fix: add missing close when graceful shutdown (#25632)

Co-authored-by: Alex | Cosmos Labs <alex@cosmoslabs.io>

CHANGELOG.md

@@ -73,6 +73,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (collections) [#25464](https://github.com/cosmos/cosmos-sdk/pull/25464) Add `IterateRaw` method to `Multi` index type to satisfty query `Collection` interface.
 * (x/mint) [#25562](https://github.com/cosmos/cosmos-sdk/pull/25562) Improve and test `x/mint` params validation.
 * (api) [#25613](https://github.com/cosmos/cosmos-sdk/pull/25613) Separated deprecated modules into the contrib directory, distinct from api, to enable and unblock new proto changes without affecting legacy code.
+* (server) [#25632](https://github.com/cosmos/cosmos-sdk/pull/25632) Add missing call to close the app on shutdown.
 
 ### Bug Fixes
 

server/start.go

@@ -3,6 +3,7 @@ package server
 import (
 	"bufio"
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"net"
@@ -304,7 +305,7 @@ func startStandAlone(svrCtx *Context, svrCfg serverconfig.Config, clientCtx clie
 		// so we can gracefully stop the ABCI server.
 		<-ctx.Done()
 		svrCtx.Logger.Info("stopping the ABCI server...")
-		return svr.Stop()
+		return errors.Join(svr.Stop(), app.Close())
 	})
 
 	return g.Wait()
@@ -400,6 +401,7 @@ func startCmtNode(
 	cleanupFn = func() {
 		if tmNode != nil && tmNode.IsRunning() {
 			_ = tmNode.Stop()
+			_ = app.Close()
 		}
 	}