From c9f0f88838f895dce7b9596ba298fb8116c4fd2c Mon Sep 17 00:00:00 2001
From: Sergei Golubchik <serg@mariadb.org>
Date: Mon, 8 Jul 2019 12:32:17 +0200
Subject: [PATCH] MDEV-19822 MariaDB 10.4 install fails on Ubuntu 18.04 if
 Prometheus mysqld_exporter is running

---
 debian/mariadb-server-10.4.preinst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/debian/mariadb-server-10.4.preinst b/debian/mariadb-server-10.4.preinst
index 032124c0fcc..560e03784f5 100644
--- a/debian/mariadb-server-10.4.preinst
+++ b/debian/mariadb-server-10.4.preinst
@@ -22,7 +22,7 @@ mysql_upgradedir=/var/lib/mysql-upgrade
 stop_server() {
     # Return immediately if there are no mysql processes running
     # as there is no point in trying to shutdown in that case.
-    if ! pgrep mysqld > /dev/null; then return; fi
+    if ! pgrep -x mysqld > /dev/null; then return; fi
 
     set +e
     systemctl stop mysql