When archive_command fails three times, it prints this message into the
logs:
"transaction log file \"%s\" could not be archived: too many failures"
This leaves it open what happens next. What will actually happen is
that it will usually try again after 60 seconds or so, but the message
indicates something much more fatal than that.
Could we rephrase this a little bit to make it less dramatic, like
"... too many failures, will try again later"
?