Thanks Gary Terry Martin TimeData Corporation VP of Network Operation West Coast Number 503-678-2224 Cell: 503-318-8909
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Gary Gatten Sent: Tuesday, April 14, 2009 3:31 PM To: [email protected] Subject: Re: [Ntop] NTOP is crashing - dnscache.db corruption I don't know how to reproduce it. Sometimes it runs fine for weeks before corruption, other times only days. If the dnsCache.db is only temporary - containing IP's to be resolved and NOT caching lookups that have already been resolved - then my suggestion to turn this off with a flag would obviously not work. Eventually most people would want the IP's resolved. I'm not 100% convinced the file is bad. 99%, but not 100%. Is there a tool I / we can use to determine for certain if the file is corrupted? I'm assuming there is but haven't looked into it. Maybe there's a tool for checking/fixing/packing this file occasionally? Or maybe add some trap logic in nTop to handle a broken file better - such as: if reading/writing the dnsCache.db (any file) returns a non zero return code, disable further name resolution and write error to log file. This would at least stop the crashing. Next step would be to disable resolution, try to fix the file, if successful continue resolution - if not, disable resolution and write error to log. I'll help resolve this issue however I can. Not being much of a programmer / developer I'm not sure how much benefit I can be. If you could at least point me to the source where this I/O is done I could try - or ask one of our C developers to take a look. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Luca Deri Sent: Tuesday, April 14, 2009 4:59 PM To: [email protected] Subject: Re: [Ntop] NTOP is crashing - dnscache.db corruption Hi all I see that this issue is heavily discussed. I admit that i have not followed too much this issue. Basically the problem is that the temporary DB that holds the list of hosts to be resolved gets corrupted, correct? Do you have a simple way to reproduce this problem? thanks Luca On Apr 14, 2009, at 11:41 PM, Terry Martin wrote: > Gary > > Yes I do understand that it is open source and I don't expect it to > be perfect. > > I am going to have one of my programmers see what they can do. > > > > Terry Martin > TimeData Corporation > VP of Network Operation > West Coast Number 503-678-2224 > Cell: 503-318-8909 > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf > Of Gary Gatten > Sent: Tuesday, April 14, 2009 1:52 PM > To: [email protected] > Subject: Re: [Ntop] NTOP is crashing - dnscache.db corruption > > It is opensource after all, so I'm sure someone could dig into it and > find out why it's breaking. If I knew C better I'd give it a shot, > but > it would take me 100 times longer than someone C literate, so I'm > passing on this one! > > Some months ago someone was having the problem often and was > supposed to > provide a copy of a bad db file to Luca and/or Burton. I don't know > the > status of that. > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf > Of > Ian McDonald > Sent: Tuesday, April 14, 2009 2:54 PM > To: [email protected] > Subject: Re: [Ntop] NTOP is crashing > > Terry Martin wrote: >> Gary >> >> >> >> It was 170 MB. If I disable lookups then I can't resolve IP > addresses. >> >> >> >> Boy I would like to find fix for this. >> >> >> > > You and the rest of us. > > -- > ian > _______________________________________________ > Ntop mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop > > > > > > <font size="1"> > <div style='border:none;border-bottom:double windowtext > 2.25pt;padding:0in 0in 1.0pt 0in'> > </div> > "This email is intended to be reviewed by only the intended recipient > and may contain information that is privileged and/or confidential. > If you are not the intended recipient, you are hereby notified that > any review, use, dissemination, disclosure or copying of this email > and its attachments, if any, is strictly prohibited. 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