Hello,
I encountered very veird problem with qmail-remote hanging
indefinitelly (for over 2 weeks). Here are the details:
qmail-remote stays in ESTABLESHED state forever.
strace show that qmail-remote hangs doing: 'read(3,'
Most of hanged qmail remote are trying to deliver to outblaze.com
(or to domains using outblaze.com mail servers, s.a. mail.com)
There were couple posts to the list
(http://www.ornl.gov/its/archives/mailing-lists/qmail/2001/05/msg00558.html, and
http://www.ornl.gov/its/archives/mailing-lists/qmail/2001/05/msg01333.html)
outlining similar problem (also with outblaze). However, I had 2 qmail-remotes
get stuck on different domains.
I observed this behaviour on 2 mail servers (OS and setup is the same).
OS is Rhat 6.2
I'm at complete loss and have no idea how qmail-remote can get stuck
trying to read from fd3. After looking at qmail-remote.c, it's apparent
that qmail-remote calls timeoutread to perform network reads.
Timeoutread does select() syscall before doing read.
So, the only way we can get to read is when selected returned w/out timeout
indicating that there is data available. Then, how can 'read(3' can get stuck???
Furthermore, when I kill one of the stuck qmail-remotes, qmail tries to redeliver
the message, and either succedes or times out on remote host w/out problem.
ANY suggestions on what can be done to troubleshoot this problem are very much
appreciated.
--
Eugene Miretskiy <[EMAIL PROTECTED]>
InVision.com, INC. (631) 543-1000
www.invision.net / www.longisland.com
