I get a warning in Geth that I was not able to find any information on:

Checkpoint challenge timed out, dropping

What does this mean?

  • 2
    Which version of geth are you using?
    – Ha ĐANG
    Aug 7, 2019 at 15:38

1 Answer 1


In geth's code you'll find the snippet bellow https://github.com/ethereum/go-ethereum/blob/master/eth/handler.go

// Start a timer to disconnect if the peer doesn't reply in time
        p.syncDrop = time.AfterFunc(syncChallengeTimeout, func() {
            p.Log().Warn("Checkpoint challenge timed out, dropping", "addr", p.RemoteAddr(), "type", p.Name())

The comment explain what the log message means

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