#1872 hrSWRunTable not returning all processes on hpux
Hello,
I am running binary version of net-snmp 5.4.1 on HP-UX 11.11.
When running snmptable command for OID .iso.org.dod.internet.mgmt.mib-2.host.hrSWRun.hrSWRunTable(.1.3.6.1.2.1.25.4.2) I do not get the complete process list as compared to a pf -ef command on the same device.
Output Examples:
ps -ef
------------------------------------------------
UID PID PPID C STIME TTY TIME COMMAND
root 0 0 0 Sep 8 ? 0:22 swapper
root 8 0 0 Sep 8 ? 0:00 supsched
root 9 0 0 Sep 8 ? 0:00 strmem
root 10 0 0 Sep 8 ? 0:00 strweld
root 11 0 0 Sep 8 ? 0:00 strfreebd
root 2 0 0 Sep 8 ? 0:02 vhand
root 3 0 0 Sep 8 ? 4:00 statdaemon
root 4 0 0 Sep 8 ? 0:04 unhashdaemon
root 12 0 0 Sep 8 ? 0:00 ttisr
root 13 0 0 Sep 8 ? 0:00 ioconfigd
root 1 0 0 Sep 8 ? 0:02 init
root 21 0 0 Sep 8 ? 0:00 lvmkd
root 22 0 0 Sep 8 ? 0:00 lvmkd
root 23 0 0 Sep 8 ? 0:00 lvmkd
root 24 0 0 Sep 8 ? 0:00 lvmkd
root 25 0 0 Sep 8 ? 0:00 lvmkd
root 26 0 0 Sep 8 ? 0:00 lvmkd
root 27 0 0 Sep 8 ? 0:00 lvmschedd
root 28 0 0 Sep 8 ? 0:09 smpsched
root 29 0 0 Sep 8 ? 0:09 smpsched
root 30 0 0 Sep 8 ? 0:00 sblksched
root 31 0 0 Sep 8 ? 0:00 sblksched
root 32 0 0 Sep 8 ? 0:00 lvmdevd
root 33 0 0 Sep 8 ? 0:00 lvmattachd
innopath 13249 1 0 Sep 11 ? 0:25 /opt/InnoPath/du/bin/dt_du_notifier
root 1651 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 66 0 0 Sep 8 ? 0:00 dmprestored
root 39 0 0 Sep 8 ? 25:20 vxfsd
root 798 1 0 Sep 8 ? 0:01 /usr/sbin/syslogd -D
root 69 0 0 Sep 8 ? 0:00 dmperrd
root 290 1 0 Sep 8 ? 1:11 /usr/sbin/vxconfigd -k -m enable
root 74 0 0 Sep 8 ? 0:03 vxiod
root 624 0 0 Sep 8 ? 0:00 rng
root 712 1 0 Sep 8 ? 0:09 /usr/sbin/syncer
root 626 0 0 Sep 8 console 0:00 vxglmd
root 1607 1 0 Sep 8 ? 0:00 /usr/sbin/rpcbind
root 801 1 0 Sep 8 ? 0:00 /usr/sbin/ptydaemon
innopath 1533 1 0 Sep 8 ? 18:26 ./ns-slapd -D /var/opt/netscape/server7/slapd-txsldsa2 -i /var/
root 823 1 0 Sep 8 ? 0:00 /usr/lbin/nktl_daemon 0 0 0 0 0 1 -2 0
root 1587 1 0 Sep 8 ? 0:03 /opt/ssh/sbin/sshd
root 833 1 0 Sep 8 ? 0:00 /usr/lbin/ntl_reader 0 1 1 1 1000 2 /var/adm/nettl /var/adm/con
root 834 833 0 Sep 8 ? 0:38 /usr/sbin/netfmt -C -F -f /var/adm/nettl.LOG000 -c /var/adm/con
root 1568 1 0 Sep 8 ? 0:01 ./uxwdog -d /var/opt/netscape/server7/admin-serv/config
root 1569 1568 0 Sep 8 ? 0:03 ns-httpd -d /var/opt/netscape/server7/admin-serv/config
innopath 1570 1569 0 Sep 8 ? 7:26 ns-httpd -d /var/opt/netscape/server7/admin-serv/config
root 1649 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1989 1 0 Sep 8 ? 0:44 sendmail: accepting connections on port 25
root 1612 0 0 Sep 8 ? 0:00 nfskd
root 1652 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1679 1 0 Sep 8 ? 0:00 /usr/sbin/rpc.lockd
