Re: row merge issue -possible bug
On Wed, Oct 3, 2012 at 5:32 PM, Joan Landry joan.lan...@overturenetworks.com 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..2.11.1.2.1.1.11.1 1.3.6.1.4.1..2.11.1.2.1.1.10.1 SNMPv2-SMI::enterprises..2.11.1.2.3.1.2.1 = STRING: Main board SNMPv2-SMI::enterprises..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..2.11.1.2.1.1.10.1 1.3.6.1.4.1..2.11.1.2.1.1.11.1 SNMPv2-SMI::enterprises..2.11.1.2.1.1.11.1 = SNMPv2-SMI::enterprises..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 Net-snmp-users@lists.sourceforge.net 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 Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
RE: row merge issue -possible bug
Thanks for this - this did make the problem go away - however this is not a workable solution since this serializes every oid per input packet. Does anyone know if there is a solution that does not require the overhead of serializing every oid in a packet? Have you reported this as a bug? If not can someone tell me how to raise this issue to the net-snmp code developers? Thanks -Original Message- From: Bill Fenner [mailto:fen...@gmail.com] Sent: Thursday, October 04, 2012 10:12 AM To: Joan Landry Cc: net-snmp-users@lists.sourceforge.net Subject: Re: row merge issue -possible bug On Wed, Oct 3, 2012 at 5:32 PM, Joan Landry joan.lan...@overturenetworks.com 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..2.11.1.2.1.1.11.1 1.3.6.1.4.1..2.11.1.2.1.1.10.1 SNMPv2-SMI::enterprises..2.11.1.2.3.1.2.1 = STRING: Main board SNMPv2-SMI::enterprises..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..2.11.1.2.1.1.10.1 1.3.6.1.4.1..2.11.1.2.1.1.11.1 SNMPv2-SMI::enterprises..2.11.1.2.1.1.11.1 = SNMPv2-SMI::enterprises..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 Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users 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
Re: row merge issue -possible bug
On Thu, Oct 4, 2012 at 4:28 PM, Joan Landry joan.lan...@overturenetworks.com wrote: Thanks for this - this did make the problem go away - however this is not a workable solution since this serializes every oid per input packet. Does anyone know if there is a solution that does not require the overhead of serializing every oid in a packet? Have you reported this as a bug? We haven't; due to the structure of our code it was hard to provide a replication case, and the serialization handler was acceptable overhead to us. If not can someone tell me how to raise this issue to the net-snmp code developers? http://www.net-snmp.org/bugs/ Bill Thanks -Original Message- From: Bill Fenner [mailto:fen...@gmail.com] Sent: Thursday, October 04, 2012 10:12 AM To: Joan Landry Cc: net-snmp-users@lists.sourceforge.net Subject: Re: row merge issue -possible bug On Wed, Oct 3, 2012 at 5:32 PM, Joan Landry joan.lan...@overturenetworks.com 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..2.11.1.2.1.1.11.1 1.3.6.1.4.1..2.11.1.2.1.1.10.1 SNMPv2-SMI::enterprises..2.11.1.2.3.1.2.1 = STRING: Main board SNMPv2-SMI::enterprises..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..2.11.1.2.1.1.10.1 1.3.6.1.4.1..2.11.1.2.1.1.11.1 SNMPv2-SMI::enterprises..2.11.1.2.1.1.11.1 = SNMPv2-SMI::enterprises..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 Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users 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
