Hi Dave,
Thanks for the reply, I am running the agent on Linux with
kernel version 2.6.21.1
Yes, it always fails at the same point i. e whenever I make a getsubtree/get
bulk/table request on the udptable.
Here are my observations,
I am using the iReasoning MIB browser on windows for these tests.
1. Getbulk request --Segfaults without giving any results
//output on the node
Cannot find module (TUNNEL-MIB): At line 0 in (none)
Cannot find module (IPV6-FLOW-LABEL-MIB): At line 0 in (none)
Turning on AgentX master support.
NET-SNMP version 5.4.2.1
No pgpgin line in /proc/vmstat
No pgpgout line in /proc/vmstat
No pswpin line in /proc/vmstat
No pswpout line in /proc/vmstat
Segmentation fault (core dumped)
2.GetSubtree/walk -segfaults with the following results in result table and
"snmp request timed out" msg
udpLocalAddress.0.0.0.0.53 0.0.0.0 IpAddress
udpLocalAddress.0.0.0.0.67 0.0.0.0 IpAddress
udpLocalAddress.0.0.0.0.123 0.0.0.0 IpAddress
udpLocalAddress.0.0.0.0.161 0.0.0.0 IpAddress
udpLocalAddress.0.0.0.0.709 0.0.0.0 IpAddress
udpLocalAddress.0.0.0.0.32769 0.0.0.0 IpAddress
udpLocalAddress.127.0.0.1.123 127.0.0.1 IpAddress
udpLocalAddress.134.56.72.221.123 134.56.72.221 IpAddress
udpLocalPort.0.0.0.0.53 53 Integer
udpLocalPort.0.0.0.0.67 67 Integer
udpLocalPort.0.0.0.0.123 123 Integer
udpLocalPort.0.0.0.0.161 161 Integer
udpLocalPort.0.0.0.0.709 709 Integer
udpLocalPort.0.0.0.0.32769 32769 Integer
udpLocalPort.127.0.0.1.123 123 Integer
udpLocalPort.134.56.72.221.123 123 Integer
//output on the node
Cannot find module (TUNNEL-MIB): At line 0 in (none)
Cannot find module (IPV6-FLOW-LABEL-MIB): At line 0 in (none)
Turning on AgentX master support.
NET-SNMP version 5.4.2.1
No pgpgin line in /proc/vmstat
No pgpgout line in /proc/vmstat
No pswpin line in /proc/vmstat
No pswpout line in /proc/vmstat
Segmentation fault (core dumped)
3. GetTable-wont segfault, but wont give any results and after a while we see
the message"Failed to connect to SNMP agent" on the browser and the agent
becomes unresponsive afterwords.
As a side note I would like to mention, these observations are visible only
when I dont use the "dev/null" when I start snmpd something like
"/usr/sbin/snmpd -Lo -p /var/run/snmpd.pid -f
-I-ifTable"
When I use "/usr/sbin/snmpd -Lf /dev/null -p /var/run/snmpd.pid
-I-ifTable" agent , as we dont see any output, agent simply becomes
unresponsive.
Please let me know if more details are needed.
Thanks and Regards,
Malathi
________________________________
From: Dave Shield <[email protected]>
To: Malathi Panyam <[email protected]>
Cc: [email protected]
Sent: Tue, March 30, 2010 12:11:25 AM
Subject: Re: Seg fault when querying for the UDP table
On 30 March 2010 01:28, Malathi Panyam <[email protected]> wrote:
> When I try to query the UDP table using "getsubtree" or "walk" or
> "Table" under MIB-II, I see a segfault on my node and the agent is becoming
> unresponsive. Is this a known issue? or am I missing something obvious..Pl.
> help.
>
> It works fine with other tables under MIB-II and I did not make any changes
> to the Net SNMP code(Net SNMP 5.4.2.1).
What Operating System is the agent running on?
Did you compile this yourself, or is it a vendor-supplied version?
Does it always fail at the same point?
If so, where is this? What's the last entry that you see?
Dave
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