Fix memory leak, bump version

Changes.md

@@ -3,6 +3,8 @@
 4.1.2
 -----------
 
+- **IMPORTANT** Fix memory leak with worker data in Redis.
+- Freeze all string literals with Ruby 2.3. [#2741]
 - Client middleware can now stop bulk job push. [#2887]
 
 4.1.1

lib/sidekiq/launcher.rb

@@ -89,6 +89,7 @@ module Sidekiq
             Processor::WORKER_STATE.each_pair do |tid, hash|
               conn.hset(workers_key, tid, Sidekiq.dump_json(hash))
             end
+            conn.expire(workers_key, 60)
           end
         end
         fails = procd = 0

lib/sidekiq/version.rb

@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 module Sidekiq
-  VERSION = "4.1.1"
+  VERSION = "4.1.2"
 end

test/test_launcher.rb

@@ -56,6 +56,10 @@ class TestLauncher < Sidekiq::Test
           @launcher.heartbeat('identity', heartbeat_data, Sidekiq.dump_json(heartbeat_data))
         end
 
+        #after do
+          #puts system('redis-cli -n 15 keys  "*" | while read LINE ; do TTL=`redis-cli -n 15 ttl "$LINE"`; if [ "$TTL" -eq -1 ]; then echo "$LINE"; fi; done;')
+        #end
+
         it 'indicates stopping status in proctitle' do
           assert_equal "sidekiq #{Sidekiq::VERSION} myapp [1 of 3 busy] stopping", $0
         end