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IDS Forum

Re: What is DNS Linkage with Informix TCP service/

Posted By: John Miller iii
Date: Wednesday, 20 June 2012, at 5:16 p.m.

In Response To: Re: What is DNS Linkage with Informix TCP service/ (OMER KHAN)

We have seen this behavior a few times and the network endpoint the
listener thread is monitoring can have issues in the operating system. =
The
informix listener thread is not getting errors, but no new connections =
are
happening. To overcomes this problem without shutting down the server=

utilizes informix ability to dynamically restart the tcp listener threa=
ds.
This will not effect currently connected threads, but allows a new netw=
ork
endpoint to be created and in general solves the problem without having=
to
bounce the Informix database server.

onmode -P [start|stop|restart] <servername> dynamic listen thread contr=
ol

Hope this helps,

John F. Miller III
STSM, Embedability Architect
miller3@us.ibm.com
503-578-5645
IBM Informix Dynamic Server (IDS)

ids-bounces@iiug.org wrote on 06/20/2012 09:13:17 AM:

> From: "OMER KHAN" <oskhan@i2cinc.com>
> To: ids@iiug.org,
> Date: 06/20/2012 09:17 AM
> Subject: Re: What is DNS Linkage with Informix TCP service/ [27414]
> Sent by: ids-bounces@iiug.org
>
> Thanks fernando for the answers.
>
> Actually, I have further discussed the case with my system admin andh=
ere
are
> some of the additional information which you might need:
>
> Actually, we uses the external DNS servers (/etc/resolve) and there w=
as
an
> internet outage due to which DB servers were unable to connect to the=
DNS

> servers.
> And that internet outage recovered after 45 minutes and DB servers we=
re
able
> to connect to DNS.
>
> But after above two incidents, our DB instance was not able to make n=
ew
tcp
> connections? why?
>
> We also checked that we were able to ssh our DB servers successfully.=

>
> Although, you made it clear in your earlier answer that if there is a=

change
> in the DNS then we have to restart Informix instance, but in our case=
DNS

> servers were temporary unavailability (we did not make any changes in=

> /etc/resolv.conf & /etc/nsswitch.conf) and after recovery of DNS, dow=
e
still
> require restart?
>
> Additionally, as we are running multiple instance but we faced this i=
ssue
on
> only one instance? And we only restarted one of the instances to fix =
the
> issue?
>
> Why our other instances were not impacted? Any idea?
>
> Look forward for your response. Thanks.
>
>
>
***********************************************************************=
********

> Forum Note: Use "Reply" to post a response in the discussion forum.=

>=

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