Re: [SNMP4J] net-snmp and snmp4j agentx
Hi Frank, I built net-snmp 5.5.1 and tried it...it worked fine. Thanks for your assistance. :-) Regards, Rob On 6/7/2012 9:44 AM, Rob Morton wrote: Hi Frank, I will upgrade to net-snmp 5.5 and try it with that version. Thank you :-) Regards, Rob On 6/6/2012 5:51 PM, Frank Fock wrote: Hi Rob, Bad news, it seems that this is simply a memory allocation bug in NET-SNMP. NET-SNMP 5.0.9 is very old and there are a lot of fixes regarding AgentX in newer versions. Are you able to upgrade? Best regards, Frank Am 06.06.2012 19:43, schrieb Rob Morton: Hi Frank, First, thank you very much for looking into this issue. It is very much appreciated. Second, I have attached a master agent log(I use log4j too and had to connect in your logsnmp4jfactory)...it shows the agent starting up and the log messages generated as a result of the net-snmp starting up and connecting then registering its MIB regions...later in the log...it then reflects DEBUG info when I send in the snmpget for the ifNumber OID as stated earlier in this email thread. I removed my server's log entries as best I could but there might still be a few entries reflecting my code...it will be prefixed with com.alcatel.tpapps.* Thanks, Rob On 6/6/2012 11:55 AM, Frank Fock wrote: Hi Rob, The log of the sub-agent shows, that there is probably a region issue. To get the root cause, the log of the master agent is very important. It is likely, that we can find a workaround for that issue. NET-SNMP cannot handle big sub OIDs (between 2^31 and 2^32-1) in registrations/requests correctly in all situations. Best regards, Frank Am 06.06.2012 15:47, schrieb Rob Morton: Hi Frank, Thank you for responding... Here are the details of the issue I'm facing: * I am using net-snmp v5.0.9 on Solaris 10 configured as a sub-agent to my AgentXMasterAgent-based master agent via the command: /usr/sfw/sbin/snmpd -X -DALL * with /etc/sma/snmp/snmpd.conf having the following entries: #to avoid re-registrations when I suspend the master agent's threads in IntelliJ's debugger agentxPingInterval 6 agentXSocket tcp:localhost:1705 * I have no issues with connection nor registration...I have attached a SNMP walk of the master in which I grep'd for agentx to observe what was registered by the sub-agent (see attached snmpwalk-grepedForAgentX.log)...I used the following command: /usr/sfw/bin/snmpwalk -v2c -ccommunity string-M /etc/sma/snmp/mibs -m ALL host IP@ 1 | grep agentx /opt/snmpwalk-grepedForAgentX.log * now.../_the problem_/...It is as follows...I am sending in a simple snmp get request to my master snmp agent (for an OID managed by the net-snmp sub-agent) with the following command: /usr/sfw/bin/snmpget -v2c -ccommunity string -r 0 -t 60 host IP@ 1.3.6.1.2.1.2.1.0 -- this OID is IF-MIB::ifNumber.0 * to which I receive the following response: IF-MIB::ifNumber.0 = No Such Object available on this agent at this OID --THE PROBLEM * I have attached the net-snmp debug log (see attached snmpd.log) for the above SNMP get request. * if I send in a simple get for an OID managed by the master locally, I have no issue: /usr/sfw/bin/snmpget -r 0 -t 600 -v2c -ccommunity stringhost IP@sysContact.0 SNMPv2-MIB::sysContact.0 = STRING: bob * I don't currently have a log for the master agent (I have issues linking in the log4j with my code base...am working on it) _but_ I have stepped through the code extensively and observed no exceptions or strange code paths for this request...it simply assesses that it must send a GET PDU to the sub-agent and does just that...I have also verified each byte in the encoded PDU...it all looks good. If more info is required please don't hesitate to ask. Thank you, Rob On 6/6/2012 5:39 AM, Frank Fock wrote: Hi Rob, With the NET-SNMP AgentX master and sub-agents several issues are known. Any of those, are caused by NET-SNMP's incorrect registration algorithms or simply other bugs which are not fixed for years now. For several issues there exists workarounds. So if you are using NET-SNMP as a subagent to SNMP4J-AgentX, nearly everythin should work. You can search for NET-SNMP in the sources of SNMP4J-AgentX to locate the various workarounds. We could probably better help, if you provide more details on the problem (master log output of the failed request as well as subagent output, also who is master and who subagent, etc.) Best regards, Frank Am 06.06.2012 02:03, schrieb Rob Morton: Hi, What version(s) of net-snmp are supported by snmp4j's agentxv2.1.0? I ask because I am getting peculiar 'get' failures on Solaris's net-snmpv5.0.9. I get these errors after successful connection, registration, pings, etc...I perform an snmpget on IF-MIB::ifNumber.0 (just an example) and get
Re: [SNMP4J] net-snmp and snmp4j agentx
