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-rw-r--r--guides/source/api_app.md5
1 files changed, 1 insertions, 4 deletions
diff --git a/guides/source/api_app.md b/guides/source/api_app.md
index 86baa9ee84..70810d450a 100644
--- a/guides/source/api_app.md
+++ b/guides/source/api_app.md
@@ -192,7 +192,7 @@ An API application comes with the following middlewares by default:
- `Rack::Sendfile`
- `ActionDispatch::Static`
-- `Rack::Lock`
+- `ActionDispatch::LoadInterlock`
- `ActiveSupport::Cache::Strategy::LocalCache::Middleware`
- `ActionDispatch::RequestId`
- `Rails::Rack::Logger`
@@ -262,9 +262,6 @@ subsequent inbound requests for the same URL.
Think of it as page caching using HTTP semantics.
-NOTE: This middleware is always outside of the `Rack::Lock` mutex, even in
-single-threaded applications.
-
### Using Rack::Sendfile
When you use the `send_file` method inside a Rails controller, it sets the