$ db2 rollforward db nsnpd to end of logs
SQL1042C An unexpected system error occurred. SQLSTATE=58004

I check the db2diag.log ,it shows:

2008-02-19-10.30.54.631297+480 I8844855G517 LEVEL: Error
PID : 1890 TID : 3005864448 PROC : db2agent (NSNPD)
INSTANCE: db2inst1 NODE : 000 DB : NSNPD
APPHDL : 0-55 APPID: *LOCAL.db2inst1.080219023054
FUNCTION: DB2 UDB, recovery manager, sqlpForwardRecovery, probe:1230
RETCODE : ZRC=0x87100027=-2028994521=SQLP_TRECTYPERR
"A record other than those expected has been read during abort"
DIA8536C A bad record type was encountered.

What's wrong with it? Thx.

You will need to call IBM support. The will probably want some trace data.