Indeed those messages appear when the client closes the socket connection only.
Npgsql has connection pooling and if the app domain is unloaded and
there are connections in the pool, those connections don't get a
chance to have the Close message sent to backend server.
So, even when you are correctly closing your connection, you still
will see those messages.
You can prevent that from appearing by disabling the connection
pooling. Which I advise against.
Also, you may want to check if your domain app is being unloaded for
some reason.
I never see any harm being done because the connection exited without
sending the close message. So I think you could (safely?) ignore this
message on this case.
I hope it helps.
On Tue, Mar 8, 2011 at 05:50, rsmogura <rsmogura@softperience.eu> wrote:
> On Tue, 08 Mar 2011 11:30:10 +0800, Craig Ringer wrote:
>>
>> On 08/03/11 02:49, Piotr Czekalski wrote:
>>
>>> I've checked and verified that all connections are closed within the
>>> code, what's more, the problem has appeared just as I've moved server
>>> from Fedora Linux x86_64 running Postgres 8.4.2 to the Windows and 9.0.3
>>> (details above) thus I conclude this is not a client problem indeed (the
>>> failure didn't occure on Linux).
>>
>> Windows firewall?
>>
>> You can also see these error reports when the connections are closed
>> uncleanly, without a proper backend close message. Perhaps you have
>> client processes crashing? Or doing hard shutdowns where the client code
>> doesn't get a chance to run any cleanup/dtors/etc?
>>
>> --
>> Craig Ringer
>
> I think in 8.x releases is no need to make any spacial close operation, or
> at least You do not get notice, about it. Closing socket is enough. E.g.
> JDBC driver closes connection, by closing socket. In 9 this changed and I
> see many of such notices in log. Probably Your driver, as many others, is
> written to close socket without backanad message.
>
> Regards,
> Radek
>
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--
Regards,
Francisco Figueiredo Jr.
Npgsql Lead Developer
http://www.npgsql.org
http://fxjr.blogspot.com
http://twitter.com/franciscojunior
