oracle database 11gr2 oem故障排除案例
客户的oem出现故障,打开登录页面显示如下:
查看数据库状态与服务都是正常的。
解决问题最好的办法当然是查看后台日志报了什么错,em的日志在什么地方呢?其实很明显:
[oracle@dm01db01 trace]$ emctl status dbconsole
oracle enterprise manager 11g database control release 11.2.0.4.0
copyright (c) 1996, 2013 oracle corporation. all rights reserved.
https://xxx:1158/em/console/aboutapplication
oracle enterprise manager 11g is running.
------------------------------------------------------------------
logs are generated in directory /u01/app/oracle/product/11.2.0.4/dbhome_1/dm01db01_tequdb/sysman/log
启动、查看em状态的时候,,最后一行都会限制oem日志的位置,切换到日志目录,例如:
total 98016
-rw-r----- 1 oracle oinstall 3578020 feb 9 21:07 emagentfetchlet.log
-rw-r----- 1 oracle oinstall 3578020 feb 9 21:07 emagentfetchlet.trc
-rw-r----- 1 oracle oinstall 16736 feb 9 21:06 emagent.log
-rw-r----- 1 oracle oinstall 426000 feb 9 21:10 emagent_perl.trc
-rw-r----- 1 oracle oinstall 1247726 feb 9 21:14 emagent.trc
-rw-r----- 1 oracle oinstall 4194367 feb 8 21:01 emagent.trc.1
-rw-r----- 1 oracle oinstall 1302 feb 7 17:14 emctl.msg
-rw-r----- 1 oracle oinstall 544351 feb 9 21:35 emdb.nohup
-rw-r----- 1 oracle oinstall 0 jul 29 2014 emdctl.log
-rw-r----- 1 oracle oinstall 14412 feb 9 21:02 emdctl.trc
-rw-r----- 1 oracle oinstall 15773411 feb 9 21:11 emoms.log
-rw-r----- 1 oracle oinstall 20001650 feb 9 16:44 emoms.log.1
-rw-r----- 1 oracle oinstall 720617 feb 9 21:11 emoms.trc
-rw-r----- 1 oracle oinstall 5000504 feb 9 20:51 emoms.trc.1
-rw-r----- 1 oracle oinstall 5003162 feb 9 09:14 emoms.trc.10
-rw-r----- 1 oracle oinstall 5001267 feb 9 19:31 emoms.trc.2
-rw-r----- 1 oracle oinstall 5003639 feb 9 18:09 emoms.trc.3
-rw-r----- 1 oracle oinstall 5000450 feb 9 16:45 emoms.trc.4
-rw-r----- 1 oracle oinstall 5000447 feb 9 15:38 emoms.trc.5
-rw-r----- 1 oracle oinstall 5002270 feb 9 14:32 emoms.trc.6
-rw-r----- 1 oracle oinstall 5002974 feb 9 13:12 emoms.trc.7
-rw-r----- 1 oracle oinstall 5000153 feb 9 11:53 emoms.trc.8
-rw-r----- 1 oracle oinstall 5000000 feb 9 10:34 emoms.trc.9
-rw-r----- 1 oracle oinstall 0 jul 29 2014 nfspatchplug.log
drwxr----- 2 oracle oinstall 4096 jul 29 2014 paflogs/
-rw-r----- 1 oracle oinstall 0 jul 29 2014 patchagtstplugin.log
-rw-r----- 1 oracle oinstall 10591 jul 29 2014 secure.log
其中emoms.log记录了oem大部分的日志,查看该日志发现如下报错:
......
2015-02-09 20:29:14,242 [httpthreadgroup-10] warn jdbc.connectioncache _getconnection.353 - got a fatal exeption when getting a connection; error code = 17002; cleaning up cache and retrying
2015-02-09 20:29:14,242 [httpthreadgroup-10] error conn.connectionservice verifyrepositoryex.891 - invalid connection pool. error = io exception: unknown host specified
2015-02-09 20:29:14,243 [httpthreadgroup-10] warn jdbc.connectioncache _getconnection.352 - io exception: unknown host specified
java.sql.sqlexception: io exception: unknown host specified
......
报错非常的明显,host不能被解析,这里的host指的应该是scan-name,尝试ping 和nslookup 都失败,后来得知是客户的dns服务器出现故障,于是将scan-name对应的其中一个ip临时的加到/etc/hosts文件中,重启oem即恢复正常。
另外有关oem的配置文件存放在$oracle_home/sysman/config目录下。
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