I'm running unittest scripts and for test case setup I need to run shell command from time to time. As a result shell command is run around 50 times during unittest execution.
It works ok on CentOS release 6.6 (Final) server but doesn't work on Ubuntu 14.04.3 LTS.
The problem is that after around 20th time shell script execution I get the following error:
exec(): Unable to fork [$(which mysql) -u user -ppwd test_db < "/opt/jenkins/workspace/some - project/application/../tests/Application/assets/sql/test_db.sql" 2> /dev/null]
I've checked all the topics around the internet and no one helped me. I've increased process number and open files limit to enormous values
# ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 3885 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 100000 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 6553500 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited
PHP reports similar numbers. (file test.php contains
<?php echo system("ulimit -a");)
# php test.php time(seconds) unlimited file(blocks) unlimited data(kbytes) unlimited stack(kbytes) 8192 coredump(blocks) 0 memory(kbytes) unlimited locked memory(kbytes) 64 process 6553500 nofiles 100000 vmemory(kbytes) unlimited locks unlimited locks unlimited
I run scripts as a non-root user from CLI.
I've increased php memory size to 2Gb
memory_limit => 2048M => 2048M
I've tried to use system, passthrough, shel_exec and it makes not difference.
PHP version is 5.6
PHP 5.6.14-1+deb.sury.org~trusty+1 (cli)
Does anybody know how to solve the problem?