Session: Error while trying to free lock for ci_session

Hi, I'm trying to debug this strange issue.. I can reproduce it with many curl request parallelized with xargs -P, I can't figure out why sometimes a session lock is deleted while is used (when the wrong release occurs, the TTL on the lock key is -2).

A stupid workaround, while I'm digging into code is to randomize the time to wait in Session_redis_driver.php, line 340 instead of:

PHP Code:

sleep(1); 


replace with:

PHP Code:

$sleep_random = rand(100000,500000);
usleep(500000+$sleep_random); 


In this way I reduce a lot the "Error while trying to free lock.." occurence, before that i can reproduce the error with 8-12 concurrent request, now I have to raise up to 64 parallel request.

I hope it helps

k.