When no histogram data have been pushed into redis yet, calling `Prometheus\Storage\Redis::collectHistograms` results in a PHP warning: > warning: sort() expects parameter 1 to be array, boolean given This is because $keys = $this->redis->sMembers(self::$prefix . Histogram::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX); returns `false`.
When no histogram data have been pushed into redis yet, calling
Prometheus\Storage\Redis::collectHistogramsresults in a PHP warning:This is because
$keys = $this->redis->sMembers(self::$prefix . Histogram::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX);
returns
false.