[Xymon] LDAP Check causes xymonnet to hand
Thomas Vachon
vachon at sessionm.com
Fri Nov 1 15:43:12 CET 2013
Jeremy,
It seems LDAP surely is the issue. The check has no settable timeout in
hosts.cfg. As for what happens to our LOVELY OpenDirectory, it just hangs
both SSL and plain text. All ports remain open, ping even still works.
I caught it this time and it does seem that the lack of a timeout is the
problem here (the check only terminated because we rebooted the box)
> Error output:
> WARNING: Runtime 521 longer than time limit (300)
>
> TIME SPENT
> Event Start time
> Duration
> xymonnet startup 1383315414.744906
> -
> Service definitions loaded 1383315414.746373
> 0.001467
> Tests loaded 1383315414.815137
> 0.068764
> DNS lookups completed 1383315414.815838
> 0.000701
> Test engine setup completed 1383315414.839164
> 0.023326
> TCP tests completed 1383315426.045943
> 11.206779
> PING test completed (104 hosts) 1383315434.035841
> 7.989898
> PING test results sent 1383315434.036641
> 0.000800
> Test result collection completed 1383315434.037506
> 0.000865
> LDAP test engine setup completed 1383315434.037568
> 0.000062
> LDAP tests executed 1383315935.053479
> 501.015911
> LDAP tests result collection completed 1383315935.053491
> 0.000012
> Test results transmitted 1383315935.055777
> 0.002286
> xymonnet completed 1383315935.062680
> 0.006903
> TIME TOTAL
> 520.317774
In the host.cfg we have: $IP commander.example.com # ldap://
commander.example.com:389/dc=commander,dc=example,dc=com
It is our only ldap check (its over a IPsec S2S link with 50/50 connection)
Xymonnet is standard install "CMD xymonnet --report --ping
--checkresponse", the proc only exits when we reboot the server or it
passes normally.
I couldn't get the command to just do the one server, will try again in a
bit. I think the ultimate problem is ldap check never times out, so how
can one be set?
--
Thomas Vachon
On Thu, Oct 31, 2013 at 12:31 AM, Jeremy Laidman
<jlaidman at rebel-it.com.au>wrote:
> Thomas
>
> In what way is the LDAP server in a "bad state"?
>
> Are you using LDAP or LDAPS?
>
> Can you connect to the server on the LDAP port using telnet?
>
> What does your hosts.cfg file entry look like?
>
> What parameters do you have for xymonnet in tasks.cfg?
>
> Does the xymonnet process eventually exit?
>
> Can you run xymonnet manually (as the xymon user, under a xymoncmd shell),
> such as:
>
> $ xymonnet --debug --timeout=1 <name-of-server>
>
> If this fails in the same way, perhaps you can tweak some parameters, such
> as adding "--dns=ip" or "--noping" or other options.
>
> J
>
>
>
> On 31 October 2013 00:01, Thomas Vachon <vachon at sessionm.com> wrote:
>
>> We are having issues with xymonnet handing on 4.3.12 (happened on 4.3.10
>> too). As soon as we added an ldap check which can hang (due to the ldap
>> server being in a bad state), xymonnet hangs and goes purple on all remote
>> checks.
>>
>> Nothing shows in the logs. Here is the historical xymonnet info from the
>> last purple:
>>
>> Wed Oct 30 12:12:10 2013
>>
>>
>> xymonnet version 4.3.12
>> SSL library : OpenSSL 1.0.1e 11 Feb 2013
>> LDAP library: OpenLDAP 20431
>>
>> Statistics:
>> Hosts total : 70
>> Hosts with no tests : 1
>> Total test count : 183
>> Status messages : 183
>> Alert status msgs : 0
>> Transmissions : 3
>>
>> DNS statistics:
>> # hostnames resolved : 115
>> # succesful : 69
>> # failed : 0
>> # calls to dnsresolve : 182
>>
>> TCP test statistics:
>> # TCP tests total : 113
>> # HTTP tests : 45
>> # Simple TCP tests : 68
>> # Connection attempts : 113
>> # bytes written : 7192
>> # bytes read : 528667
>>
>>
>> TIME SPENT
>> Event Start time
>> Duration
>> xymonnet startup 1383135130.081755
>> -
>> Service definitions loaded 1383135130.089141
>> 0.007386
>> Tests loaded 1383135130.147247
>> 0.058106
>> DNS lookups completed 1383135130.147712
>> 0.000465
>> Test engine setup completed 1383135130.159468
>> 0.011756
>> TCP tests completed 1383135142.406914
>> 12.247446
>> PING test completed (69 hosts) 1383135149.073309
>> 6.666395
>> PING test results sent 1383135149.074005
>> 0.000696
>> Test result collection completed 1383135149.075192
>> 0.001187
>> LDAP test engine setup completed 1383135149.075263
>> 0.000071
>> LDAP tests executed 1383135151.403612
>> 2.328349
>> LDAP tests result collection completed 1383135151.403621
>> 0.000009
>> Test results transmitted 1383135151.405148
>> 0.001527
>> xymonnet completed 1383135151.407244
>> 0.002096
>> TIME TOTAL
>> 21.325489
>>
>>
>>
>> --
>> Thomas Vachon
>>
>>
>> _______________________________________________
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>> Xymon at xymon.com
>> http://lists.xymon.com/mailman/listinfo/xymon
>>
>>
>
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