On Thu, Dec 04, 2003, Ralf S. Engelschall wrote: >On Thu, Dec 04, 2003, Bill Campbell wrote: > >> While rebuilding a number of packages today, I ran into a problem where the >> rebuild failed because it couldn't log into our anonymous ftp server. It >> turned out that there were too many ftp users at the time. While I was >> tracking this down (and nuking a bunch of cracker types who were attempting >> to find misconfigured servers to exploit :-), I noticed that the >> ``rpm --rebuild ftp://...'' processes were leaving zombie sessions open. > >You mean your forked off FTP server processes stay around as zombies? >What FTP server are you using? At least with ProFTPD (which we usually >use everywhere) I've never seen this behaviour.
We're using an up-to-date version of wu-ftpd, largely because I've got it tuned the way I want, and haven't had the time to figure out how to accomplish the same things with ProFTPD. I just tried manually accessing our server using ncftp, and it doesn't recognize the ABOR command at all. It appears to be waiting for a tcp timeout. from the rpm processes. >> A bit more log parsing showed that after the RETR command, the next >> command is ABOR, not QUIT as I would expect. > >In RPM's CHANGELOG there is only: > >| 2.5.5 -> 2.5.6: >| [...] >| - attempt ftp ABOR on query/verify url's. >| [...] > >And according to the RPM rpmio/rpmio.c, the ABOR is only >sent in its ftpAbort() function and this function >is called only in this context: ... >This doesn't correspond very well to the CHANGELOG entry. Anyway, it >seems to send ABOR on non-finished transmissions when the read channel >was already closed. OTOH "QUIT" is not send at all in the code. I'm not current on the ftp specs, but at least two anon ftp servers I just tried don't recognize ``ABOR'' or ``abor'', and only recognize ``quit'' in lower case. Bill -- INTERNET: [EMAIL PROTECTED] Bill Campbell; Celestial Software LLC UUCP: camco!bill PO Box 820; 6641 E. Mercer Way FAX: (206) 232-9186 Mercer Island, WA 98040-0820; (206) 236-1676 URL: http://www.celestial.com/ ``It is better to die on your feet than to live on your knees!'' -- Emiliano Zapata. ______________________________________________________________________ The OpenPKG Project www.openpkg.org Developer Communication List [EMAIL PROTECTED]
