getStats issue with OPT_BINARY_PROTOCOL and OPT_NO_BLOCK

[ssigwart]

The following code hangs and causes high CPU usage.

$memcached = new Memcached();
$memcached->setOption(Memcached::OPT_NO_BLOCK, true);
$memcached->setOption(Memcached::OPT_BINARY_PROTOCOL, true);
$memcached->addServer('127.0.0.1', 11211, 100);
print_r($memcached->getStats());

I'm using:
PHP: 5.6.29
memcached: 2.2.0
libmemcached: 1.0.18

[sodabrew]

Confirmed this still fails with php-memcached 3.0.3 and PHP 7.1. The OPT_NO_BLOCK setting is what triggers the problem. Thanks for reporting this!

Note that I might not backport a fix to the 2.x series for PHP 5.x, time permitting.

[mtibben]

Just ran into this using Symfony 3.3 Cache Component which sets OPT_NO_BLOCK by default