Fetch Redis server info for sentinel replicated connections

Author: yatsukhnenko

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## Unreleased
+
+- Fixed issue with Predis and `SentinelReplication` connection
+
 ## 2.5.3
 
 - Added `WP_REDIS_DISABLE_GROUP_FLUSH` constant

includes/object-cache.php

@@ -1147,8 +1147,8 @@ public function fetch_info() {
             $info = $this->is_predis()
                 ? $this->redis->getClientBy( 'id', $connectionId )->info()
                 : $this->redis->info( $connectionId );
-        } else if ($this->is_predis() && $this->redis->getConnection() instanceof Predis\Connection\Replication\MasterSlaveReplication) {
-            $info = $this->redis->getClientBy( 'role' , 'master' )->info();
+        } else if ($this->is_predis() && $this->redis->getConnection() instanceof Predis\Connection\Replication\ReplicationInterface) {
+            $info = $this->redis->getMaster()->info();
         } else {
             $info = $this->redis->info();
         }