Hi Rob, With the NET-SNMP AgentX master and sub-agents several issues are known. Any of those, are caused by NET-SNMP's incorrect registration algorithms or simply other bugs which are not fixed for years now. For several issues there exists workarounds. So if you are using NET-SNMP as a subagent to SNMP4J-AgentX, nearly everythin should work. You can search for NET-SNMP in the sources of SNMP4J-AgentX to locate the various workarounds. We could probably better help, if you provide more details on the problem (master log output of the failed request as well as subagent output, also who is master and who subagent, etc.) Best regards, Frank Am 06.06.2012 02:03, schrieb Rob Morton: Hi, What version(s) of net-snmp are supported by snmp4j's agentxv2.1.0? I ask because I am getting peculiar 'get' failures on Solaris's net-snmpv5.0.9. I get these errors after successful connection, registration, pings, etc...I perform an snmpget on IF-MIB::ifNumber.0 (just an example) and get IF-MIB::ifNumber.0 = No Such Object available on this agent at this OID This OID region is indeed registered. Thanks, Rob ___ SNMP4J mailing list SNMP4J@agentpp.org http://lists.agentpp.org/mailman/listinfo/snmp4j -- --- AGENT++ Maximilian-Kolbe-Str. 10 73257 Koengen, Germany https://agentpp.com Phone: +49 7024 8688230 Fax: +49 7024 8688231 ___ SNMP4J mailing list SNMP4J@agentpp.org http://lists.agentpp.org/mailman/listinfo/snmp4j
Re: [SNMP4J] net-snmp and snmp4j agentx
Hi Rob, The log of the sub-agent shows, that there is probably a region issue. To get the root cause, the log of the master agent is very important. It is likely, that we can find a workaround for that issue. NET-SNMP cannot handle big sub OIDs (between 2^31 and 2^32-1) in registrations/requests correctly in all situations. Best regards, Frank Am 06.06.2012 15:47, schrieb Rob Morton: Hi Frank, Thank you for responding... Here are the details of the issue I'm facing: * I am using net-snmp v5.0.9 on Solaris 10 configured as a sub-agent to my AgentXMasterAgent-based master agent via the command: /usr/sfw/sbin/snmpd -X -DALL * with /etc/sma/snmp/snmpd.conf having the following entries: #to avoid re-registrations when I suspend the master agent's threads in IntelliJ's debugger agentxPingInterval 6 agentXSocket tcp:localhost:1705 * I have no issues with connection nor registration...I have attached a SNMP walk of the master in which I grep'd for agentx to observe what was registered by the sub-agent (see attached snmpwalk-grepedForAgentX.log)...I used the following command: /usr/sfw/bin/snmpwalk -v2c -ccommunity string-M /etc/sma/snmp/mibs -m ALL host IP@ 1 | grep agentx /opt/snmpwalk-grepedForAgentX.log * now.../_the problem_/...It is as follows...I am sending in a simple snmp get request to my master snmp agent (for an OID managed by the net-snmp sub-agent) with the following command: /usr/sfw/bin/snmpget -v2c -ccommunity string -r 0 -t 60 host IP@ 1.3.6.1.2.1.2.1.0 -- this OID is IF-MIB::ifNumber.0 * to which I receive the following response: IF-MIB::ifNumber.0 = No Such Object available on this agent at this OID --THE PROBLEM * I have attached the net-snmp debug log (see attached snmpd.log) for the above SNMP get request. * if I send in a simple get for an OID managed by the master locally, I have no issue: /usr/sfw/bin/snmpget -r 0 -t 600 -v2c -ccommunity stringhost IP@sysContact.0 SNMPv2-MIB::sysContact.0 = STRING: bob * I don't currently have a log for the master agent (I have issues linking in the log4j with my code base...am working on it) _but_ I have stepped through the code extensively and observed no exceptions or strange code paths for this request...it simply assesses that it must send a GET PDU to the sub-agent and does just that...I have also verified each byte in the encoded PDU...it all looks good. If more info is required please don't hesitate to ask. Thank you, Rob On 6/6/2012 5:39 AM, Frank Fock wrote: Hi Rob, With the NET-SNMP AgentX master and sub-agents several issues are known. Any of those, are caused by NET-SNMP's incorrect registration algorithms or simply other bugs which are not fixed for years now. For several issues there exists workarounds. So if you are using NET-SNMP as a subagent to SNMP4J-AgentX, nearly everythin should work. You can search for NET-SNMP in the sources of SNMP4J-AgentX to locate the various workarounds. We could probably better help, if you provide more details on the problem (master log output of the failed request as well as subagent output, also who is master and who subagent, etc.) Best regards, Frank Am 06.06.2012 02:03, schrieb Rob Morton: Hi, What version(s) of net-snmp are supported by snmp4j's agentxv2.1.0? I ask because I am getting peculiar 'get' failures on Solaris's net-snmpv5.0.9. I get these errors after successful connection, registration, pings, etc...I perform an snmpget on IF-MIB::ifNumber.0 (just an example) and get IF-MIB::ifNumber.0 = No Such Object available on this agent at this OID This OID region is indeed registered. Thanks, Rob ___ SNMP4J mailing list SNMP4J@agentpp.org http://lists.agentpp.org/mailman/listinfo/snmp4j -- --- AGENT++ Maximilian-Kolbe-Str. 10 73257 Koengen, Germany https://agentpp.com Phone: +49 7024 8688230 Fax: +49 7024 8688231 ___ SNMP4J mailing list SNMP4J@agentpp.org http://lists.agentpp.org/mailman/listinfo/snmp4j
