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@@ -103,6 +103,10 @@ Low-level changes
RPC
---
+- The RPC server can process a limited number of simultaneous RPC requests.
+ Previously, if this limit was exceeded, `bitcoind` would respond with
+ [status code 500 (`HTTP_INTERNAL_SERVER_ERROR`)](https://en.wikipedia.org/wiki/List_of_HTTP_status_codes#5xx_server_errors).
+ Now it returns status code 503 (`HTTP_SERVICE_UNAVAILABLE`). (#18335)
Tests
-----