From 719e0ad4d046d27a65d2c55db3f15a6112c468ca Mon Sep 17 00:00:00 2001
From: Sai Asish Y <say.apm35@gmail.com>
Date: Tue, 12 May 2026 21:37:38 -0700
Subject: [PATCH] fix(status): map h2 FRAME_SIZE_ERROR to Code::Internal

---
 tonic/src/status.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tonic/src/status.rs b/tonic/src/status.rs
index eeceb32b4..8d6796b20 100644
--- a/tonic/src/status.rs
+++ b/tonic/src/status.rs
@@ -400,6 +400,7 @@ impl Status {
             | Some(h2::Reason::INTERNAL_ERROR)
             | Some(h2::Reason::FLOW_CONTROL_ERROR)
             | Some(h2::Reason::SETTINGS_TIMEOUT)
+            | Some(h2::Reason::FRAME_SIZE_ERROR)
             | Some(h2::Reason::COMPRESSION_ERROR)
             | Some(h2::Reason::CONNECT_ERROR) => Code::Internal,
             Some(h2::Reason::REFUSED_STREAM) => Code::Unavailable,
@@ -1007,6 +1008,13 @@ mod tests {
         assert_eq!(source.reason(), Some(h2::Reason::CANCEL));
     }
 
+    #[test]
+    #[cfg(feature = "server")]
+    fn code_from_h2_frame_size_error() {
+        let err = h2::Error::from(h2::Reason::FRAME_SIZE_ERROR);
+        assert_eq!(Status::code_from_h2(&err), Code::Internal);
+    }
+
     #[test]
     #[cfg(feature = "server")]
     fn to_h2_error() {