root 1650 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1653 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1654 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1655 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1656 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1657 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1658 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1659 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1660 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1661 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1662 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1663 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 1664 1 0 Sep 8 ? 0:00 /usr/sbin/biod 16
root 2087 1 0 Sep 8 ? 6:17 /opt/wbem/sbin/cimserver
root 1712 1 0 Sep 8 ? 0:02 /usr/sbin/inetd
root 1673 1 0 Sep 8 ? 0:00 /usr/sbin/rpc.statd
root 1690 1 0 Sep 8 ? 0:00 /usr/lib/netsvc/fs/automount/automount -f /etc/auto_master
root 2088 2087 0 Sep 8 ? 0:00 /opt/wbem/sbin/cimservera
root 2155 1 0 Sep 8 ? 0:26 /usr/sbin/xntpd
root 2064 1 0 Sep 8 ? 0:10 /usr/sbin/fddi4subagt
root 2126 1 0 Sep 8 ? 7:04 /opt/hpservices/jre/bin/../bin/PA_RISC/native_threads/java -DRu
root 2080 1 0 Sep 8 ? 0:19 /opt/dce/sbin/rpcd
innopath 13274 13259 0 Sep 11 ? 0:00 /opt/mqm/bin/amqzfuma -m DUOS2_DMD_QMGR
root 2170 0 0 Sep 8 ? 0:52 lltd
root 2282 1 0 Sep 8 ? 0:00 /opt/perf/bin/ttd
root 2183 1 0 Sep 8 ? 0:18 /usr/sbin/pwgrd
root 2236 1 0 Sep 8 ? 0:00 /usr/sbin/envd
root 2400 1 0 Sep 8 ? 168:03 /opt/perf/bin/midaemon
root 2208 1 0 Sep 8 ? 0:00 /usr/sbin/cron
root 2802 2801 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2242 1 0 Sep 8 ? 0:00 /usr/sbin/hubd
root 2233 1 0 Sep 8 ? 0:14 /usr/sbin/stm/uut/bin/sys/diagmond
root 3541 1 0 Sep 8 ? 0:00 /usr/sbin/stm/uut/bin/tools/monitor/dm_FCMS_adapter
root 2800 1 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
innopath 13228 1 0 Sep 11 ? 12:19 /opt/InnoPath/du/bin/dt_du_server
root 2804 2802 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2331 1 0 Sep 8 ? 0:00 /opt/perf/bin/perflbd
root 2760 1 0 Sep 8 ? 0:20 /opt/VRTSob/bin/vxsvc -r /opt/VRTSob/config/Registry
root 2405 1 0 Sep 8 ? 0:05 /opt/perf/bin/pvalarmd
root 2411 1 0 Sep 8 ? 0:03 /usr/sbin/swagentd -r
root 2413 1 0 Sep 8 ? 5:38 /opt/perf/bin/scopeux
root 13043 1 0 Sep 11 ? 4:44 /opt/VRTSvcs/bin/Application/ApplicationAgent -type Application
root 2803 2801 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2805 2801 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 13031 1 0 Sep 11 ? 4:18 /opt/VRTSvcs/bin/had
root 2453 1 0 Sep 8 ? 0:09 /etc/opt/resmon/lbin/emsagent
