Slow server response, slow bash commands, LUM authentications hung on server

  • 7015635
  • 08-Sep-2014
  • 30-Aug-2016

Environment

Novell Open Enterprise Server 11 (OES 11) Linux Support Pack 2
Novell Open Enterprise Server 11 (OES 11) Linux Support Pack 1
NetIQ eDirectory
Novell GroupWise 2014
Novell GroupWise

Situation

Login through SSH client just hangs.
ps -ejf hangs and does not complete listing.
Any process using a LUM connection is in a blocked or waiting state.
gstack of namcd process shows all threads waiting on a futex_wait_queue_me
Access to server is slow or slow server performance and response
Slow response with bash commands such as 'top' and others or even fail to load until the 'namcd' process is stopped

Resolution

Apply the latest Open Enterprise Server 11 (OES 11) patches via the OES update channel on Open Enterprise Server 11 (OES 11) Linux Support Pack 2
Apply the latest Open Enterprise Server 11 (OES 11) patches via the OES update channel on Open Enterprise Server 11 (OES 11) Linux Support Pack 1

Apply the patch:  oes11sp1-edirectory-887-patch6-hot-patch
RPM: novell-NLDAPbase-8.8.7.4-0.4.6.1


Cause

The eDirectory patch links in or includes the newer OpenSSL 0.9.8y libraries which fixes a deadlock condition when decoding public keys.

Additional Information

All 12 namcd process appear to be blocked behind the "futex_wait_queue_me"
call.
PID: 6326   TASK: ffff88040e5f0040  CPU: 3   COMMAND: "namcd"
 #0 [ffff88040e5f3c08] schedule at ffffffff814471d9
 #1 [ffff88040e5f3d50] futex_wait_queue_me at ffffffff8108eb95
 #2 [ffff88040e5f3d90] futex_wait at ffffffff8108ed57
 #3 [ffff88040e5f3ee0] do_futex at ffffffff810915e8
 #4 [ffff88040e5f3f00] sys_futex at ffffffff81091772
 #5 [ffff88040e5f3f80] system_call_fastpath at ffffffff81451392
    RIP: 00007f8a3507f2d4  RSP: 00007f8a3285d878  RFLAGS: 00010202
    RAX: 00000000000000ca  RBX: ffffffff81451392  RCX: 0000000000000000
    RDX: 0000000000000002  RSI: 0000000000000080  RDI: 00007f8a35b10ab0
    RBP: 0000000000000001   R8: 00007f8a35b10ab0   R9: 00000000000018b6
    R10: 0000000000000000  R11: 0000000000000246  R12: 0000000000000000
    R13: 0000000000000006  R14: 0000000000695110  R15: 00000000006950f0
    ORIG_RAX: 00000000000000ca  CS: 0033  SS: 002b

Feedback service temporarily unavailable. For content questions or problems, please contact Support.