Command limit when using runtime API?

Hi, I am using the runtime API to add/remove/modify entries in map files as described in this blog post, and it works fine for small numbers of commands at a time, but if there are too many commands at once I usually get an error after a few hundred commands have been processed:

2022/02/01 03:15:38 socat[29468] E write(5, 0x55f4b129ee30, 67): Broken pipe

This happens when using echo | socat from the command line, for example:

for n in {1..500}; do echo "add map /etc/haproxy/test.map /test$n -"; done | socat stdio /run/haproxy.stat

And also if using the following perl code:

    foreach my $kr (sort keys %filemap) {
        push( @changes, "add map $mapfile $kr " . $filemap{$kr} );
    }

    # open new connection to haproxy socket
    my $writesock = new IO::Socket::UNIX (
        Peer => '/run/haproxy.stat',
        Type => SOCK_STREAM,
    );
    if ( ! $writesock ) {
        syslog('warning',"unable to connect to haproxy socket");
        return;
    }
    print $writesock join("\n",@changes) . "\n";
    close $writesock;

If I add a sleep(3) before the close $writesock in the perl code the issue seems to go away, but I wonder if there’s something else I should be doing.

\Should I be limiting the number of commands given at once, or doing something else with the socket before closing it?

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