Ignore closed-terminal log errors in Puma plugin shutdown

lib/puma/plugin/solid_queue.rb

@@ -129,5 +129,8 @@ def puma_dead?
 
     def log(...)
       log_writer.log(...)
+    rescue Errno::EIO
+      # The controlling terminal can disappear before the monitor thread shuts
+      # down the child process. Keep shutdown moving even when logging cannot.
     end
 end

test/unit/puma_plugin_test.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+require "test_helper"
+require "puma/plugin/solid_queue"
+
+class PumaPluginTest < ActiveSupport::TestCase
+  class ClosedTerminalLogWriter
+    def log(...)
+      raise Errno::EIO
+    end
+  end
+
+  test "monitor still stops the process when shutdown logging fails" do
+    plugin = Puma::Plugins.find("solid_queue").new
+    plugin.instance_variable_set(:@log_writer, ClosedTerminalLogWriter.new)
+
+    plugin.stubs(:puma_dead?).returns(true)
+    Process.expects(:kill).with(:INT, Process.pid)
+
+    plugin.send(:monitor, :puma_dead?, "Detected Puma has gone away, stopping Solid Queue...")
+  end
+end