Oracle Hang on UnixWare

SunnyXYJ

运行环境：
unixware:7.1.1
oracle:8.1.1.7

系统正常运行一个月后，数据库突然down掉。用oracle账户登陆系统时，登陆过程挂起，但是用root账户可以正常登陆进系统。可以ping通数据库服务器

oracle的日志：
alter.log
Thu May 29 11:08:51 2003
Errors in file /home/oracle/app/oracle/admin/gdsms/udump/ora_29137.trc:

ora_29137.trc:
*** SESSION ID43.35889) 2003-05-29 11:08:51.240
FATAL ERROR IN TWO-TASK SERVER: error = 12571
*** 2003-05-29 11:08:51.260
ksedmp: internal or fatal error
Current SQL statement for this session:
update sms_cas_entitleinfo_tab set started=-1, ended=-1
where started=0 and ended=0 and
(case when endtime='00000000000000' then '99991231235959' else endtime end)<
to_char(sysdate, 'YYYYMMDDHH24MISS')

listener.log:
TNS-12560: TNS:protocol adapter error
TNS-00530: Protocol adapter error
Intel SVR4 UNIX Error: 63: Out of stream resources