Use a RedisLock to avoid race conditions.

src/Statistics/Logger/RedisStatisticsLogger.php

@@ -5,6 +5,7 @@ namespace BeyondCode\LaravelWebSockets\Statistics\Logger;
 use BeyondCode\LaravelWebSockets\Apps\App;
 use BeyondCode\LaravelWebSockets\Statistics\Drivers\StatisticsDriver;
 use BeyondCode\LaravelWebSockets\WebSockets\Channels\ChannelManager;
+use Illuminate\Cache\RedisLock;
 use Illuminate\Support\Facades\Cache;
 
 class RedisStatisticsLogger implements StatisticsLogger
@@ -115,6 +116,7 @@ class RedisStatisticsLogger implements StatisticsLogger
      */
     public function save()
     {
+        $this->lock()->get(function () {
             foreach ($this->redis->smembers('laravel-websockets:apps') as $appId) {
                 if (! $statistic = $this->redis->hgetall($this->getHash($appId))) {
                     continue;
@@ -133,6 +135,7 @@ class RedisStatisticsLogger implements StatisticsLogger
                     ? $this->resetAppTraces($appId)
                     : $this->resetStatistics($appId, $currentConnectionCount);
             }
+        });
     }
 
     /**
@@ -190,4 +193,14 @@ class RedisStatisticsLogger implements StatisticsLogger
     {
         return "laravel-websockets:app:{$appId}";
     }
+
+    /**
+     * Get a new RedisLock instance to avoid race conditions.
+     *
+     * @return \Illuminate\Cache\CacheLock
+     */
+    protected function lock()
+    {
+        return new RedisLock($this->redis, 'laravel-websockets:lock', 0);
+    }
 }