[SNMP4J] strange problem
Peirong Feng (pefeng)
pefeng at cisco.com
Mon Mar 9 00:16:19 CET 2009
Hi Frank,
The library is the latest one 1.9.3b. The second snmp4j call is in the
callback, but the callback will call " PDU req = event.getRequest();
PDU resp = event.getResponse(); ((Snmp)event.getSource()).cancel(req,
this);" first.
Is the timeout error caused by the fact that the second call is inside
the callback and I'm reusing the Snmp and Target objects?
Peirong
-----Original Message-----
From: Frank Fock [mailto:fock at agentpp.com]
Sent: Saturday, March 07, 2009 1:24 AM
To: Peirong Feng (pefeng)
Cc: snmp4j at agentpp.org
Subject: Re: [SNMP4J] strange problem
Hi,
What version of SNMP4J are you using?
What is your question?
Does your async callback routine return
immediately?
Best regards,
Frank
Peirong Feng (pefeng) wrote:
> Hi there,
>
> My program reads from switch with an asynchronous call followed with
> sychronous call. The async call went fine but the sync call timed out,
> and then snmp4j lib reports the reply from switch. The tcpdump shows
> that the reply came back immediately. I'm reusing the target object
and
> snmp object here.
>
> Attached is the tcpdump packet trace and the log I got:
>
> ------FIRST ASYNC CALL
> 2009-03-06 19:52:29.336 -0430 INFO
> org.snmp4j.transport.DefaultUdpTransportMapping - UDP receive
buffer
> size for socket 10.201.2.16/0 is set to: 56320
> 2009-03-06 19:52:29.388 -0430 DEBUG org.snmp4j.Snmp
> - Running pending async request with handle PduHandle[665093246] and
> retry count left 1
> 2009-03-06 19:52:29.388 -0430 DEBUG
> org.snmp4j.transport.DefaultUdpTransportMapping - Sending message
to
> 10.201.15.5/161 with length 104:
>
30:66:02:01:01:04:07:6e:74:5f:72:65:61:64:a0:58:02:04:27:a4:84:7e:02:01:
>
00:02:01:00:30:4a:30:0f:06:0b:2b:06:01:02:01:1f:01:01:01:01:02:05:00:30:
>
11:06:0d:2b:06:01:04:01:91:60:01:03:03:01:07:02:05:00:30:11:06:0d:2b:06:
>
01:04:01:91:60:01:03:03:01:03:02:05:00:30:11:06:0d:2b:06:01:04:01:91:60:
> 01:03:03:01:04:02:05:00
> 2009-03-06 19:52:29.395 -0430 DEBUG
> org.snmp4j.transport.DefaultUdpTransportMapping - Received message
> from /10.201.15.5/161 with length 132:
>
30:81:81:02:01:01:04:07:6e:74:5f:72:65:61:64:a2:73:02:04:27:a4:84:7e:02:
>
01:00:02:01:00:30:65:30:25:06:0b:2b:06:01:02:01:1f:01:01:01:01:02:04:16:
>
69:66:63:32:20:28:53:6c:6f:74:3a:20:31:20:50:6f:72:74:3a:20:32:29:30:13:
>
06:0d:2b:06:01:04:01:91:60:01:03:03:01:07:02:02:02:00:97:30:13:06:0d:2b:
>
06:01:04:01:91:60:01:03:03:01:03:02:04:02:00:97:30:12:06:0d:2b:06:01:04:
> 01:91:60:01:03:03:01:04:02:02:01:01
> 2009-03-06 19:52:29.396 -0430 DEBUG org.snmp4j.Snmp
> - Looking up pending request with handle PduHandle[665093246]
> 2009-03-06 19:52:29.396 -0430 DEBUG org.snmp4j.Snmp
> - Cancelling pending request with handle PduHandle[665093246]
>
> ------SECOND SYNC CALL
> 2009-03-06 19:52:29.397 -0430 DEBUG org.snmp4j.Snmp
> - Running pending sync request with handle PduHandle[665093248] and
> retry count left 1
> 2009-03-06 19:52:29.397 -0430 DEBUG
> org.snmp4j.transport.DefaultUdpTransportMapping - Sending message
