[Nfd-dev] Emergency

[Dehart, John]

Junxiao,

Any thoughts on where this interest might be coming from?

John

On Aug 27, 2017, at 10:20 AM, Junxiao Shi <shijunxiao at email.arizona.edu<mailto:shijunxiao at email.arizona.edu>> wrote:

Hi John

This is an Interest with a very long name. NFD would create many name tree nodes, which takes long time and large amount of memory. If RIB sends a request and doesn't get serviced in time, RIB crashes NFD.
I tested a similar scenario on my devbox two weeks ago, and it took several minutes for NFD to process this packet before the system ran out of memory.
I'll enter a bug tonight.

Yours, Junxiao

On Aug 27, 2017 08:05, "Dehart, John" <jdd at wustl.edu<mailto:jdd at wustl.edu>> wrote:

All:

Well, having said all of that, we actually had a crash on most of the Testbed nodes overnight.
I have located one log file with DEBUG turned on that has a FATAL error in it.
I have it available here:

https://www.arl.wustl.edu/~jdd/REMAP_CRASH/nfd.log.10.gz

I am still going through it but one obivious thing is lines like this one:

1503809296.363506 DEBUG: [Forwarder] onIncomingInterest face=272 interest=/ndn/multicast/.../.../... <snip 15950 characters> ../.../.../.../.../.../.../.../.../…

Note that I removed 15950 characters to get it to fit into this email.
So, nfd is reporting a interest /ndn/multicast/…/…/   then with repeating “…/“ for over 16000 characters.

The crashes all seemed to occur about 12:15AM Central time (11:15 Mountain, 10:15 Pacific, …).
Althought there are a few machines where it happened about 1 hour 15 minutes earlier.  So, perhaps there
were multiple times it happened, but I just have one in a log file.

Any thoughts?

John


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