Re: (ITS#5133) Synchronous replication on slave doesn't notice lost network connection

[ando@sys-net.it]

audrius.valunas@teo.lt wrote:

> There is synchronous replication between mastyer and slave. When network
> connectivity problems occur master closes tcp connection but slave doesn't
> notice those problems, it still has tcp connection open, but in real it is not
> receiving updates any more.
> I think that can be solved adding some ack from slave because sending on such a
> socket would fail and force slave to retry connection.

Well, this should already be taken into consideration by SO_KEEPALIVE,
which is always set when available on all connections.  I concur that it
usually requires quite a long time before a connection is actually
checked (usually more than 2 hours), so some better policy could be put
in place.

p.



Ing. Pierangelo Masarati
OpenLDAP Core Team

SysNet s.r.l.
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