slapd 2.4.23 hangs on ldaps connections

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http://serverfault.com – New install of CentOS 6.3, openldap-servers-2.4.23. Generated a new certificate request, signed the cert, started slapd. ldapsearch responds on ldapi:/// and ldap:///. However, as soon as a request is made on ldaps:///, the slapd process consumes all available CPU and never responds. strace -p -ff yields the following results, in an infinite loop: [pid 5978] open("/etc/openldap/certs/server.key", O_RDONLY) = 21 [pid 5978] stat("/etc/openldap/certs/server.key", {st_mode=S_IFREG|0640, st_size=1704, ...}) = 0 [pid 5978] read(21, "-----BEGIN PRIVATE KEY-----\nMIIE"..., 1704) = 1704 [pid 59 (HowTos)