix is ported in you can close this one, will be hard to check unless we corrupt db on purpose hehe