Distributed Lock Check

Analyze PHP code for distributed locking anti-patterns that cause deadlocks, race conditions, and resource starvation in multi-instance deployments.

Detection Patterns

1. Missing TTL on Locks

<?php

declare(strict_types=1);

// BAD: Lock without expiration -- if process dies, lock is held forever
final readonly class CacheRefreshService
{
    public function refresh(string $key): void
    {
        $this->redis->set('lock:' . $key, '1');