[root@localhost a]# runc start x
could not create session key: too many links
Container start failed: [10] System error: could not synchronise with container process
[root@localhost a]# uname -a
Linux localhost.localdomain 2.6.32-573.7.1.el6.x86_64 #1 SMP Tue Sep 22 22:00:00 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost a]# runc -v
runc version 0.0.9
spec version 0.4.0

2564  <... select resumed> )            = 0 (Timeout)
2563  keyctl(0x1, 0xc82004b4f0, 0, 0, 0 <unfinished ...>
2564  select(0, NULL, NULL, NULL, {0, 20} <unfinished ...>
2563  <... keyctl resumed> )            = -1 EMLINK (Too many links)
2563  write(3, "{\"type\":1}", 10)      = 10