acme-client failed for me several times with:
acme-client: transfer buffer: [{
"type": "urn:ietf:params:acme:error:conflict",
"detail": "Unable to update challenge :: failed to mark authz as
processing: Authorization is already being validated.
This may indicate your client attempted the same challenge multiple times,
possibly due to a client bug.",
"status": 409
}] (296 bytes)
acme-client: bad exit: netproc(24709): 1
This was on a domain with 8 alternate names, where I was triggering a
renewal after adding the last two.
My impression is that if the validation is pending, acme-client sleeps
RETRY_DELAY, and then POSTs to the same challenge URL again. This second
POST to the same URL is where the server (letsencrypt/Boulder) returns
409.
The process dies at this point, and I need to retry until the validation
takes less than 5 seconds.
--
Hugo
