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MQSeries.net Forum Index » General IBM MQ Support » TCP/IP Errors

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aboggis
PostPosted: Wed Sep 29, 2004 8:09 am    Post subject: TCP/IP Errors Reply with quote

Centurion

Joined: 18 Dec 2001
Posts: 105
Location: Auburn, California

Env: Solaris 5.8, WMQ 5.3 (CSD05).

I have been seeing recurring instances of TCP/IP errors being logged on my queue managers:

Code:
-------------------------------------------------------------------------------
09/29/04  03:30:39 PM
AMQ9213: A communications error for TCP/IP occurred.

EXPLANATION:
An unexpected error occurred in communications.
ACTION:
The return code from the TCP/IP(select) [TIMEOUT] 10 seconds call was 11
(X'B'). Record these values and tell the systems administrator.
----- amqccita.c : 3075 -------------------------------------------------------
09/29/04  03:30:39 PM
AMQ9999: Channel program ended abnormally.

EXPLANATION:
Channel program 'TO.AR1' ended abnormally.
ACTION:
Look at previous error messages for channel program 'TO.AR1' in the error files
to determine the cause of the failure.
----- amqrmrsa.c : 467 --------------------------------------------------------


According to the docs I can find, the error 11 equates to "EAGAIN" or "No more processes". However, I do not have any events logged in system level files.

Has anyone else seen this with any frequency? Is there anyway to link these MQ errors to system events?
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Anirud
PostPosted: Wed Sep 29, 2004 8:39 am    Post subject: Reply with quote

Master

Joined: 12 Feb 2004
Posts: 285
Location: Vermont

If there are client connections to the server and if they exit using Ctrl C, that might cause this error.
I have seen this error in /var/mqm/qmgrs/QMGR/errors and I didn't have any problems with MQ until now (touch wood).
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aboggis
PostPosted: Wed Sep 29, 2004 8:47 am    Post subject: Reply with quote

Centurion

Joined: 18 Dec 2001
Posts: 105
Location: Auburn, California

No client connections. All applications that connect/use MQ run local and use direct server bindings.

The channel connections are to other cluster queue managers.
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sjensen
PostPosted: Thu Sep 30, 2004 1:21 am    Post subject: Reply with quote

Centurion

Joined: 18 Dec 2003
Posts: 134
Location: London

Hi.

The EAGAIN can also be thrown if the TCP module
detects a checksum error:

http://sunsolve.sun.com/search/document.do?assetkey=1-25-50664-1

So a network glitch could also cause this error.

Cheers
Stefan
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aboggis
PostPosted: Thu Sep 30, 2004 7:32 am    Post subject: Reply with quote

Centurion

Joined: 18 Dec 2001
Posts: 105
Location: Auburn, California

Thanks for that Stefan.
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Shalini
PostPosted: Fri Oct 29, 2004 12:42 am    Post subject: Reply with quote

Master

Joined: 30 Apr 2002
Posts: 224
Location: India

Hi,

How do you know that 11 (X'B') corresponds to "EAGAIN" any link, please let me know

I searched in google giving 11 (X'B') but could not get any help.

Quote:
The return code from the TCP/IP(select) [TIMEOUT] 10 seconds call was 11 (X'B')


Quote:
According to the docs I can find, the error 11 equates to "EAGAIN" or "No more processes".
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sjensen
PostPosted: Fri Oct 29, 2004 1:14 am    Post subject: Reply with quote

Centurion

Joined: 18 Dec 2003
Posts: 134
Location: London

Hi,

Quote:
How do you know that 11 (X'B') corresponds to "EAGAIN"


On Solaris the codes are in /usr/include/sys/errno.h:

# grep 11 /usr/include/sys/errno.h
#pragma ident "@(#)errno.h 1.20 00/02/14 SMI" /* SVr4.0 11.18 */
#define EAGAIN 11 /* Resource temporarily unavailable */

Cheers
Stefan
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