Tickets :: Comment on [#4121] High Load (not ending loop) with "corrupt" imap folders

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Comment	> i played around a bit with folder creation / deletion on our imap > system with IMP. > > > > so i created a folder in the inbox called foo (names are anonymised) > and in this a subfolder called "bar. bla". > > as bar.bla should be together i realised that this creates a new > subfolder so i wanted to delete that all and create one with "bar > bla" well i could delete them, but i got then a folder in foo in the > tree displayed which had an empty name. so i tried to delete this > one. which i couldn't do anymore. so i played around a bit more > (sorry for this description but i really can't remember anything > exactly) and then i thought ok let's go back once to the INBOX let's > try it later. after i clicked on the inbox folder it loaded and > loaded and loaded. > > after a while i logged into the server, looked at top and saw that > one apache process was up to nearly 100% and the load of the machine > grew. i straced this process and saw that it is always writing into > the phpError logfile of the server. in this file i got tons of these > logmessages repeated: > > > > --- > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: INBOX.foo.bar > in /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 691 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: c in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 724 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: p in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 725 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: v in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 726 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 1328 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 1275 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 1438 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/imp/lib/IMAP/Tree.php on line 445 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/imp/lib/IMAP/Tree.php on line 445 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 1275 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: INBOX.foo.bar > in /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 691 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: c in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 724 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: p in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 725 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: v in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 726 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 1328 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: v in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 588 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: v in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 593 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: v in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 594 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: INBOX.foo.bar > in /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 691 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: c in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 724 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: p in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 725 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: v in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 726 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 1328 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 1275 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 1438 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/imp/lib/IMAP/Tree.php on line 445 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/imp/lib/IMAP/Tree.php on line 445 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 1275 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: INBOX.foo.bar > in /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 691 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: c in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 724 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: p in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 725 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: v in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 726 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: a in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 1328 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: v in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 588 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: v in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 593 > > [06-Jul-2006 16:57:04] PHP Notice: Undefined index: v in > /www/localhost/horde/lib/Horde/IMAP/Tree.php on line 594 > > ------- > > > > so the only chance to stop this was to restart apache. but after i > clicked again on INBOX (or went into the filter menu i.e.) the apache > process was again up to 100% and filling my logfiles. > > > > i could rearrange it with using thunderbird to login and delete the > folders. (even thunderbird crashed once) so the problem was mostly > because of corrupt IMAP folders i think. > > but i think it's a problem when IMP then comes into an endless queue, > push an apache process up to 100% and just fill the logfiles with php > warnings. > > > > this could be used for an attack to a webserver to lock it out.
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