警告:Memcache :: get()[memcache.get]:节点不再存在 [英] Warning: Memcache::get() [memcache.get]: Node no longer exists

问题描述

我是memcached的新手，但我确实需要在网站上快速修复此错误

I am new to memcached but I do need to fix this error quick on the website

我不知道该在哪里插入?

I don't know where to cut in?

我能做些什么来找出哪个节点或键的memcached失败了?

Anything that I can do to find out which node or key memcached failed to get?

我可以查看任何日志文件吗?

Any log files can I look into?

推荐答案

当您存储的对象具有对资源的引用(例如文件描述符或数据库连接)时，会发生这种情况.如果您获得的对象属于从memcached获取对象时未加载的类，则也会发生这种情况.

This occurs when you store an object which has references to recources such as file descriptors or database connections. It can also occur if the object you get is of a class which isn't loaded when you get it from memcached.

要找出哪个memcached密钥失败，可以在调用Memcached :: get之前设置一个自定义错误处理程序，该错误处理程序可以访问memcached密钥，然后再将其恢复.然后，您可以将警告与密钥一起记录.

To find out which memcached key fails, you could set a custom error handler, which can access the memcached key, just before the call to Memcached::get and restore it afterwards. Then you can log the warning together with the key.

这是一个示例:

<?
class MyMemcachedWrapper {

    private $key;

    public function get($key) {

        // Save the key in an instance variable so it will be available in
        // the error handler
        $this->key = $key;

        set_error_handler(array($this, 'handleError'));
        $value = Memcached::get($key);
        restore_error_handler();

        return $value;
    }

    public function handleError($errno, $errstr) {

        // Here we have both the key and the error message from memcached
        $message = "Memcached error '$errstr' while fetching key '{this->key}'";

        // ... and we can log it to a file or db or something
        file_put_contents("memcached-errors.log", $message, FILE_APPEND);
    }
}

// Then use it like this
$memcached_wrapper = new MyMemcachedWrapper();
$value = $memcached_wrapper->get('xyz');

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