Re: row merge issue -possible bug

On Wed, Oct 3, 2012 at 5:32 PM, Joan Landry
<[email protected]> wrote:
> I am seeing an issue (possible bug) in the code where a getnext row merge results in the wrong result. Code uses row_merge helpers.
>
> Does the incoming request need to be sequentially numbered oid's to work or is this a bug in net-snmp?
>
> This fails to get the correct result:
> snmpgetnext -c public -v 2c x.x.x.x
> 1.3.6.1.4.1.4444.2.11.1.2.1.1.11.1
> 1.3.6.1.4.1.4444.2.11.1.2.1.1.10.1
>
> SNMPv2-SMI::enterprises.4444.2.11.1.2.3.1.2.1 = STRING: "Main board"
> SNMPv2-SMI::enterprises.4444.2.11.1.2.3.1.2.1 = STRING: "Main board"
>
> This works:
>
> snmpgetnext -c public -v 2c x.x.x.x
> 1.3.6.1.4.1.4444.2.11.1.2.1.1.10.1
> 1.3.6.1.4.1.4444.2.11.1.2.1.1.11.1
>
> SNMPv2-SMI::enterprises.4444.2.11.1.2.1.1.11.1 = ""
> SNMPv2-SMI::enterprises.4444.2.11.1.2.3.1.2.1 = STRING: "Main board"

Disclaimer: I know *nothing* about the row_merge helper.

When using table_iterator, we found that it would mishandle multiple
requests in ordered tables, if the requests were ordered "backwards"
as you found.  E.g.,

snmpget -v 2c -c public blue ifInOctets.43 ifInOctets.44
IF-MIB::ifInOctets.43 = Counter32: 483792666
IF-MIB::ifInOctets.44 = Counter32: 1470706044

vs.

snmpget -v 2c -c public blue ifInOctets.44 ifInOctets.43
IF-MIB::ifInOctets.44 = Counter32: 1474004919
IF-MIB::ifInOctets.43 = No Such Instance currently exists at this OID

We found that injecting the netsnmp_get_serialize_handler resolved our
problem.  Again, I know nothing about the row_merge helper, so I don't
know if injecting the serialize handler is a significant performance
hit for you.

  Bill

>
>
>
> This email and attachments may contain privileged or confidential information intended only for the addressee(s) indicated. The sender does not waive any of its rights, privileges or protections respecting this information. If you are not the named addressee, an employee, or agent responsible for sending this message to the named addressee (or this message was received by mistake), you are not authorized to read, print, retain, copy or disseminate this message or any part of it. If received in error, please notify us immediately by e-mail, discard any paper copies and delete all electronic files of the email.
>
> Computer viruses can be transmitted via email. The recipient should check this email and any attachments for viruses. Email transmission cannot be guaranteed to be secured or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender accepts no liability for any damage caused by any transmitted viruses or errors or omissions in the contents of this message.
>
> Overture Networks, Inc. 637 Davis Drive, Morrisville, NC USA 27560 www.overturenetworks.com
>
> ------------------------------------------------------------------------------
> Don't let slow site performance ruin your business. Deploy New Relic APM
> Deploy New Relic app performance management and know exactly
> what is happening inside your Ruby, Python, PHP, Java, and .NET app
> Try New Relic at no cost today and get our sweet Data Nerd shirt too!
> http://p.sf.net/sfu/newrelic-dev2dev
> _______________________________________________
> Net-snmp-users mailing list
> [email protected]
> Please see the following page to unsubscribe or change other options:
> https://lists.sourceforge.net/lists/listinfo/net-snmp-users

------------------------------------------------------------------------------
Don't let slow site performance ruin your business. Deploy New Relic APM
Deploy New Relic app performance management and know exactly
what is happening inside your Ruby, Python, PHP, Java, and .NET app
Try New Relic at no cost today and get our sweet Data Nerd shirt too!
http://p.sf.net/sfu/newrelic-dev2dev
_______________________________________________
Net-snmp-users mailing list
[email protected]
Please see the following page to unsubscribe or change other options:
https://lists.sourceforge.net/lists/listinfo/net-snmp-users