Sebastian Hagedorn wrote:
> Hi,
>
> I've brought up this topic before. We've been running cyrus-imapd very
> happily for several years. Yet there's one issue that none of the
> updates have resolved. The last time I reported it we were running
> 2.2.12. Now we're running 2.3.8, but the issues is the same: POP and
> IMAP processes that use TLS/SSL get "stuck". My observations point
> towards dropped dial-up connections as the cause. Here's an example:
>
> [root@lvr13 root]# strace -p 4998
> Process 4998 attached - interrupt to quit
> read(0, <unfinished ...>
> Process 4998 detached
>
> In gdb:
>
> 0x003ed41e in __read_nocancel () from /lib/tls/libc.so.6
> (gdb) bt
> #0 0x003ed41e in __read_nocancel () from /lib/tls/libc.so.6
> #1 0x00c422f7 in BIO_new_socket () from /lib/libcrypto.so.4
> #2 0x00c402b2 in BIO_read () from /lib/libcrypto.so.4
> #3 0x00d26c30 in ssl3_alert_code () from /lib/libssl.so.4
> #4 0x00d26dcc in ssl3_alert_code () from /lib/libssl.so.4
> #5 0x00d280cf in ssl3_read_bytes () from /lib/libssl.so.4
> #6 0x00d28ffc in ssl3_get_message () from /lib/libssl.so.4
> #7 0x00d1ecab in ssl3_accept () from /lib/libssl.so.4
> #8 0x00d1e944 in ssl3_accept () from /lib/libssl.so.4
> #9 0x00d2dc9a in SSL_accept () from /lib/libssl.so.4
> #10 0x00d2980d in ssl23_get_client_hello () from /lib/libssl.so.4
> #11 0x00d29712 in ssl23_accept () from /lib/libssl.so.4
> #12 0x00d2dc9a in SSL_accept () from /lib/libssl.so.4
> #13 0x080a0a03 in idle_notify ()
> #14 0x0805ef21 in idle_update ()
> #15 0x08051fc6 in shut_down ()
> #16 0x0804ebe4 in ?? ()
> #17 0x08d53458 in ?? ()
> #18 0x08d61a98 in ?? ()
> #19 0x00000000 in ?? ()
> (gdb)
It looks to me like we are timing out the client while the client is
IDLEing, but we get a signal from idled in the middle of shutdown().
Try this patch.
--- imapd.c.~1.535.~ 2007-11-14 16:16:21.000000000 -0500
+++ imapd.c 2007-11-14 16:22:59.000000000 -0500
@@ -836,6 +836,8 @@
{
int i;
+ idle_done(imapd_mailbox);
+
proc_cleanup();
i = 0;
--
Kenneth Murchison
Systems Programmer
Project Cyrus Developer/Maintainer
Carnegie Mellon University
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