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标题：dns解析导致opiodr aborting process unknown ospid (7266) as a result of ORA-609类似错误

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

数据库alert日志中出现大量类似opiodr aborting process unknown ospid (7266) as a result of ORA-609错误

Tue Oct 27 07:51:10 2015
opiodr aborting process unknown ospid (7266) as a result of ORA-609
Tue Oct 27 08:16:56 2015
opiodr aborting process unknown ospid (7660) as a result of ORA-609
Tue Oct 27 08:17:16 2015
opiodr aborting process unknown ospid (7666) as a result of ORA-609
Tue Oct 27 08:21:50 2015
opiodr aborting process unknown ospid (7725) as a result of ORA-609
Tue Oct 27 08:37:43 2015
opiodr aborting process unknown ospid (7940) as a result of ORA-609
Tue Oct 27 08:51:25 2015
opiodr aborting process unknown ospid (8126) as a result of ORA-609
Tue Oct 27 09:07:16 2015
opiodr aborting process unknown ospid (8359) as a result of ORA-609
Tue Oct 27 09:26:09 2015
opiodr aborting process unknown ospid (8600) as a result of ORA-609

测试tnsping

[oracle@Sql admin]$ tnsping orcl

TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 28-OCT-2015 01:40:55

Copyright (c) 1997, 2009, Oracle.  All rights reserved.

Used parameter files:
/opt/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.162)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl.Sql.xifenfei.com)))
OK (20120 msec)
[oracle@Sql admin]$ tnsping orcl

TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 28-OCT-2015 01:42:35

Copyright (c) 1997, 2009, Oracle.  All rights reserved.

Used parameter files:
/opt/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.162)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl.Sql.xifenfei.com)))
OK (41600 msec)

hosts文件配置

[oracle@Sql admin]$ vi /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4 
192.168.2.162 Sql.xifenfei.com
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

同时测试lsnrctl start/stop/status都很慢,但是ping localhost非常快,证明问题在监听之上.search 关键字lsnrctl slow/tnsping slow关键字发现有相关文档:
Bug 8307164 : TNSPING 11G USING DNS AND NOT HOSTS FILE
Listener Startup or Connections Hang in 11g (Doc ID 803838.1)
11g: Remote Connections Take Very Long to Establish (Doc ID 856820.1)
通过这些文档,可以知道在oracle 10g中解析主机名使用gethostbyname()函数,11g中使用了使用getaddrinfo()函数.这个函数对于/etc/nsswitch.conf的调用和ethostbyname()不一样,从而出现此类问题.根据官方建议:

Linux
hosts: files [NOTFOUND=continue] dns OR  hosts:files/dns

HPUX and Solaris
ipnodes: files [NOTFOUND=continue] dns

本次解决方法
因为对于没有使用到dns服务器的数据库环境而言,没有必要配置这玩意,给自己埋雷，估计是当时安装yum之时没有清理掉

vi /etc/nsswitch.conf
hosts:      files nds  -->hosts:      files

再次测试tnsping,lsnrctl等命令,速度ok

[oracle@Sql"]$ tnsping orcl

TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 28-OCT-2015 01:58:30

Copyright (c) 1997, 2009, Oracle.  All rights reserved.

Used parameter files:
/opt/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.162)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl.Sql.xifenfei.com)))
OK (10 msec)

对于此类监听慢的问题，可以通过对client/server端trace进一步跟踪

TRACE_LEVEL_CLIENT = 16
TRACE_FILE_CLIENT = client/server
TRACE_DIRECTORY_CLIENT = [any valid directory path]
TRACE_TIMESTAMP_CLIENT = ON
DIAG_ADR_ENABLED=off