Re: Fork and zombies

Waynn Lue wrote: > I periodically run a script that makes a call against a remote API, > which > takes some time to return. In an attempt to increase thoroughput, I > decided to investigate using pnctl_fork to spawn off multiple > processes to make the call, since the slowest part is the network part > of it (and waiting for the > server response). I ended up writing a script that did this: > > $pid = pnctl_fork(); > if ($pid == -1) { > die('could not fork'); > } else if ($pid) { > echo "parent $pid\n"; > return; > } else { > // make API call > } > > While this works, it unfortunately leaves behind a zombie process > every single time. You need to call pcntl_wait() or pcntl_waitpid(). /Per -- Per Jessen, Zürich (4.2°C)