root 2729 1 0 Sep 8 ? 0:13 /opt/VRTSvcs/bin/CmdServer
root 2778 1 0 Sep 8 ? 0:00 /usr/sbin/rpc.mountd
root 2801 1 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2806 2802 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2807 2801 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2808 2801 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2809 2802 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2810 2801 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2811 2802 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2812 2801 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2813 2802 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2814 2801 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2815 2802 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2816 2802 0 Sep 8 ? 0:00 /usr/sbin/nfsd 16
root 2912 1 0 Sep 8 ? 0:00 /sbin/krsd -i
root 2911 1 0 Sep 8 console 0:00 /usr/sbin/getty console console
root 2897 1 0 Sep 8 ? 0:24 /opt/openssl/prngd/prngd -n -c /opt/openssl/prngd/prngd.conf /v
root 2868 1 0 Sep 8 ? 0:00 /sbin/sh /usr/dt/bin/dtrc
root 2887 2868 0 Sep 8 ? 0:07 /usr/dt/bin/dtlogin
root 2891 1 0 Sep 8 ? 0:06 /sbin/autopath recover
innopath 13278 13231 0 Sep 11 ? 0:00 /opt/mqm/bin/amqzdmaa -m DUOS2_MTAS_QMGR
root 2913 1 0 Sep 8 ? 0:00 /sbin/sfd
root 2914 1 0 Sep 8 ? 0:04 /usr/sam/lbin/samd
root 2918 1 0 Sep 8 ? 0:17 /etc/opt/resmon/lbin/p_client
root 2919 1 0 Sep 8 ? 0:02 /opt/wbem/sbin/cimserverd
root 3169 2233 0 Sep 8 ? 0:00 memlogd
innopath 13202 1 0 Sep 11 ? 0:00 /bin/sh dum.sh start
innopath 13337 13328 0 Sep 11 ? 0:00 /opt/mqm/bin/amqrmppa -m DUOS2_MTAS_QMGR
root 2923 1 0 Sep 8 ? 6:16 /opt/java1.5/jre/bin/PA_RISC2.0/java -cp ./lib/m11.jar:./lib/co
innopath 13275 13259 0 Sep 11 ? 0:00 amqzmuc0 -m DUOS2_DMD_QMGR
root 13049 1 0 Sep 11 ? 3:13 /opt/VRTSvcs/bin/CFSfsckd/CFSfsckdAgent -type CFSfsckd
root 13047 1 0 Sep 11 ? 3:18 /opt/VRTSvcs/bin/CFSQlogckd/CFSQlogckdAgent -type CFSQlogckd
root 13033 1 0 Sep 11 ? 0:00 /opt/VRTSvcs/bin/hashadow
innopath 13323 13231 0 Sep 11 ? 0:53 amqzlaa0 -mDUOS2_MTAS_QMGR -fip0
root 3205 1712 0 Sep 8 ? 0:00 /etc/opt/resmon/lbin/registrar
root 25813 9223 1 19:20:38 pts/1 0:00 ps -ef
innopath 13362 13228 0 Sep 11 ? 181:37 /opt/InnoPath/du/bin/dt_du_server
innopath 13188 1 0 Sep 11 ? 0:37 /opt/InnoPath/du/bin/dt_kpi
innopath 13284 13259 0 Sep 11 ? 0:00 /opt/mqm/bin/amqzdmaa -m DUOS2_DMD_QMGR
root 4755 2331 0 Sep 8 ? 0:14 /opt/perf/bin/agdbserver -t alarmgen /var/opt/perf/datafiles/
root 13051 1 0 Sep 11 ? 3:14 /opt/VRTSvcs/bin/CVMCluster/CVMClusterAgent -type CVMCluster
innopath 13271 1 0 Sep 11 ? 68:27 /opt/bea/jdk142_08/bin/PA_RISC2.0/java -Dserver.name=DMEServer
