PHP CLI脚本在cron死于捕获的异常时运行

Question

我有一个以cron身份运行的PHP脚本。抛出异常时，它会执行catch块然后死掉。如果我在cli中运行相同的脚本，而不是作为cron作业，它将运行catch块并继续运行脚本的其余部分。知道为什么会这样吗？

以下是引发异常的地方：

public static function concurrentGet($urlList, $callback, $passthrough = null) {
    //init the guzzle client
    $client = new Client([
        "headers" => [
            "Accept" => "text/html,text/json,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
            "Accept-Encoding" => "gzip, deflate, sdch",
            "Accept-Language" => "en-US",
            "Cache-Control" => "no-cache",
            "Connection" => "keep-alive",
            "Pragma" => "no-cache",
            "User-Agent" => "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36"
        ],
        'debug' => false,
        "verify" => false,
        "cookies" => true
    ]);
    //this function is called by the pool to generate request objects
    $requests = function ($urlList) {
        foreach ($urlList as $url) {
            yield new Request('GET', $url);
        }
    };
    //execute the pool of requests
    $pool = new Pool($client, $requests($urlList), [
        'concurrency' => 5,
        'fulfilled' => function ($response, $index) use ($urlList, $callback, $passthrough) {
            $url = $urlList[$index];
            //$app['logger']->info("GET: $url...");
            $body = $response->getBody()->getContents();

            //call passed callback
            call_user_func(
                $callback,
                $body,
                $url,
                $passthrough
            );

        },
        'rejected' => function (\Exception $reason, $index) use ($urlList, $callback, $passthrough) {
            $url = $urlList[$index];
            echo "REJECT: ".$url."\n";
            //echo "REASON: ".$reason."\n"; 

            throw $reason;

        },
    ]);

以下是它的捕获方式：

                try {
                $report->concurrentGet($report->OSRMRequests, [$report, 'OSRMCallback']);
            } catch (\Exception $e) {
                //send to airbrake
                Airbrake\Instance::notify($e);
                //log to internal application log
                $app['errorLog']->error($e->getMessage());

            }

*/1 * * * * /usr/bin/php ~/Projects/easyivmr/bin/console createreport >> /var/log/ivmr_report.log

我正在运行Ubuntu 16.04.03 LTS。