Re: [SNMP4J] net-snmp and snmp4j agentx
Hi Rob, Bad news, it seems that this is simply a memory allocation bug in NET-SNMP. NET-SNMP 5.0.9 is very old and there are a lot of fixes regarding AgentX in newer versions. Are you able to upgrade? Best regards, Frank Am 06.06.2012 19:43, schrieb Rob Morton: Hi Frank, First, thank you very much for looking into this issue. It is very much appreciated. Second, I have attached a master agent log(I use log4j too and had to connect in your logsnmp4jfactory)...it shows the agent starting up and the log messages generated as a result of the net-snmp starting up and connecting then registering its MIB regions...later in the log...it then reflects DEBUG info when I send in the snmpget for the ifNumber OID as stated earlier in this email thread. I removed my server's log entries as best I could but there might still be a few entries reflecting my code...it will be prefixed with com.alcatel.tpapps.* Thanks, Rob On 6/6/2012 11:55 AM, Frank Fock wrote: Hi Rob, The log of the sub-agent shows, that there is probably a region issue. To get the root cause, the log of the master agent is very important. It is likely, that we can find a workaround for that issue. NET-SNMP cannot handle big sub OIDs (between 2^31 and 2^32-1) in registrations/requests correctly in all situations. Best regards, Frank Am 06.06.2012 15:47, schrieb Rob Morton: Hi Frank, Thank you for responding... Here are the details of the issue I'm facing: * I am using net-snmp v5.0.9 on Solaris 10 configured as a sub-agent to my AgentXMasterAgent-based master agent via the command: /usr/sfw/sbin/snmpd -X -DALL * with /etc/sma/snmp/snmpd.conf having the following entries: #to avoid re-registrations when I suspend the master agent's threads in IntelliJ's debugger agentxPingInterval 6 agentXSocket tcp:localhost:1705 * I have no issues with connection nor registration...I have attached a SNMP walk of the master in which I grep'd for agentx to observe what was registered by the sub-agent (see attached snmpwalk-grepedForAgentX.log)...I used the following command: /usr/sfw/bin/snmpwalk -v2c -ccommunity string-M /etc/sma/snmp/mibs -m ALL host IP@ 1 | grep agentx /opt/snmpwalk-grepedForAgentX.log * now.../_the problem_/...It is as follows...I am sending in a simple snmp get request to my master snmp agent (for an OID managed by the net-snmp sub-agent) with the following command: /usr/sfw/bin/snmpget -v2c -ccommunity string -r 0 -t 60 host IP@ 1.3.6.1.2.1.2.1.0 -- this OID is IF-MIB::ifNumber.0 * to which I receive the following response: IF-MIB::ifNumber.0 = No Such Object available on this agent at this OID --THE PROBLEM * I have attached the net-snmp debug log (see attached snmpd.log) for the above SNMP get request. * if I send in a simple get for an OID managed by the master locally, I have no issue: /usr/sfw/bin/snmpget -r 0 -t 600 -v2c -ccommunity stringhost IP@sysContact.0 SNMPv2-MIB::sysContact.0 = STRING: bob * I don't currently have a log for the master agent (I have issues linking in the log4j with my code base...am working on it) _but_ I have stepped through the code extensively and observed no exceptions or strange code paths for this request...it simply assesses that it must send a GET PDU to the sub-agent and does just that...I have also verified each byte in the encoded PDU...it all looks good. If more info is required please don't hesitate to ask. Thank you, Rob On 6/6/2012 5:39 AM, Frank Fock wrote: Hi Rob, With the NET-SNMP AgentX master and sub-agents several issues are known. Any of those, are caused by NET-SNMP's incorrect registration algorithms or simply other bugs which are not fixed for years now. For several issues there exists workarounds. So if you are using NET-SNMP as a subagent to SNMP4J-AgentX, nearly everythin should work. You can search for NET-SNMP in the sources of SNMP4J-AgentX to locate the various workarounds. We could probably better help, if you provide more details on the problem (master log output of the failed request as well as subagent output, also who is master and who subagent, etc.) Best regards, Frank Am 06.06.2012 02:03, schrieb Rob Morton: Hi, What version(s) of net-snmp are supported by snmp4j's agentxv2.1.0? I ask because I am getting peculiar 'get' failures on Solaris's net-snmpv5.0.9. I get these errors after successful connection, registration, pings, etc...I perform an snmpget on IF-MIB::ifNumber.0 (just an example) and get IF-MIB::ifNumber.0 = No Such Object available on this agent at this OID This OID region is indeed registered. Thanks, Rob ___ SNMP4J mailing list SNMP4J@agentpp.org http://lists.agentpp.org/mailman/listinfo/snmp4j -- --- AGENT++ Maximilian-Kolbe-Str. 10 73257 Koengen, Germany
