[imp] Re: Apache server eating up CPU time

[Jochen Roderburg]

Zitat von Jochen Roderburg <Roderburg at uni-koeln.de>:

> But now suddenly we observe an increasing number of Apache server processes
> which seem to do nothing else than consuming CPU time. These keep on running
> until we kill them separately or restart the whole server. We did a little
> tracing and debugging which showed they do not do any system calls but loop
> somewhere in the PHP module. They seem to be connected to PHP sessions which
> are not closed regularily.

After a week we finally found the strange cause for our troubles:

Our mail people had made some tests on our Cyrus IMAP server and had generated a
user and files/folders with the name "user.a0000" (on a system where the
hierarchy delimiter is "/").

For some unknown reason (maybe even a Cyrus bug) this had the consequence that
in folder listings from the server a line with "Shared Folders/user.a0000"
appeared twice.

And now at the end we have indeed a IMP question: Could this (the unusual name
or the double appearence) lead to a loop in IMP in the Folder Tree listing
(that was the place where the sessions hung)?

IMP/Horde versions:
Horde 2.2.7
IMP 3.2.6
Turba 1.2.2

Jochen Roderburg
ZAIK/RRZK
University of Cologne
Robert-Koch-Str. 10                 Tel.:   +49-221/478-7024
D-50931 Koeln                       E-Mail: Roderburg at rrz.Uni-Koeln.DE
Germany