碧海蓝天

环境：ubuntu,10.2.0.1 oracle db
现象：客户端连接数据库时长时间无响应
处理：
以oracle用户登录ubuntu主机，ps -ef | grep pmon查看后台进程，没有问题；
尝试用sqlplus /  as sysdba方式登录数据库，失败，同样无响应；
top查看系统资源占用情况，cpu user20%,sys70%，oracle用户进程平均占4%左右cpu；
怀疑由于cpu繁忙导致无响应；尝试杀掉所有oracle进程，重启数据库；
在杀掉oracle进程后；cpu资源得到释放，恢复正常，再次尝试sqlplus / as sysdba，仍然无响应；
strace sqlplus后，发现进入死循环：

times(NULL)                             = -2144584792
times(NULL)                             = -2144584792
……

跟bug：338461.1非常相像

$ strace /oracle/home/bin/sqlplus -V 2>&1 |less
……
old_mmap(NULL, 385024, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0×41794000
gettimeofday({1122996561, 411035}, NULL) = 0
access(“/usr/local/UD/conf/sqlnet.ora”, F_OK) = -1 ENOENT (No such file or directory)
access(“/usr/local/UD/lib/oracle/network/admin/sqlnet.ora”, F_OK) = -1 ENOENT (No such file or directory)
access(“/usr/local/UD/conf/sqlnet.ora”, F_OK) = -1 ENOENT (No such file or directory)
access(“/usr/local/UD/lib/oracle/network/admin/sqlnet.ora”, F_OK) = -1 ENOENT (No such file or directory)
fcntl64(-1218313656, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405

It is looping on the times() function.

解决：1. 重启主机 or  2. 打10.2.0.2补丁。