From 2dd3e3b6eec4fb36a840b9abc22b135f435c11d4 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Tue, 17 Mar 2026 20:50:44 -0700
Subject: [PATCH] Include server ID in maintenance mode error matching Go's
 format

Go returns "volume server %s is in maintenance mode" with the
store ID. Rust was returning a generic "maintenance mode" message.
---
 seaweed-volume/src/server/volume_server.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/seaweed-volume/src/server/volume_server.rs b/seaweed-volume/src/server/volume_server.rs
index 5a01f412e..8cdf1c74d 100644
--- a/seaweed-volume/src/server/volume_server.rs
+++ b/seaweed-volume/src/server/volume_server.rs
@@ -107,7 +107,11 @@ impl VolumeServerState {
     /// Check if the server is in maintenance mode; return gRPC error if so.
     pub fn check_maintenance(&self) -> Result<(), tonic::Status> {
         if self.maintenance.load(Ordering::Relaxed) {
-            return Err(tonic::Status::unavailable("maintenance mode"));
+            let id = self.store.read().unwrap().id.clone();
+            return Err(tonic::Status::unavailable(format!(
+                "volume server {} is in maintenance mode",
+                id
+            )));
         }
         Ok(())
     }