[Nfd-dev] Quick question - onIncomingData called twice

[Alex Afanasyev]

On Feb 14, 2017, at 6:03 PM, Gusev, Peter <peter at remap.ucla.edu> wrote:
> 
> Hi devs,
> 
> In the NFD log, I observe:
> 
> 1487122986.473758 DEBUG: [Forwarder] onIncomingInterest face=266 interest=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.474156 DEBUG: [ContentStore] find /test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta L
> 1487122986.474518 DEBUG: [Forwarder] onContentStoreMiss interest=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.474833 DEBUG: [Forwarder] onOutgoingInterest face=265 interest=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.475167 DEBUG: [BestRouteStrategy2] /test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta?ndn.MustBeFresh=1&ndn.Nonce=273900197 from=266 newPitEntry-to=265
> 1487122986.475544 DEBUG: [Forwarder] onIncomingData face=265 data=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.475841 DEBUG: [ContentStore] insert /test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.476144 DEBUG: [Forwarder] onIncomingData matching=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.476418 DEBUG: [Strategy] beforeSatisfyInterest pitEntry=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta inFace=265 data=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.477014 DEBUG: [Forwarder] onOutgoingData face=266 data=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.477350 DEBUG: [Forwarder] onIncomingData face=265 data=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.477667 DEBUG: [ContentStore] insert /test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.478023 DEBUG: [Forwarder] onIncomingData matching=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 1487122986.478559 DEBUG: [Strategy] beforeSatisfyInterest pitEntry=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta inFace=265 data=/test/testJoin/user1/730551A4-70CC-4DBB-90C1-031488B8592A/about/data/_meta
> 
> highlighted are two identical entries - does it mean NFD is getting data twice?
> could it be application’s fault (i.e. it pushes data two times instead of just one)?

I looks like it.  After the first data packet, the inFace records in PIT entry will be removed, but PIT entry itself will be kept for a bit.  The second received data gets processed, but not forwarded downstream, as there are no more in records.

--
Alex

> 
> Thanks, 
> 
> -- 
> Peter Gusev
> 
> peter at remap.ucla.edu <mailto:peter at remap.ucla.edu>
> +1 213 5872748
> peetonn_ (skype)
> 
> Software Engineer/Programmer Analyst @ REMAP UCLA
> 
> Video streaming/ICN networks/Creative Development
> 
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