root 3499 1 0 Sep 8 ? 0:00 /usr/sbin/stm/uut/bin/tools/monitor/disk_em
root 13053 1 0 Sep 11 ? 3:15 /opt/VRTSvcs/bin/CVMVolDg/CVMVolDgAgent -type CVMVolDg
root 3972 1 0 Sep 8 ? 0:00 /usr/sbin/stm/uut/bin/tools/monitor/msamon
innopath 13317 13249 0 Sep 11 ? 2:35 /opt/InnoPath/du/bin/dt_du_notifier
root 13327 1 0 Sep 11 ? 0:00 /usr/sbin/vxfsckd
root 9214 1587 0 17:37:40 ? 0:00 sshd: root@pts/1
root 3168 2233 0 Sep 8 ? 0:03 diaglogd
root 3590 1 0 Sep 8 ? 0:01 /usr/sbin/stm/uut/bin/tools/monitor/dm_core_hw
root 10197 1587 0 Sep 13 ? 0:00 sshd: innopath [priv]
root 3202 2233 0 Sep 8 ? 3:07 psmctd
innopath 13359 1 0 Sep 11 ? 0:00 /opt/mqm/bin/runmqlsr -m DUOS2_DMD_QMGR -t TCP -p 1416
innopath 13331 13286 0 Sep 11 ? 0:00 /opt/mqm/bin/runmqchi -m DUOS2_DMD_QMGR -r
root 3680 1 0 Sep 8 ? 0:00 /usr/sbin/stm/uut/bin/tools/monitor/dm_memory
root 17203 1 0 Sep 12 ? 84:04 /usr/local/sbin/snmpd -p /var/run/snmpd.pid -C -c /usr/local/sh
root 3124 0 0 Sep 8 ? 0:01 qld
innopath 13282 13259 0 Sep 11 ? 0:01 /opt/mqm/bin/amqrrmfa -t2332800 -s2592000 -p2592000 -g5184000 -
root 13045 1 0 Sep 11 ? 3:25 /opt/VRTSvcs/bin/CFSMount/CFSMountAgent -type CFSMount
innopath 13273 13231 0 Sep 11 ? 0:00 amqzmuc0 -m DUOS2_MTAS_QMGR
innopath 13381 13228 0 Sep 11 ? 183:32 /opt/InnoPath/du/bin/dt_du_server
innopath 13355 13217 0 Sep 11 ? 3:42 /opt/InnoPath/du/bin/dt_sccs
root 3558 1 0 Sep 8 ? 0:00 /usr/sbin/stm/uut/bin/tools/monitor/dm_TL_adapter
innopath 13378 13228 0 Sep 11 ? 184:05 /opt/InnoPath/du/bin/dt_du_server
innopath 13380 13228 0 Sep 11 ? 182:21 /opt/InnoPath/du/bin/dt_du_server
innopath 10203 10197 0 Sep 13 ? 0:00 sshd: innopath@pts/0
root 3712 1 0 Sep 8 ? 0:00 /usr/sbin/stm/uut/bin/tools/monitor/dm_ql_adapter
innopath 10205 10203 0 Sep 13 pts/0 0:00 -sh
innopath 13277 13231 0 Sep 11 ? 0:01 /opt/mqm/bin/amqrrmfa -t2332800 -s2592000 -p2592000 -g5184000 -
innopath 13217 1 0 Sep 11 ? 4:30 /opt/InnoPath/du/bin/dt_sccs
innopath 13231 1 0 Sep 11 ? 0:06 amqzxma0 -m DUOS2_MTAS_QMGR
innopath 13259 1 0 Sep 11 ? 0:12 amqzxma0 -m DUOS2_DMD_QMGR
root 3936 1 0 Sep 8 ? 0:49 /usr/sbin/stm/uut/bin/tools/monitor/lpmc_em
innopath 13379 13228 0 Sep 11 ? 183:12 /opt/InnoPath/du/bin/dt_du_server
innopath 13357 13217 0 Sep 11 ? 61:11 /opt/InnoPath/du/bin/dt_sccs
innopath 13348 13228 0 Sep 11 ? 0:58 /opt/InnoPath/du/bin/dt_du_server
innopath 13334 13286 0 Sep 11 ? 0:02 /opt/mqm/bin/amqpcsea DUOS2_DMD_QMGR
root 13055 1 0 Sep 11 ? 4:32 /opt/VRTSvcs/bin/NIC/NICAgent -type NIC
root 3850 1 0 Sep 8 ? 0:00 /usr/sbin/stm/uut/bin/tools/monitor/fpl_em
root 3899 1 0 Sep 8 ? 2:06 /usr/sbin/stm/uut/bin/tools/monitor/ia64_corehw
innopath 13329 13279 0 Sep 11 ? 0:01 /opt/mqm/bin/amqpcsea DUOS2_MTAS_QMGR
