From: "Yeung, Jeffrey" <Jeffrey.Yeung@polycom.com>
To: Eric Wong <normalperson@yhbt.net>,
unicorn list <mongrel-unicorn@rubyforge.org>
Subject: RE: Unicorn_rails ignores USR2 signal
Date: Mon, 12 Mar 2012 15:39:24 -0700 [thread overview]
Message-ID: <E8D9E7CCC2621343A0A3BB45E8DEDFA91C682DD23D@CRPMBOXPRD04.polycom.com> (raw)
In-Reply-To: <20120312212119.GA26451@dcvr.yhbt.net>
Hi Eric,
Sorry for the delay. It looks like disabling preload_app did the trick. A new master was created after sending the USR2. Now the $$$ question is, what in the world is intercepting the signal? :S
And this is a little late now, but here's the strace of a USR2 signal followed by a TTOU signal, with preload_app true (latter signal working okay in this case):
[pid 14542] --- SIGUSR2 (User defined signal 2) @ 0 (0) ---
[pid 14542] rt_sigreturn(0x20) = 202
[pid 14535] <... select resumed> ) = 0 (Timeout)
[pid 14535] wait4(-1, 0x7fff6bcccb9c, WNOHANG, NULL) = 0
[pid 14535] select(6, [5], NULL, NULL, {60, 0} <unfinished ...>
[pid 14542] --- SIGTTOU (Stopped (tty output)) @ 0 (0) ---
[pid 14542] rt_sigreturn(0x16) = -1 EINTR (Interrupted system call)
[pid 14553] rt_sigprocmask(SIG_SETMASK, ~[SEGV VTALRM RTMIN RT_1], NULL, 8) = 0
[pid 14553] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid 14553] tgkill(14535, 14535, SIGVTALRM) = 0
[pid 14535] <... select resumed> ) = ? ERESTARTNOHAND (To be restarted)
[pid 14535] --- SIGVTALRM (Virtual timer expired) @ 0 (0) ---
[pid 14535] rt_sigreturn(0x1a) = -1 EINTR (Interrupted system call)
[pid 14535] fcntl(6, F_GETFL) = 0x1 (flags O_WRONLY)
[pid 14535] fcntl(6, F_SETFL, O_WRONLY|O_NONBLOCK) = 0
[pid 14535] write(6, ".", 1) = 1
[pid 14535] select(6, [5], NULL, NULL, {59, 939700}) = 1 (in [5], left {59, 939696})
[pid 14535] fcntl(5, F_GETFL) = 0 (flags O_RDONLY)
[pid 14535] fcntl(5, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
[pid 14535] read(5, ".", 11) = 1
[pid 14535] wait4(-1, 0x7fff6bcccb9c, WNOHANG, NULL) = 0
[pid 14535] wait4(-1, 0x7fff6bcccb9c, WNOHANG, NULL) = 0
[pid 14535] kill(14552, SIGQUIT) = 0
[pid 14535] select(6, [5], NULL, NULL, {60, 0} <unfinished ...>
[pid 14542] --- SIGCHLD (Child exited) @ 0 (0) ---
[pid 14542] rt_sigreturn(0x11) = -1 EINTR (Interrupted system call)
[pid 14553] rt_sigprocmask(SIG_SETMASK, ~[SEGV VTALRM RTMIN RT_1], NULL, 8) = 0
[pid 14553] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid 14553] tgkill(14535, 14535, SIGVTALRM) = 0
[pid 14535] <... select resumed> ) = ? ERESTARTNOHAND (To be restarted)
[pid 14535] --- SIGVTALRM (Virtual timer expired) @ 0 (0) ---
[pid 14535] rt_sigreturn(0x1a) = -1 EINTR (Interrupted system call)
[pid 14535] fcntl(6, F_GETFL) = 0x801 (flags O_WRONLY|O_NONBLOCK)
[pid 14535] write(6, ".", 1) = 1
[pid 14535] select(6, [5], NULL, NULL, {59, 880004}) = 1 (in [5], left {59, 880001})
[pid 14535] fcntl(5, F_GETFL) = 0x800 (flags O_RDONLY|O_NONBLOCK)
[pid 14535] read(5, ".", 11) = 1
[pid 14535] wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 14552
[pid 14535] write(2, "reaped #<Process::Status: pid 14"..., 53) = 53
[pid 14535] wait4(-1, 0x7fff6bcccb9c, WNOHANG, NULL) = -1 ECHILD (No child processes)
[pid 14535] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid 14535] select(6, [5], NULL, NULL, {119, 0}
-----Original Message-----
From: Eric Wong [mailto:normalperson@yhbt.net]
Sent: Monday, March 12, 2012 2:21 PM
To: unicorn list
Cc: Yeung, Jeffrey
Subject: Re: Unicorn_rails ignores USR2 signal
Eric Wong <normalperson@yhbt.net> wrote:
> However, there's another possibility I hadn't considered, what if you
> disable preload_app? Your app or some libs it uses may be
> intercepting
> USR2 for something it does.
Ping? Was this it?
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next prev parent reply other threads:[~2012-03-12 22:39 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-09 21:48 Unicorn_rails ignores USR2 signal Yeung, Jeffrey
2012-03-09 22:24 ` Eric Wong
2012-03-09 22:39 ` Yeung, Jeffrey
2012-03-10 0:02 ` Eric Wong
2012-03-10 1:07 ` Yeung, Jeffrey
2012-03-10 1:30 ` Eric Wong
2012-03-12 21:21 ` Eric Wong
2012-03-12 22:39 ` Yeung, Jeffrey [this message]
2012-03-12 22:44 ` Eric Wong
2012-03-20 19:57 ` Eric Wong
2012-03-20 23:09 ` Yeung, Jeffrey
2012-03-21 2:27 ` Devin Ben-Hur
2012-03-30 22:16 ` Yeung, Jeffrey
2012-03-30 22:51 ` Alex Sharp
2013-05-08 18:15 ` Ryan Jones (RyanonRails)
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