Eric Wong <[email protected]> wrote:
> "Yeung, Jeffrey" <[email protected]> wrote:
> > 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
> 
> Good to know, I'd just grep the installation directories for all your
> Ruby libs + gems for USR2.  I haven't seen this problem before, but it'd
> be good to document the conflict, at least.

Btw, did you ever figure out what was causing the conflict?

Pushing this out to git://bogomips.org/unicorn.git

>From 1e13ffee3469997286e65e0563b6433e7744388a Mon Sep 17 00:00:00 2001
From: Eric Wong <[email protected]>
Date: Tue, 20 Mar 2012 19:51:35 +0000
Subject: [PATCH] KNOWN_ISSUES: document signal conflicts in libs/apps

Jeffrey Yeung confirmed this issue on the mailing list.

ref: <e8d9e7ccc2621343a0a3bb45e8dedfa91c682dd...@crpmboxprd04.polycom.com>
---
 KNOWN_ISSUES |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/KNOWN_ISSUES b/KNOWN_ISSUES
index f323c68..38263e7 100644
--- a/KNOWN_ISSUES
+++ b/KNOWN_ISSUES
@@ -3,6 +3,11 @@
 Occasionally odd {issues}[link:ISSUES.html] arise without a transparent or
 acceptable solution.  Those issues are documented here.
 
+* Some libraries/applications may install signal handlers which conflict
+  with signal handlers unicorn uses.  Leaving "preload_app false"
+  (the default) will allow unicorn to always override existing signal
+  handlers.
+
 * Issues with FreeBSD jails can be worked around as documented by Tatsuya Ono:
   
http://mid.gmane.org/cahbukrj09fdxagzsefjwotexw-7jyzgjmtgup_dhjpz9vbk...@mail.gmail.com
 
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