child_process: Plug file descriptor leak

Pipes for child processes aren't closed explicitly after exiting child processes. Fix #3627 Signed-off-by: Takuro Ashie <[email protected]>
fluent · Aug 9, 2022 · e9a9294 · e9a9294
1 parent 0ee8322
commit e9a9294
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/lib/fluent/plugin_helper/child_process.rb b/lib/fluent/plugin_helper/child_process.rb
@@ -346,6 +346,9 @@ def child_process_execute_once(
           if cb
             cb.call(process_info.exit_status) rescue nil
           end
+          process_info.readio&.close
+          process_info.writeio&.close
+          process_info.stderrio&.close
         end
         thread[:_fluentd_plugin_helper_child_process_running] = true
         thread[:_fluentd_plugin_helper_child_process_pid] = pid