root 4754 2331 0 Sep 8 ? 0:21 /opt/perf/bin/rep_server -t SCOPE /var/opt/perf/datafiles/loggl
innopath 13279 13231 0 Sep 11 ? 0:01 /opt/mqm/bin/amqzmgr0 -m DUOS2_MTAS_QMGR
innopath 13338 13331 0 Sep 11 ? 0:00 /opt/mqm/bin/amqrmppa -m DUOS2_DMD_QMGR
root 3996 1 0 Sep 8 ? 0:00 /usr/sbin/stm/uut/bin/tools/monitor/sysstat_em
innopath 13328 13279 0 Sep 11 ? 0:00 /opt/mqm/bin/runmqchi -m DUOS2_MTAS_QMGR -r
innopath 13368 13228 0 Sep 11 ? 62:42 /opt/InnoPath/du/bin/dt_du_server
innopath 13281 13259 0 Sep 11 ? 0:02 amqzmur0 -m DUOS2_DMD_QMGR
innopath 13286 13259 0 Sep 11 ? 0:01 /opt/mqm/bin/amqzmgr0 -m DUOS2_DMD_QMGR
root 13175 1 0 Sep 11 ? 0:00 /usr/sbin/qlogckd
root 4756 4755 0 Sep 8 ? 0:34 /opt/perf/bin/alarmgen -svr 4755 -t alarmgen /var/opt/perf/data
innopath 13272 13231 0 Sep 11 ? 0:00 /opt/mqm/bin/amqzfuma -m DUOS2_MTAS_QMGR
innopath 13330 13259 0 Sep 11 ? 0:53 amqzlaa0 -mDUOS2_DMD_QMGR -fip0
root 25709 3899 0 19:20:04 ? 0:00 <defunct>
innopath 13322 13249 0 Sep 11 ? 24:15 /opt/InnoPath/du/bin/dt_du_notifier
innopath 13367 13228 0 Sep 11 ? 0:55 /opt/InnoPath/du/bin/dt_du_server
innopath 13339 1 0 Sep 11 ? 0:00 /opt/mqm/bin/runmqlsr -m DUOS2_MTAS_QMGR -t TCP -p 1414
innopath 13369 13228 0 Sep 11 ? 182:19 /opt/InnoPath/du/bin/dt_du_server
innopath 13276 13231 0 Sep 11 ? 0:02 amqzmur0 -m DUOS2_MTAS_QMGR
innopath 13258 13202 0 Sep 11 ? 15:17 /opt/bea/jdk142_08/bin/PA_RISC2.0/java -Dserver.name=DUMServer
root 9223 9214 0 17:37:41 pts/1 0:00 -sh
--------------------------------------------
snmptable -Cf : -CH -v 1 -c ******* localhost .1.3.6.1.2.1.25.4.2
--------------------------------------------
0:"swapper":SNMPv2-SMI::zeroDotZero:"swapper":"":application:runnable
1:"init":SNMPv2-SMI::zeroDotZero:"init":"":application:runnable
2:"vhand":SNMPv2-SMI::zeroDotZero:"vhand":"":application:runnable
3:"statdaemon":SNMPv2-SMI::zeroDotZero:"statdaemon":"":application:runnable
4:"unhashdaemon":SNMPv2-SMI::zeroDotZero:"unhashdaemon":"":application:runnable
8:"supsched":SNMPv2-SMI::zeroDotZero:"supsched":"":application:runnable
9:"strmem":SNMPv2-SMI::zeroDotZero:"strmem":"":application:runnable
10:"strweld":SNMPv2-SMI::zeroDotZero:"strweld":"":application:runnable
11:"strfreebd":SNMPv2-SMI::zeroDotZero:"strfreebd":"":application:runnable
12:"ttisr":SNMPv2-SMI::zeroDotZero:"ttisr":"":application:runnable
13:"ioconfigd":SNMPv2-SMI::zeroDotZero:"ioconfigd":"":application:running
21:"lvmkd":SNMPv2-SMI::zeroDotZero:"lvmkd":"":application:runnable
22:"lvmkd":SNMPv2-SMI::zeroDotZero:"lvmkd":"":application:runnable
23:"lvmkd":SNMPv2-SMI::zeroDotZero:"lvmkd":"":application:runnable
24:"lvmkd":SNMPv2-SMI::zeroDotZero:"lvmkd":"":application:runnable