to
> 10.201.15.5/161 with length 50:
>
30:30:02:01:01:04:07:6e:74:5f:72:65:61:64:a0:22:02:04:27:a4:84:80:02:01:
>
00:02:01:00:30:14:30:12:06:0e:2b:06:01:04:01:91:60:01:03:02:01:0b:81:17:
> 05:00
> ------SECOND SYNC CALL RETRY (5 seconds later)
> 2009-03-06 19:52:34.398 -0430 DEBUG org.snmp4j.Snmp
> - Running pending sync request with handle PduHandle[665093248] and
> retry count left 0
> 2009-03-06 19:52:34.398 -0430 DEBUG
> org.snmp4j.transport.DefaultUdpTransportMapping - Sending message
to
> 10.201.15.5/161 with length 50:
>
30:30:02:01:01:04:07:6e:74:5f:72:65:61:64:a0:22:02:04:27:a4:84:80:02:01:
>
00:02:01:00:30:14:30:12:06:0e:2b:06:01:04:01:91:60:01:03:02:01:0b:81:17:
> 05:00
> ------SECOND SYNC CALL TIMED OUT (another 5 seconds later)
> 2009-03-06 19:52:39.400 -0430 DEBUG org.snmp4j.Snmp
> - Request timed out: 665093248
> 2009-03-06 19:52:39.400 -0430 DEBUG org.snmp4j.Snmp
> - Removed pending request with handle: PduHandle[665093248]
> ------SECOND SYNC CALL RESPONSES (which should be received earlier)
> 2009-03-06 19:52:39.401 -0430 DEBUG
> org.snmp4j.transport.DefaultUdpTransportMapping - Received message
> from /10.201.15.5/161 with length 114:
>
30:70:02:01:01:04:07:6e:74:5f:72:65:61:64:a2:62:02:04:27:a4:84:80:02:01:
>
00:02:01:00:30:54:30:52:06:0e:2b:06:01:04:01:91:60:01:03:02:01:0b:81:17:
>
04:40:20:00:00:80:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
>
00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
> 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
> 2009-03-06 19:52:39.401 -0430 DEBUG org.snmp4j.Snmp
> - Looking up pending request with handle PduHandle[665093248]
> 2009-03-06 19:52:39.401 -0430 WARN org.snmp4j.Snmp
> - Received response that cannot be matched to any outstanding request,
> address=10.201.15.5/161, requestID=665093248
> 2009-03-06 19:52:39.401 -0430 WARN org.snmp4j.Snmp
> - Received response that cannot be matched to any outstanding request,
> address=10.201.15.5/161, requestID=665093248
> 2009-03-06 19:52:39.401 -0430 DEBUG
> org.snmp4j.transport.DefaultUdpTransportMapping - Received message
> from /10.201.15.5/161 with length 114:
>
30:70:02:01:01:04:07:6e:74:5f:72:65:61:64:a2:62:02:04:27:a4:84:80:02:01:
>
00:02:01:00:30:54:30:52:06:0e:2b:06:01:04:01:91:60:01:03:02:01:0b:81:17:
>
04:40:20:00:00:80:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
>
00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
> 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
> 2009-03-06 19:52:39.402 -0430 DEBUG org.snmp4j.Snmp
> - Looking up pending request with handle PduHandle[665093248]
> 2009-03-06 19:52:39.402 -0430 WARN org.snmp4j.Snmp
> - Received response that cannot be matched to any outstanding request,
> address=10.201.15.5/161, requestID=665093248
> 2009-03-06 19:52:39.402 -0430 WARN org.snmp4j.Snmp
> - Received response that cannot be matched to any outstanding request,
> address=10.201.15.5/161, requestID=665093248
>
> Peirong
>
>
>
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>
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