lib/bolt/executor.rb in bolt-0.22.0 vs lib/bolt/executor.rb in bolt-0.23.0

@@ -38,10 +38,14 @@
       end
       @reported_transports = Set.new
 
       @noop = noop
       @run_as = nil
-      @pool = Concurrent::ThreadPoolExecutor.new(max_threads: concurrency)
+      @pool = if concurrency > 0
+                Concurrent::ThreadPoolExecutor.new(max_threads: concurrency)
+              else
+                Concurrent.global_immediate_executor
+              end
       @logger.debug { "Started with #{concurrency} max thread(s)" }
       @notifier = Bolt::Notifier.new
     end
 
     def transport(transport)