From bd3f2009ec4f7d1cc6a0af467178bc8fe1439b1c Mon Sep 17 00:00:00 2001
From: Mike Perham <mperham@gmail.com>
Date: Thu, 21 Oct 2021 11:39:12 -0700
Subject: [PATCH] Remove multithreaded writes to the same Array when using
 JRuby, fixes #5031

---
 lib/sidekiq/fetch.rb | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/sidekiq/fetch.rb b/lib/sidekiq/fetch.rb
index 2c3a0d2f6..c64d7bb31 100644
--- a/lib/sidekiq/fetch.rb
+++ b/lib/sidekiq/fetch.rb
@@ -79,9 +79,10 @@ def queues_cmd
       if @strictly_ordered_queues
         @queues
       else
-        queues = @queues.shuffle!.uniq
-        queues << TIMEOUT
-        queues
+        permute = @queues.shuffle
+        permute.uniq!
+        permute << TIMEOUT
+        permute
       end
     end
   end