Re: [HACKERS] Incomplete startup packet errors

Andrew Dunstan <andrew(dot)dunstan(at)2ndquadrant(dot)com> writes:
> On 3/1/19 6:49 PM, Tom Lane wrote:
>> No patch referenced, but I assume you mean only for the
>> zero-bytes-received case, right? No objection if so.

> Patch proposed by Christoph Berg is here:
> https://www.postgresql.org/message-id/20190228151336.GB7550%40msg.df7cb.de

Meh. That doesn't silence only the zero-bytes case, and I'm also
rather afraid of the fact that it's changing COMMERROR to something
else. I wonder whether (if client_min_messages <= DEBUG1) it could
result in trying to send the error message to the already-lost
connection. It might be that that can't happen, but I think a fair
amount of rather subtle (and breakable) analysis may be needed.

regards, tom lane