diff --git a/lib/fluent/plugin_helper/server.rb b/lib/fluent/plugin_helper/server.rb
index 2a1435f339..035ffecf23 100644
--- a/lib/fluent/plugin_helper/server.rb
+++ b/lib/fluent/plugin_helper/server.rb
@@ -600,7 +600,7 @@ def on_read_without_connection(data)
           rescue => e
             @log.error "unexpected error on reading data", host: @callback_connection.remote_host, port: @callback_connection.remote_port, error: e
             @log.error_backtrace
-            close(true) rescue nil
+            close rescue nil
             raise if @under_plugin_development
           end
 
@@ -609,7 +609,7 @@ def on_read_with_connection(data)
           rescue => e
             @log.error "unexpected error on reading data", host: @callback_connection.remote_host, port: @callback_connection.remote_port, error: e
             @log.error_backtrace
-            close(true) rescue nil
+            close rescue nil
             raise if @under_plugin_development
           end
 
@@ -756,7 +756,7 @@ def on_read_without_connection(data)
           rescue => e
             @log.error "unexpected error on reading data", host: @callback_connection.remote_host, port: @callback_connection.remote_port, error: e
             @log.error_backtrace
-            close(true) rescue nil
+            close rescue nil
             raise if @under_plugin_development
           end
 
@@ -765,7 +765,7 @@ def on_read_with_connection(data)
           rescue => e
             @log.error "unexpected error on reading data", host: @callback_connection.remote_host, port: @callback_connection.remote_port, error: e
             @log.error_backtrace
-            close(true) rescue nil
+            close rescue nil
             raise if @under_plugin_development
           end