"File sharing violation."

Cause

Messages seen in db2diag.log file -

2017-01-13-11.38.44.048219-300 E140797A512 LEVEL: Warning
PID : 27721894 TID : 6684 PROC : db2sysc 0
INSTANCE: db2inst1 NODE : 000
EDUID : 6684 EDUNAME: db2logmgr (DBNM1) 0
FUNCTION: DB2 UDB, data protection services, sqlpgArchiveLogFile,
probe:3150
MESSAGE : ADM1848W Failed to archive log file "S0012919.LOG" to
"/data/db2/logarchive/db2inst1/NODE0000/C0000000/" from
"/data/db2/logs/db2inst1/NODE0000/NODE0000/".

2017-01-13-11.38.44.048516-300 E141310A635 LEVEL: Error
PID : 27721894 TID : 6684 PROC : db2sysc 0
INSTANCE: db2inst1 NODE : 000
EDUID : 6684 EDUNAME: db2logmgr (DBNM1) 0
FUNCTION: DB2 UDB, data protection services, sqlpgArchiveLogFile,
probe:3160
MESSAGE : ZRC=0x870F0016=-2029060074=SQLO_SHAR "File sharing violation."
DIA8519C A file sharing violation has occurred, filename was
"".
DATA #1 : <preformatted>
Failed to archive log file S0012919.LOG to
/data/db2/logarchive/db2inst1/NODE0000/C0000000/ from
/data/db2/logs/db2inst1/NODE0000/NODE0000/.

2017-01-13-11.38.44.048835-300 I141946A507 LEVEL: Warning
PID : 27721894 TID : 6684 PROC : db2sysc 0
INSTANCE: db2inst1 NODE : 000
EDUID : 6684 EDUNAME: db2logmgr (DBNM1) 0
FUNCTION: DB2 UDB, data protection services, sqlpgRetryFailedArchive,
probe:4780
MESSAGE : Still unable to archive log file 12919 due to rc -2029060074
for
LOGARCHMETH1 using method 1 and target
/data/db2/logarchive/db2inst1/NODE0000/C0000000/.

2017-01-13-11.38.45.049144-300 E142454A376 LEVEL: Info
PID : 27721894 TID : 6684 PROC : db2sysc 0
INSTANCE: db2inst1 NODE : 000
EDUID : 6684 EDUNAME: db2logmgr (DBNM1) 0
FUNCTION: DB2 UDB, data protection services, sqlpgArchiveLogFile,
probe:3108
DATA #1 : <preformatted>
Started archive for log file S0012919.LOG.

The ps - elf will show you more then one db2sysc processes.
A restart will clear these but soon stalled db2sysc processes are seen again.

lsof: WARNING: compiled for AIX version 6.1.3.0; this is 6.1.0.0.
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
db2sysc 9371774 db2inst1 75r VREG 174,5 122888192 20495 /data/db2/logs/db2inst1/NODE0000/NODE0000/S0012941.LOG
db2sysc 12452012 db2inst1 75r VREG 174,5 122888192 20495 /data/db2/logs/db2inst1/NODE0000/NODE0000/S0012941.LOG
db2sysc 27721894 db2inst1 75r VREG 174,5 122888192 20495 /data/db2/logs/db2inst1/NODE0000/NODE0000/S0012941.LOG
db2sysc 27721894 db2inst1 234u VREG 174,5 122888192 20495 /data/db2/logs/db2inst1/NODE0000/NODE0000/S0012941.LOG

