RAC 10.2.0.5，客户端登陆间断遭遇ORA-12545

ping 192.168.1.171 -t 

tnsping 192.168.1.171 1000 

[oracle@rac1-server ~]$ more /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6
192.168.1.171   rac1-server
192.168.1.172   rac1-server-vip

192.168.1.173   rac2-server
192.168.1.174   rac2-server-vip

10.10.10.171    rac1-server-priv
10.10.10.173    rac2-server-priv
[oracle@rac1-server ~]$ 

[oracle@rac1-server admin]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.5.0 - Production on Tue May 20 08:19:43 2014

Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options

SQL> show parameter name

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
db_file_name_convert                 string
db_name                              string      jy
db_unique_name                       string      jy
global_names                         boolean     FALSE
instance_name                        string      jy1
lock_name_space                      string
log_file_name_convert                string
service_names                        string      jy.oracle.com
SQL> 

[oracle@rac1-server admin]$ lsnrctl status

LSNRCTL for Linux: Version 10.2.0.5.0 - Production on 20-MAY-2014 07:58:46

Copyright (c) 1991, 2010, Oracle.  All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER_RAC1-SERVER
Version                   TNSLSNR for Linux: Version 10.2.0.5.0 - Production
Start Date                20-MAY-2014 07:06:32
Uptime                    0 days 0 hr. 52 min. 14 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /s01/oracle/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File         /s01/oracle/product/10.2.0/db_1/network/log/listener_rac1-server.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.172)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.171)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
Services Summary...
Service "+ASM" has 1 instance(s).
  Instance "+ASM1", status BLOCKED, has 1 handler(s) for this service...
Service "+ASM_XPT" has 1 instance(s).
  Instance "+ASM1", status BLOCKED, has 1 handler(s) for this service...
Service "jy.oracle.com" has 2 instance(s).
  Instance "jy1", status READY, has 2 handler(s) for this service...
  Instance "jy2", status READY, has 1 handler(s) for this service...
Service "jyXDB.oracle.com" has 2 instance(s).
  Instance "jy1", status READY, has 1 handler(s) for this service...
  Instance "jy2", status READY, has 1 handler(s) for this service...
Service "jy_XPT.oracle.com" has 2 instance(s).
  Instance "jy1", status READY, has 2 handler(s) for this service...
  Instance "jy2", status READY, has 1 handler(s) for this service...
The command completed successfully
[oracle@rac1-server admin]$  

[oracle@rac1-server admin]$ oerr ora 12545
12545, 00000, "Connect failed because target host or object does not exist"
// *Cause: The address specified is not valid, or the program being
// connected to does not exist.
// *Action: Ensure the ADDRESS parameters have been entered correctly; the
// most likely incorrect parameter is the node name.  Ensure that the
// executable for the server exists (perhaps "oracle" is missing.)
// If the protocol is TCP/IP, edit the TNSNAMES.ORA file to change the
// host name to a numeric IP address and try again.
[oracle@rac1-server admin]$