I've taken steps to reduce the spikes in host counts, yet the segfaults
after an IDLE_PURGE cycle are still prevalent.  Anyone else having this
issue?  Any idea's how to fix this?  I have gdb output and have posted
it before.  I can attach again if someone will actually do something
with it.  My skill set in C development/debugging is ever expanding, but
they're exhausted for the time being.

 

TIA for any help!

 

Gary

 

 

________________________________

From: Gary Gatten 
Sent: Friday, June 19, 2009 2:49 PM
To: 'ntop@unipi.it'
Subject: RE: [Ntop] crash after IDLE_PURGE

 

PS: The only way I found this is the new graphs in 3.3.x that keep info
about how many hosts ntop knows about.  Whomever decided to add this -
good idea!

 

________________________________

From: Gary Gatten 
Sent: Friday, June 19, 2009 2:01 PM
To: Gary Gatten; 'ntop@unipi.it'
Subject: RE: [Ntop] crash after IDLE_PURGE

 

I MAY have found the trigger for this. Our internal A/V / Spyware /
whatever scans our entire internal network range causing nTop to "see"
about 50,000 hosts.  I'm not 100% sure on the correlation, but it
appears Ntop Crashes every couple hours when this discovery process
runs.  Not *every* time - but often enough I'm convinced it play at
least some role in these crashes.

 

Any thoughts?  My -x and -X values are high enough to not cause any
issues...

 

________________________________

From: Gary Gatten 
Sent: Thursday, June 18, 2009 11:22 AM
To: 'ntop@unipi.it'
Subject: RE: [Ntop] crash after IDLE_PURGE

 

FWIW this is the last entry in the log:

 

IDLE_PURGE: Device 1 [NetFlow-device.2]: 719/8486 hosts deleted, elapsed
time is 0.494425 seconds (0.000688 per host)

 

 

 

________________________________

From: ntop-boun...@unipi.it [mailto:ntop-boun...@unipi.it] On Behalf Of
Gary Gatten
Sent: Thursday, June 18, 2009 11:19 AM
To: ntop@unipi.it; ntop-...@unipi.it
Subject: [Ntop] crash after IDLE_PURGE

 

On 3.3.10 rev 3780 - Solaris 10 x86.  Had this same problem on 3.2 on
FreeBSD...

 

Anyway, nTop blows up after an IDLE_PURGE cycle.  There was no entry in
the log this time even though I have -t 5 specified.  On FreeBSD it
would through a signal 11.

 

"One" of the reasons I updated Is to hopefully solve this problem.  I'll
run it in gdb again and post anything I find. 

 

Anyone else having this issue?  I have a lot of hosts "monitored' -
like... 12,000 ish at times.  Not sure if that's part of the problem or
why it's more apparent for me?

 

TIA!

 

Gary

 

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