getStats() returns false when any of the servers is down

[jorgelzpz]

Hi,

I'm having some trouble with the getStats method. When any of the servers on the pool is down, getStats returns false, so statistics from the servers that are still up cannot be read.

Is this the expected behavior? I was expecting to get at least the stats for the rest of the servers, but I'm not sure if this is like that by design.

I'm using PHP 7.1.3, Memcached 3.0.3 and libmemcached 1.0.16.

Sample code:

<?php
$m = new Memcached('example');
$m->setOptions([
        Memcached::OPT_SERVER_FAILURE_LIMIT => 2,
        Memcached::OPT_RETRY_TIMEOUT => 1,
        Memcached::OPT_DISTRIBUTION => Memcached::DISTRIBUTION_CONSISTENT,
]);

// Working server
$m->addServer('127.0.0.1', '11211', 1);
var_dump($m->getStats());
var_dump($m->getVersion());
// Everything is OK

// We add a "fake" non working server
$m->addServer('127.0.0.1', '11111', 1);

var_dump($m->getStats()); // bool(false)
echo 'Message: ' . $m->getResultMessage() . "\n"; // CONNECTION FAILURE
var_dump($m->getVersion()); // bool(false)

Thank you!

[sodabrew]

Unfortunately this is expected behavior, it's happening inside of libmemcached.