and the ps output related to db2sysc -

F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY TIME CMD
40401 A db2inst1 9371774 27721894 0 60 20 e23360590 22688 f1000f0a10059f40 Jan 18 - 0:00 db2sysc 0
40401 A db2inst1 12452012 27721894 0 60 20 f44ef6590 22856 f1000f0a10012040 Jan 19 - 0:00 db2sysc 0
40401 A db2inst1 9371774 27721894 0 60 20 e23360590 22688 f1000f0a10059f40 Jan 18 - 0:00 db2sysc 0
40401 A db2inst1 12452012 27721894 0 60 20 f44ef6590 22856 f1000f0a10012040 Jan 19 - 0:00 db2sysc 0
40401 A db2inst1 21037266 27721894 0 60 20 a81daa590 22344 f1000f0a1003d640 Jan 14 - 0:00 db2sysc 0
240001 A db2inst1 22282288 27721894 0 60 20 d92e5b590 2652 f1000a00e318db20 Jan 12 - 0:00 db2vend (PD Vendor Process - 258)
40401 A root 22413436 27721894 0 60 20 e11c63590 1576 f10000010d0099f0 Jan 12 - 0:00 db2ckpwd 0
40401 A db2inst1 27721894 24314100 9 60 20 ee2dec590 76116 * Jan 12 - 760:43 db2sysc 0
40401 A root 30474428 27721894 0 60 20 d13153590 1640 f10000010d0099f0 Jan 12 - 0:00 db2ckpwd 0
40401 A db2inst1 33357856 27721894 0 60 20 de2c5c590 22472 f1000f0a10054440 Jan 15 - 0:00 db2sysc 0
40401 A db2inst1 33554654 27721894 0 60 20 822882590 22728 f1000f0a1003aa40 Jan 17 - 0:00 db2sysc 0
40401 A db2inst1 35717206 27721894 0 60 20 962314590 21768 f1000f0a10033f40 Jan 12 - 0:00 db2sysc 0
40401 A db2inst1 37748918 27721894 0 60 20 8d2d0f590 22344 f1000f0a10048b40 Jan 15 - 0:00 db2sysc 0
40401 A db2inst1 38076576 27721894 0 60 20 d226d0590 22664 f1000f0a10055c40 Jan 16 - 0:00 db2sysc 0
40401 A db2inst1 40239130 27721894 0 60 20 fe237c590 21896 f1000f0a1004cd40 Jan 12 - 0:00 db2sysc 0
40401 A db2inst1 42270778 27721894 0 60 20 ab2129590 21704 f1000f0a10033640 Jan 12 - 0:00 db2sysc 0
40401 A root 43188362 27721894 0 60 20 d8255a590 1512 f10000010d0099f0 Jan 12 - 0:00 db2ckpwd 0
240001 A root 13828252 1 0 60 20 b32bb3590 2324 * Nov 07 - 0:00 db2wdog 0
240001 A root 24314100 1 0 60 20 953297590 2324 * Jan 12 - 0:00 db2wdog 0

the procstack collected on all are similar to -

9371774:
0x090000000050e604 _event_sleep(??, ??, ??, ??, ??, ??) + 0x5a4
0x090000000050f098 _event_wait(??, ??) + 0x2b8
0x0900000000522b90 _rwlock_wait_local(??, ??, ??) + 0x110
0x0900000000522a30 _rwlock_wait(??, ??, ??) + 0xb0
0x0900000000523850 _rwlock_wrlock(??, ??, ??) + 0x2d0
0x09000000001c8e28 method_open(??, ??, ??, ??) + 0xa8
0x09000000000b56fc _load_secmethod(??) + 0xa9c
0x09000000000c7920 _getpwnam_shadow_r(??, ??, ??, ??, ??) + 0xaa0
0x09000000000c91cc getpwnam(??) + 0x2c
0x0900000006e79f30 vas_db2_plugin_outcall_getgroups(0x700000005bf3024, 0x110788950, 0x700000005bf3020) + 0x284
0x0900000006e7cb88 vas_db2_plugin_lookup_groups(0x700000005bf5e24, 0x300000000, 0x1149e63d5, 0x300000000, 0x0, 0x0, 0x0, 0x1149e70a8) + 0x250
0x0900000007d4a714 getgroupsforuser(char*,int,char*,int,char*,int,int,char*,int,void*,int,int,char*,int,sqlo_mem_descr*,group_functions_1*)(??, ??, ??, ??, ??, ??, ??, ??) + 0x180
0x0900000007d4a34c symbol_fixer.fdpr.107.chunk.14(??, ??, ??, ??, ??, ??, ??, ??) + 0x408
0x0900000007d49e68 sqlexSlsSystemAccrdb(db2UCinterface*)(??) + 0xd8
0x0900000007d50db4 sqlexEngAuthenticate.fdpr.chunk.9(db2UCinterface*)(??) + 0x64
0x0900000007d51eb0 sqeApplication::AppLocalStart(db2UCinterface*)(??, ??) + 0x294
0x0900000007eb1890 symbol_fixer.fdpr.20.chunk.294(??) + 0x38
0x0900000007eb1940 symbol_fixer.fdpr.25.chunk.234(0x700000005bf8320, 0x0) + 0x5c
...>>