Problem - Server operation terminated

This morning I came in to find that our ADSM server was disappeared.
In /usr/lpp/adsmserv/bin two (new) files were found:

/usr/lpp/adsmserv/bin/core and
/usr/lpp/adsmserv/bin/dsmserv.err, which looks like:

08/22/1997 19:35:43  ANR7846S Thread 43888: pkBroadcastCondition error, object 
6842: Bad Mutex object.
Thread Information at  08/22/1997 19:35:43

  MaxProcesses=250, NumProcesses=49, NumZombies=0

Thread Table

08/22/1997 19:35:43  Thread  0: main
08/22/1997 19:35:43     Pid=44434, Result=0, Joining=0, Detached=0, Zombie=0
08/22/1997 19:35:43  Thread  1: LvmDiskServer
08/22/1997 19:35:43     Pid=34452, Result=0, Joining=0, Detached=1, Zombie=0
..
..
08/22/1997 19:35:43  Thread 50: SsAuxThread
08/22/1997 19:35:43     Pid=45682, Result=0, Joining=0, Detached=1, Zombie=0
08/22/1997 19:35:43
ANR7838S Server operation terminated.
08/22/1997 19:35:43    0x100060E4 TrapSyncError
08/22/1997 19:35:43    0x100058E0 pkBroadcastCondition
08/22/1997 19:35:43    0x1011FE40 AfCopyCancel
08/22/1997 19:35:43    0x100229BC procCancelProcess
08/22/1997 19:35:43    0x100D89B0 AsWaitMP
08/22/1997 19:35:43    0x100CCF20 AsSetupRtrv
08/22/1997 19:35:43    0x100C2F9C ssRtrv
08/22/1997 19:35:43    0x10138BB4 AfRtrv
08/22/1997 19:35:43    0x101540D8 bfRtrv
08/22/1997 19:35:43    0x1010E5B4 RetrieveBitfile
08/22/1997 19:35:43    0x1010C82C DoMigrRtrv
08/22/1997 19:35:43    0x1010677C SmNodeSession
08/22/1997 19:35:43    0x10098124 DoNodeGeneral
08/22/1997 19:35:43    0x100975F8 smExecuteSession
08/22/1997 19:35:43    0x1028512C SessionThread
08/22/1997 19:35:43    0x10004A34 pkBeginNamedThread
08/22/1997 19:35:43    0x10284B8C AcceptorThread
08/22/1997 19:35:43    0x10004A34 pkBeginNamedThread
08/22/1997 19:35:43    0x10283FB4 tcpInit
08/22/1997 19:35:43    0x10094978 psCommInit
08/22/1997 19:35:43    0x1001FE04 admStartServer
08/22/1997 19:35:43    0x100008B8 main

After restarting the server, everything looks normal. Thank God!
The ADSM activity around the time was quit normal, some HSM activity,
two backup-clients and Space reclamation.

Has anyone seen this before?

(running ADSM V2.1.0.13 on a SP2 (AIX 4.1.4.0) using 3494 with 4 3590 units,
 backup/archive client's 2.1.0.6 on AIX 3.2, AIX 4.1.4, SunOs, Solaris,
 IRIX, Win95, WinNT, HSM client's 2.1.0.6 on AIX 4.1.4.0)

Regards,

Henk ten Have                   SARA, Academic Computing Services Amsterdam
Systems Programmer              Kruislaan 415
E-mail: hthta AT sara DOT nl           1098 SJ Amsterdam
Phone : +31205923000            The Netherlands