Gary for very long time I'm considering to drop gdbm in favour of a more reliable and 'real' DB like sqlite. gdbm is very rude and whevener there's a problem it either crashes or exits.
I'll do my best to start migrating to sqlite soon and see if this is enough or if there's a problem on ntop too. Stay tuned Luca On Apr 15, 2009, at 12:31 AM, Gary Gatten wrote: > 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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