fix: do not kill tendermint process

go.mod

@@ -48,6 +48,7 @@ require (
 	github.com/cosmos/gogoproto v1.4.11
 	github.com/go-git/go-git/v5 v5.11.0
 	github.com/gofrs/uuid v4.4.0+incompatible
+	github.com/gogo/protobuf v1.3.2
 	github.com/google/uuid v1.4.0
 	github.com/oasisprotocol/curve25519-voi v0.0.0-20220708102147-0a8a51822cae
 	github.com/vektra/mockery/v2 v2.23.1
@@ -137,7 +138,6 @@ require (
 	github.com/gobwas/glob v0.2.3 // indirect
 	github.com/gofrs/flock v0.8.1 // indirect
 	github.com/gofrs/uuid/v5 v5.0.0 // indirect
-	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/glog v1.1.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/snappy v0.0.4 // indirect

proxy/multi_app_conn.go

@@ -5,7 +5,6 @@ import (
 
 	abcicli "github.com/KYVENetwork/cometbft/v38/abci/client"
 	cmtlog "github.com/KYVENetwork/cometbft/v38/libs/log"
-	cmtos "github.com/KYVENetwork/cometbft/v38/libs/os"
 	"github.com/KYVENetwork/cometbft/v38/libs/service"
 )
 
@@ -131,10 +130,11 @@ func (app *multiAppConn) killTMOnClientError() {
 		logger.Error(
 			fmt.Sprintf("%s connection terminated. Did the application crash? Please restart CometBFT", conn),
 			"err", err)
-		killErr := cmtos.Kill()
-		if killErr != nil {
-			logger.Error("Failed to kill this process - please do so manually", "err", killErr)
-		}
+		// Do not kill tendermint process to enable KSYNC to continue running during upgrades
+		//killErr := cmtos.Kill()
+		//if killErr != nil {
+		//	logger.Error("Failed to kill this process - please do so manually", "err", killErr)
+		//}
 	}
 
 	select {