From d5810f461f6efa80f77c4fdfff6adc54c0bc9293 Mon Sep 17 00:00:00 2001
From: MAEDA Go <maeda@farend.jp>
Date: Wed, 26 Aug 2026 18:55:36 +0900
Subject: [PATCH 1/2] Fix zombie convert process left behind when thumbnail
 generation times out.

---
 lib/redmine/thumbnail.rb | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/redmine/thumbnail.rb b/lib/redmine/thumbnail.rb
index 1951abd27..8d89ae496 100644
--- a/lib/redmine/thumbnail.rb
+++ b/lib/redmine/thumbnail.rb
@@ -66,7 +66,10 @@ module Redmine
             end
           end
         rescue Timeout::Error
-          Process.kill('KILL', pid)
+          if pid
+            Process.kill('KILL', pid)
+            Process.detach(pid)
+          end
           logger.error("Creating thumbnail timed out:\nCommand: #{cmd}")
           return nil
         end
--
2.55.0