Worker is not respawn by itself yet.

rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGCHLD, NULL, {SIG_DFL, [], 0}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
nanosleep({1, 0}, {0, 319455176})       = ? ERESTART_RESTARTBLOCK (Interrupted by signal)
--- SIGCONT {si_signo=SIGCONT, si_code=SI_USER, si_pid=2310, si_uid=1000} ---
rt_sigreturn()                          = -1 EINTR (Interrupted system call)
rt_sigprocmask(SIG_BLOCK, ~[RTMIN RT_1], [], 8) = 0
getppid()                               = 24763
open("/home/vagrant/cli.php.log", O_WRONLY|O_CREAT|O_APPEND, 0666) = 3
fstat(3, {st_mode=S_IFREG|0664, st_size=540, ...}) = 0
lseek(3, 0, SEEK_CUR)                   = 0
lseek(3, 0, SEEK_CUR)                   = 0
write(3, "Restarted [ppid=24763] [pid=1441"..., 35) = 35
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, ~[RTMIN RT_1], ~[KILL STOP RTMIN RT_1], 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[KILL STOP RTMIN RT_1], NULL, 8) = 0
pipe2([3, 4], O_CLOEXEC)                = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f3956bc9a10) = 14453
close(4)                                = 0
fcntl(3, F_SETFD, 0)                    = 0
read(3, "", 8192)                       = 0
close(3)                                = 0
wait4(14453, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 14453
close(2)                                = 0
close(1)                                = 0
munmap(0x7f3956bd5000, 4096)            = 0
close(0)                                = 0
munmap(0x7f3956bd6000, 4096)            = 0
munmap(0x7f394a47c000, 2351000)         = 0
munmap(0x7f394ab13000, 2126744)         = 0
munmap(0x7f394a8e3000, 2293440)         = 0
munmap(0x7f394a6ba000, 2264288)         = 0
munmap(0x7f394ad1b000, 5075168)         = 0
munmap(0x7f394b1f3000, 2131176)         = 0
munmap(0x7f394b3fc000, 2247424)         = 0
munmap(0x7f394bb57000, 2151656)         = 0
munmap(0x7f394b621000, 5463632)         = 0
munmap(0x7f394bd65000, 2376800)         = 0
munmap(0x7f394c6f7000, 2182656)         = 0
munmap(0x7f394c4c4000, 2302848)         = 0
munmap(0x7f394cb40000, 2143176)         = 0
munmap(0x7f394c90c000, 2306080)         = 0
munmap(0x7f394cd4c000, 2164040)         = 0
munmap(0x7f394f11b000, 2205144)         = 0
munmap(0x7f394eeb0000, 2533520)         = 0
munmap(0x7f394ec9e000, 2168016)         = 0
munmap(0x7f394e344000, 2340456)         = 0
munmap(0x7f394e580000, 2761208)         = 0
munmap(0x7f394e823000, 2249096)         = 0
munmap(0x7f394df65000, 4058816)         = 0
munmap(0x7f394dcf3000, 2562832)         = 0
munmap(0x7f394ea49000, 2441952)         = 0
munmap(0x7f394d9be000, 3362112)         = 0
munmap(0x7f394d794000, 2265224)         = 0
munmap(0x7f394d586000, 2153384)         = 0
munmap(0x7f394d367000, 2220648)         = 0
munmap(0x7f394d163000, 2109720)         = 0
munmap(0x7f394cf5d000, 2117856)         = 0
munmap(0x7f3953482000, 2184320)         = 0
munmap(0x7f395321b000, 2518440)         = 0
munmap(0x7f3952fe8000, 2302208)         = 0
munmap(0x7f3952dce000, 2201000)         = 0
munmap(0x7f3952b88000, 2381504)         = 0
munmap(0x7f3952728000, 2427656)         = 0
munmap(0x7f3952979000, 2154984)         = 0
munmap(0x7f395246a000, 2872304)         = 0
munmap(0x7f39521eb000, 2616960)         = 0
munmap(0x7f3951f20000, 2927488)         = 0
munmap(0x7f3951cf1000, 2285720)         = 0
munmap(0x7f39518e2000, 2139112)         = 0
munmap(0x7f39516c7000, 2204624)         = 0
munmap(0x7f3951489000, 2347352)         = 0
munmap(0x7f3951275000, 2176008)         = 0
munmap(0x7f3951033000, 2364496)         = 0
munmap(0x7f3950e2e000, 2113648)         = 0
munmap(0x7f3950c2a000, 2109456)         = 0
munmap(0x7f3950a21000, 2130960)         = 0
munmap(0x7f3950799000, 2650544)         = 0
munmap(0x7f394fea8000, 2127304)         = 0
munmap(0x7f394f828000, 2392104)         = 0
munmap(0x7f394fa71000, 2153112)         = 0
munmap(0x7f394fc7f000, 2261152)         = 0
munmap(0x7f39502c5000, 2303048)         = 0
munmap(0x7f39504f8000, 2752816)         = 0
munmap(0x7f39500b0000, 2181216)         = 0
munmap(0x7f3951aed000, 2109896)         = 0
munmap(0x7f394f56f000, 2851544)         = 0
munmap(0x7f394f336000, 2327072)         = 0
munmap(0x7f3953698000, 2195920)         = 0
munmap(0x7f39538b1000, 2209936)         = 0
munmap(0x7f3953ee7000, 2205200)         = 0
munmap(0x7f3953cd5000, 2167536)         = 0
munmap(0x7f3954333000, 2267912)         = 0
munmap(0x7f3954102000, 2295536)         = 0
munmap(0x7f3956a87000, 1052672)         = 0
munmap(0x7f3956b88000, 266240)          = 0
munmap(0x7f3956a38000, 323584)          = 0
exit_group(0)                           = ?
+++ exited with 0 +++
[1]+  Done                    nohup php cli.php > /dev/null 2> /dev/null