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BurninLeo
Asked: 2015-04-01 02:12:11 +0800 CST

Bus error during PHP5 is running a simple script - what?

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When working with PHP scripts, I usually do not have to bother with the underlying system. Today, I have to.

A PHP script (cronjob) that has worked fine is crashing since 2 days ago. The cronjob mail as well as running the script via shell both say:

Bus-Zugriffsfehler (Speicherabzug geschrieben)

If running the same script via PHP-FPM (via nginx) I receive a Bad Gateway which probably means "I have crashed, leave me alone", as well.

Unfortunately, I have no idea how to find more information, let alone, solve the problem. I have already checked the syslog (nothing related to the issue), dmesg (nothing) and the PHP error log (nothing). I also have reinstalled php5-cli, php5-pfm, and even libc6 and restarted the server -- no effect.

By the way: The whole thing is running on a virtual server (VPS), which also limits the chances of a hardware error. PHP has been updated to php5-cli (5.5.9+dfsg-1ubuntu4.7) recently, but the script worked fine after that for 9 days and two reboots...

Any ideas? Thanks a lot!

BurninLeo

EDIT: Solution

Of course, regularly sending echo from the PHP script is not elegant - but it helps to track problems to function calls. And, of course, the one seeking help did touch something, when he told he did not...

The solution was quite simple: A static class method called itself in the first line:

class ServerManager {

    public static function dropCache() {
        ServerManager::dropCache();  // VERY STUPID
        foreach (array('active', 'packed', 'old') as $class) {
            $cacheID = 'cache-'.$class.'-0';
            Cache::drop($cacheID);
        }
    }

}

Well, maybe PHP could have been a bit more specific in the cause of the problem. Yet, removing this one solved the problem.

ubuntu

0 Answers