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MQSeries.net Forum IndexGeneral IBM MQ SupportMQCONN takes 20 seconds on client

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PaulClarke
PostPosted: Fri Oct 20, 2017 12:44 pm Post subject: Reply with quote

Sentinel

Joined: 17 Nov 2005
Posts: 864
Location: New Zealand

It is surprising that PING primary and Telnet primary shows no delay but MQ sees one. However, at least you know the source (if not the cause) of the problem now.

Good luck.
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Paul Clarke
MQGem Software
www.mqgem.com
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gbaddeley
PostPosted: Sun Oct 22, 2017 4:29 pm Post subject: Reply with quote

Padawan

Joined: 25 Mar 2003
Posts: 1742
Location: Melbourne, Australia

MABeatty1978 wrote:
Now to figure out why it won't resolve....

MQ is calling OS network function getaddrinfo(). Talk to your network or OS support folk.
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Glenn
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zpat
PostPosted: Mon Oct 23, 2017 12:25 am Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5579
Location: UK

Do you use the BlockIP2 exit? That can also have a lot of DNS resolution depending on the rules coded.

Essentially you need to tune your DNS name lookup. Possibly your DNS server has a problem or the local DNS cache is not running.
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Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error.
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fjb_saper
PostPosted: Mon Oct 23, 2017 6:49 am Post subject: Reply with quote

Grand Poobah

Joined: 18 Nov 2003
Posts: 19433
Location: LI,NY

zpat wrote:
Do you use the BlockIP2 exit? That can also have a lot of DNS resolution depending on the rules coded.

Essentially you need to tune your DNS name lookup. Possibly your DNS server has a problem or the local DNS cache is not running.


Please make also sure that reverse DNS lookup has been turned off in the queue manager.

Anyways as for the solution, it might have been better to add the host address to the /etc/hosts table. You could then remove it after your dns problems have been solved without touching mq...

Have fun
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zpat
PostPosted: Mon Oct 23, 2017 6:59 am Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5579
Location: UK

He said it was in the hosts file

Quote:
$MQSERVER = SYSTEM.CLNT.SVRCONN/TCP/primary(2414)

from /etc/hosts
10.50.120.201 primary.company.com primary

I've confirmed the server is 10.50.120.201


So, in theory, it would resolve it. However I would recommend fully qualifying all DNS names - to avoid any risk of an unsuitable default domain name being used.
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Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error.
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