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[LDM #BOV-866570]: LDM crashes on noaaport.admin.niu.edu, then sends the load average skyrocketing
- Subject: [LDM #BOV-866570]: LDM crashes on noaaport.admin.niu.edu, then sends the load average skyrocketing
- Date: Wed, 13 May 2015 08:21:26 -0600
Hi Gilbert and Steve,
re:
> Just FYI, this anti-DOS feature can also be disabled by setting
> the registry parameter "/server/enable-anti-DOS" to "FALSE". For example,
>
> regutil -s FALSE /server/enable-anti-DOS
>
> The default value of this parameter is TRUE.
After letting LDM v6.10.1 run overnight (with no problems), I stopped it this
morning, changed the runtime link to point at v6.12.9, edited
~ldm/etc/registry.xml
and added the anti-DOS <server> tag, and restarted. When I took a look at load
averages about 20 minutes later, they had risen to 7 and the top CPU users were
'ldmd's:
top - 09:18:30 up 4 days, 16:12, 1 user, load average: 7.02, 6.88, 5.03
Tasks: 199 total, 8 running, 191 sleeping, 0 stopped, 0 zombie
Cpu(s): 87.6%us, 0.1%sy, 0.0%ni, 12.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 6096936k total, 5010388k used, 1086548k free, 256840k buffers
Swap: 8388600k total, 0k used, 8388600k free, 4338016k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
27397 ldm 25 0 1204m 2500 1376 R 100.0 0.0 20:25.93 ldmd
27459 ldm 25 0 1204m 2468 1360 R 100.0 0.0 19:22.15 ldmd
27463 ldm 25 0 1204m 2392 1352 R 100.0 0.0 19:22.71 ldmd
27464 ldm 25 0 1204m 2392 1356 R 100.0 0.0 19:22.71 ldmd
27465 ldm 25 0 1204m 2520 1356 R 100.0 0.0 19:22.63 ldmd
27467 ldm 25 0 1204m 2440 1356 R 100.0 0.0 19:21.21 ldmd
27466 ldm 25 0 1204m 2512 1352 R 99.8 0.0 19:21.48 ldmd
I then stopped the LDM (I had to kill the 'ldmd' processes by hand and
delete and remake the LDM queue to), switched the runtime link back to
v6.10.1 and restarted. The load averages returned to their low values:
top - 09:25:15 up 4 days, 16:19, 1 user, load average: 0.91, 4.47, 4.78
Tasks: 199 total, 1 running, 198 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.3%us, 0.7%sy, 0.0%ni, 98.5%id, 0.0%wa, 0.2%hi, 0.4%si, 0.0%st
Mem: 6096936k total, 5025332k used, 1071604k free, 258056k buffers
Swap: 8388600k total, 0k used, 8388600k free, 4338016k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
29332 ldm 16 0 1199m 232m 231m S 1.0 3.9 0:00.20 ldmd
29338 ldm 16 0 1199m 110m 109m S 1.0 1.8 0:00.59 ldmd
29249 ldm 16 0 1198m 110m 109m S 0.7 1.9 0:01.08 rtstats
29254 ldm 15 0 1199m 230m 229m S 0.7 3.9 0:00.53 ldmd
29274 ldm 16 0 1199m 110m 109m S 0.7 1.9 0:00.84 ldmd
29337 ldm 16 0 1199m 110m 109m S 0.7 1.8 0:00.58 ldmd
4059 root 16 0 10256 704 608 S 0.3 0.0 0:27.20 hald-addon-stor
11222 root 15 0 0 0 0 S 0.3 0.0 0:00.58 pdflush
29251 ldm 15 0 1231m 261m 240m S 0.3 4.4 0:00.73 ldmd
29253 ldm 15 0 1199m 171m 170m S 0.3 2.9 0:00.84 ldmd
29266 ldm 16 0 1199m 110m 109m S 0.3 1.9 0:00.87 ldmd
29268 ldm 16 0 1199m 240m 239m S 0.3 4.0 0:00.53 ldmd
29342 ldm 16 0 1199m 110m 109m S 0.3 1.8 0:00.57 ldmd
My surmise from yesterday afternoon appears to stand.
Cheers,
Tom
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Ticket Details
===================
Ticket ID: BOV-866570
Department: Support LDM
Priority: Normal
Status: Closed
