DNS timeout not working 🔗 link

Hi,
    Since I installed version 4.3 (previous version may have same issue) DNS
timeout stopped working. In Task.cfg I put this line:

CMD xymonnet --report --ping --checkresponse --timeout=10 --dns-timeout=15

But dns-timeout didn't solve the issue.

When I put a host that doesn't response to DNS, time-out is too large:
Wed May 4 16:03:59 2011 dns NOT ok Service dns on HS-755 is not OK : Service
unavailable
 Timeout
Seconds: 178.169

If I remove dns-timeout parameter DNS check time is even greater:

Service dns on HS-755 is not OK : Service unavailable

Timeout

Seconds: 356.336


With DNS test enabled:
<<

TIME SPENT
Event                                           Start time          Duration
xymonnet startup                            1357697.287237                 -
Service definitions loaded                  1357697.287887          0.000650
Tests loaded                                1357697.293270          0.005382
DNS lookups completed                       1357699.442598          2.149328
Test engine setup completed                 1357699.445198          0.002600
TCP tests completed                         1357711.442436         11.997237
PING test completed (108 hosts)             1357719.107813          7.665377
PING test results sent                      1357719.108279          0.000465
Test result collection completed            1357719.108485          0.000205
LDAP test engine setup completed            1357719.108485          0.000000
LDAP tests executed                         1357719.108486          0.000000
LDAP tests result collection completed      1357719.108486          0.000000
DNS tests executed                          1357897.279645        178.171159
Test results transmitted                    1357897.281396          0.001751
xymonnet completed                          1357897.282446          0.001049
TIME TOTAL                                                        199.995208

Without DNS test:

<<

TIME SPENT
Event                                           Start time          Duration
xymonnet startup                              64910.045082                 -
Service definitions loaded                    64910.045765          0.000682
Tests loaded                                  64910.051131          0.005365
DNS lookups completed                         64910.055655          0.004524
Test engine setup completed                   64910.058453          0.002797
TCP tests completed                           64911.034675          0.976221
PING test completed (105 hosts)               64912.167164          1.132489
PING test results sent                        64912.168239          0.001074
Test result collection completed              64912.168467          0.000227
LDAP test engine setup completed              64912.168467          0.000000
LDAP tests executed                           64912.168468          0.000000
LDAP tests result collection completed        64912.168468          0.000000
DNS tests executed                            64912.177910          0.009441
Test results transmitted                      64912.179840          0.001930
xymonnet completed                            64912.181299          0.001459
TIME TOTAL                                                          2.136217

Does anyone know how to fix it? If I put many DNS test failures the whole
xymon get purple because xymonnet don't do DNS test in parallel but in
serial (one after other).

thank for you time,

From the known errors page:

DNS error reported for network tests

The xymonnet network tester uses the built-in ARES library for DNS
lookups. There have been reports that this library fails on some
systems; one confirmed case is on "OSF1 V5.1". So if you suddenly get a
lot of failed network tests that report "DNS error", try running
xymonnet with the "--no-ares" option to use the standard DNS lookups
instead.

On 5/4/2011 at 11:48 PM, in message

<BANLkTinwG9V6-PvMXvLz=user-647b7774001d@xymon.invalid>, Raul GN

<user-340accf16858@xymon.invalid> wrote:

--dns-timeout=15

Service

Duration

     -

0.000650

0.005382

2.149328

0.002600

11.997237

7.665377

0.000465

0.000205

0.000000

0.000000

0.000000

178.171159

0.001751

0.001049

199.995208

Duration

     -

0.000682

0.005365

0.004524

0.002797

0.976221

1.132489

0.001074

0.000227

0.000000

0.000000

0.000000

0.009441

0.001930

0.001459

2.136217

Just want to let you know that I've seen something similar, so I think 
there is a bug. Haven't had the opportunity to see whether it is in 
Xymon, or if it's a bug in the C-ARES DNS library handling of timeouts.

It's something I'll look into once my eyes are fully OK again, hopefully 
in a couple of weeks.


Regards,
Henrik