FWIW, I have seen a similar problem here on occasion, but with vsftpd instead.
When I run `ps -e -o pid,stat,comm,wchan=WIDE-WCHAN-COLUMN` I usually see one node with a single vsftpd in D (uninterruptable I/O) state, and multiple vsftpd processes on the other node, presumably waiting for the resource. I also believe this when multiple processes are trying to read & write the same file via FTP. And if left alone for a bit, other programs that may read the same file will get hung waiting as well. Mine are typically not busy waits though, but I have seen a couple that were. Sometimes I will find that all is cleared and back to normal after a short while (a timeout somewhere perhaps?). Usually the only solution is to reboot one or both nodes, which I have to instigate via kernel panic/self fence because a normal shutdown also gets caught up by the non-killable processes. I need to get a netconsole set up to capture some stuff for the next time so that I can add it to the bugzilla as well. At 10:52 AM 4/2/2010, Jason Price wrote: >Message: 1 >Date: Fri, 2 Apr 2010 11:38:24 -0400 >From: Jason Price <japr...@gmail.com> >Subject: [Ocfs2-users] Ftp server... single file seems locked >To: ocfs2-users@oss.oracle.com >Message-ID: > <p2r83f15e31004020838o961f478cg19ae4f403631...@mail.gmail.com> >Content-Type: text/plain; charset="iso-8859-1" > >I'm setting up an HA ftp server (amongst other services). > >When two connections happen simultaneously, and (more specifically) the same >user from two IP's attempt to access the same file (one for reading, and one >for writing), the processes both hang. And all subsequent attempts to >either read or write the file fail. > >The two processes that seem to have caused the lock: >user 24139 1657 Thu Apr 1 18:25:01 2010 proftpd: cbs - >::ffff:xxx.yyy.0.253: RETR prim_wo_img_dom.obs >user 24142 1657 Thu Apr 1 18:25:01 2010 proftpd: cbs - >::ffff:xxx.yyy.103.208: STOR prim_wo_img_dom.obs > >(there are 49 other process trying to do the same things, but these are the >first ones.) _______________________________________________ Ocfs2-users mailing list Ocfs2-users@oss.oracle.com http://oss.oracle.com/mailman/listinfo/ocfs2-users
