diff --git a/packstack/modules/ospluginutils.py b/packstack/modules/ospluginutils.py
index 4ee5dd165..2c9067169 100644
--- a/packstack/modules/ospluginutils.py
+++ b/packstack/modules/ospluginutils.py
@@ -89,6 +89,9 @@ def gethostlist(CONF):
 _error_exceptions = [
     # puppet preloads a provider using the mysql command before it is installed
     re.compile('Command mysql is missing'),
+    # puppet preloads a database_grant provider which fails if /root/.my.cnf
+    # this is ok because it will be retried later if needed
+    re.compile('Could not prefetch database_grant provider.*?\\.my\\.cnf'),
     # swift puppet module tries to install swift-plugin-s3, there is no such
     # pakage on RHEL, fixed in the upstream puppet module
     re.compile('yum.*?install swift-plugin-s3'),
diff --git a/tests/test_ospluginutils.py b/tests/test_ospluginutils.py
index 9b455710a..9021aca25 100644
--- a/tests/test_ospluginutils.py
+++ b/tests/test_ospluginutils.py
@@ -45,3 +45,14 @@ class OSPluginUtilsTestCase(TestCase):
         fp.close()
 
         self.assertRaises(PackStackError, validate_puppet_logfile, filename)
+
+    def test_validate_puppet_logfile_okerror(self):
+        filename = os.path.join(self.tempdir, "puppet.log")
+        fp = open(filename, "w")
+        fp.write("err: Could not prefetch database_grant provider 'mysql': "
+                 "Execution of '/usr/bin/mysql --defaults-file=/root/.my.cnf "
+                 "mysql -Be describe user' returned 1: Could not open required"
+                 " defaults file: /root/.my.cnf")
+        fp.close()
+
+        validate_puppet_logfile(filename)