WARNING: Subscription for node down event still pending

今天学习使用adrci工具，

[grid@bdspoc_st ~]$ adrci

ADRCI: Release 11.2.0.3.0 - Production on Fri Aug 30 14:28:14 2013

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

ADR base = "/u01/app/11.2.0"
adrci> show alert

Choose the alert log from the following homes to view:

1: diag/tnslsnr/bdspoc_st/listener
2: diag/asm/+asm/+ASM
Q: to quit

Please select option: 1

查看了下grid用户下的listener日志，发现有大量的告警出现：

2013-08-30 11:31:58.789000 +08:00WARNING: Subscription for node down event still pending

30-AUG-2013 11:31:58 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=bdspoc_st.bdstar.com)(USER=grid))(COMMAND=status)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=186647296)) * status * 0

2013-08-30 11:32:58.797000 +08:00WARNING: Subscription for node down event still pending

30-AUG-2013 11:32:58 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=bdspoc_st.bdstar.com)(USER=grid))(COMMAND=status)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=186647296)) * status * 0

2013-08-30 11:33:58.803000 +08:00WARNING: Subscription for node down event still pending

30-AUG-2013 11:33:58 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=bdspoc_st.bdstar.com)(USER=grid))(COMMAND=status)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=186647296)) * status * 0

2013-08-30 11:34:58.816000 +08:00

WARNING: Subscription for node down event still pending

30-AUG-2013 11:34:58 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=bdspoc_st.bdstar.com)(USER=grid))(COMMAND=status)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=186647296)) * status * 0
几乎是每分钟都出现警告.通过查找metalink，发现文档372959.1有相关描述：

[root@bdspoc_st ~]# cd /u01/app/11.2.0/grid/network/admin

[root@bdspoc_st admin]# ls

listener.ora listener.ora.bak.bdspoc_st samples shrept.lst sqlnet.ora

[root@bdspoc_st admin]# vim sqlnet.ora

[root@bdspoc_st admin]# vim listener.ora

添加 SUBSCRIBE_FOR_NODE_DOWN_EVENT_<listener_name>=OFF

[root@bdspoc_st admin]# su - grid

[grid@bdspoc_st ~]$ lsnrctl reload --重新载入监听信息

再次查看监听告警，WARNING警告消失。

This will prevent the messages from being written to the log file and may also prevent the TNS

Listener from hanging periodically.

Please Note: Setting SUBSCRIBE_FOR_NODE_DOWN_<listener_name> to OFF disables a necessary RAC functionality. The above workaround is recommended only for non-RAC environments.

The issue may be present in all 10g and newer installations.

我的是一个单机的asm 11.2.0.3.7的数据，所以可以修改。