diff --git a/build/build.sh b/build/build.sh
index 31e0d24..cd11575 100755
--- a/build/build.sh
+++ b/build/build.sh
@@ -43,6 +43,10 @@ function build() {
 	echo "building ..."
 	env GOOS=${OS} GOARCH=${ARCH} go build -o $DIST/bin/${NAME} -ldflags="-s -w" $ROOT/../cmd/edge-node/main.go
 
+	# delete hidden files
+	find $DIST -name ".DS_Store" -delete
+	find $DIST -name ".gitignore" -delete
+
 	echo "zip files"
 	cd "${DIST}/../" || exit
 	if [ -f "${ZIP}" ]; then
diff --git a/internal/rpc/rpc_client.go b/internal/rpc/rpc_client.go
index a595192..8e63464 100644
--- a/internal/rpc/rpc_client.go
+++ b/internal/rpc/rpc_client.go
@@ -190,6 +190,11 @@ func (this *RPCClient) pickConn() *grpc.ClientConn {
 		if len(availableConns) > 0 {
 			return availableConns[rands.Int(0, len(availableConns)-1)]
 		}
+
+		// 关闭
+		for _, conn := range this.conns {
+			_ = conn.Close()
+		}
 	}
 
 	// 重新初始化