public void OnPeriodicWorkException(IPeriodicWork failedWork, Exception ex, ref IPeriodicWorkExceptionHandler.Feedback feedback)
{
string?disconnectionReason = failedWork switch
{
IPeriodicWork work when work == _headerSyncLoop => "Peer header syncing loop had failures.",
_ => null
};
if (disconnectionReason != null)
{
feedback.ContinueExecution = false;
PeerContext.Disconnect(disconnectionReason);
}
}
private void CheckSyncStallingLocked(BlockHeader bestHeader)
{
// Check for headers sync timeouts
if (_status.IsSynchronizingHeaders && _status.HeadersSyncTimeout < long.MaxValue)
{
long now = _dateTimeProvider.GetTimeMicros();
// Detect whether this is a stalling initial-headers-sync peer
if (bestHeader.TimeStamp <= _dateTimeProvider.GetAdjustedTimeAsUnixTimestamp() - 24 * 60 * 60)
{
bool isTheOnlyPeerSynching = true; //nSyncStarted == 1 && (nPreferredDownload - state.fPreferredDownload >= 1)
if (now > _status.HeadersSyncTimeout && isTheOnlyPeerSynching)
{
// Disconnect a (non-whitelisted) peer if it is our only sync peer,
// and we have others we could be using instead.
// Note: If all our peers are inbound, then we won't
// disconnect our sync peer for stalling; we have bigger
// problems if we can't get any outbound peers.
if (!PeerContext.Permissions.Has(BitcoinPeerPermissions.NOBAN))
{
PeerContext.Disconnect("Timeout downloading headers, disconnecting");
return;
}
else
{
logger.LogDebug("Timeout downloading headers from whitelisted peer {PeerId}, not disconnecting.", PeerContext.PeerId);
// Reset the headers sync state so that we have a
// chance to try downloading from a different peer.
// Note: this will also result in at least one more
// getheaders message to be sent to
// this peer (eventually).
_status.IsSynchronizingHeaders = false;
_status.HeadersSyncTimeout = 0;
}
}
}
else
{
// After we've caught up once, reset the timeout so we can't trigger disconnect later.
_status.HeadersSyncTimeout = long.MaxValue;
}
}
}