taint mode: insecure dependency in connect

[Jeff McCarrell]

Hi folks

I want to increase the number of memcache servers in our Cache::Memcached
app as my timing suggests we are seeing contention for the memcache in high
load situations.
So I changed the code to start several servers using unix sockets.
The previous code started one memcache instance using a single unix socket.

And in fact, the memcache instances are up and running.  Netstat shows the
listening sockets.

But when I try to connect to them with Cache::Memcached, I see this error:

[Wed Jun 11 20:05:57 2008] [error] Insecure dependency in connect while
running setgid at /usr/lib/perl5/site_perl/5.8.5/Cache/Memcached.pm line
203.\n

I dumped out the hash ref I¹m passing to the Memcached constructor.  It is:

$VAR1 = {
          'debug' => 1,
          'servers' => [
                         '/tmp/memd_sock_Q2mgpEt3PG',
                         '/tmp/memd_sock_uU9zYPViTl',
                         '/tmp/memd_sock_uBAK41gg1K',
                         '/tmp/memd_sock_RT4iK1FHTs',
                         '/tmp/memd_sock_YnOzI5Co8b',
                         '/tmp/memd_sock_VU4h3ThToE',
                         '/tmp/memd_sock_L4FPMPkr8r',
                         '/tmp/memd_sock_kcL6bXBam6'
                       ]
        };

which looks good to me.

The sockets were created by memcached, and are owned by apache, which is the
uid of the client.
E.g.:
srwxr-xr-x  1 apache apache 0 Jun 11 17:22 /tmp/memd_sock_Q2mgpEt3PG
which looks good to me.

Any pointers on what taint mode wants here?  I¹m puzzled.

-- jeff