25:"lvmkd":SNMPv2-SMI::zeroDotZero:"lvmkd":"":application:runnable
26:"lvmkd":SNMPv2-SMI::zeroDotZero:"lvmkd":"":application:runnable
27:"lvmschedd":SNMPv2-SMI::zeroDotZero:"lvmschedd":"":application:runnable
28:"smpsched":SNMPv2-SMI::zeroDotZero:"smpsched":"":application:runnable
29:"smpsched":SNMPv2-SMI::zeroDotZero:"smpsched":"":application:runnable
30:"sblksched":SNMPv2-SMI::zeroDotZero:"sblksched":"":application:runnable
31:"sblksched":SNMPv2-SMI::zeroDotZero:"sblksched":"":application:runnable
32:"lvmdevd":SNMPv2-SMI::zeroDotZero:"lvmdevd":"":application:runnable
33:"lvmattachd":SNMPv2-SMI::zeroDotZero:"lvmattachd":"":application:runnable
Logged In: YES
user_id=848638
Originator: NO
Does it always stop at the same process or after the same amount of processes? If you do multiple snmpwalks shortly after another, do they always report the same output or does it differ a lot?
Do you have many short-lived processes? The agent may get confused by getting the process list and then finding a process not existing when looking into the details of the process.
BTW, has the binary been compiled on the same (type of) machine/OS/kernel? 32- or 64-bit kernel? 32- or 64-bit binary?
Logged In: YES
user_id=848638
Originator: NO
See Bug 1746831 for a race condition reported on Linux. May it apply here, too?
Logged In: YES
user_id=271619
Originator: YES
Multiple snmpwalks done just seconds apart over a few minutes produce the same output.
The system in question has a stable set of processes. No short lived processes coming and going.
Binary version installed is for 64bit and is running on a 64bit system.
The technical details of bug 1746831 are a bit over my head but I do not believe this is the same situation.
Logged In: YES
user_id=848638
Originator: NO
The next process would be PID 13249. There must be something special to it. Can you try running strace/truss (or whatever is the HP-UX equivalent, I forgot) on the snmpd binary during the walk and look for suspicious errors? Feel free to post the output if you don't manage to find something yourself.
Logged In: YES
user_id=88893
Originator: NO
I'm not sure that's correct.
The hrSWRunTable is indexed by process ID
(unlike the output of ps), so the next entry
would probably be 39 (vxfsd).
The problem with snmptable is that it traverses
all of the columns in parallel, so a problem
with any one of them might throw the whole command
out of kilter.
Could you try running "snmpgetnext ... hrSWRunName.33"
What does that return?
It might also be worth running "snmpwalk" on each of the
columns individually, to check whether this problem
affects the whole table, or just selected columns.