Re: Tracking down a problem with php on FreeBSD

On 5 February 2011 21:22, Ivan Voras <ivoras@freebsd.org> wrote:
> On 5 February 2011 21:03, Ruslan Mahmatkhanov <cvs-src@yandex.ru> wrote:
>
>>
>> Can you please tell me more what you mean by ""robust" pthreads mutexes" and
>
> It's just a name for properties of a mutex; actually this is
> imprecise, what's needed here is process-shared & robust
> (fpm_shm_slots.c: FPM uses shared memory).

Actually I think "robustness" is the key here (in this context it
means that the locks of a thread / processes are released if a thread
/ process dies unexpectedly (crashes)); It is very likely that in your
case the PHP process with FPM SAPI module dies while holding a lock
shared between processes and the other processes get stuck waiting for
this lock to unlock.
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