EM页面出现乱码无法正常使用
EM页面出现乱码无法正常使用，重启EM服务时无法正常启动，报如下错误——
Oracle Enterprise Manager 10g Database Control Release 10.2.0.5.0 \par
Copyright (c) 1996, 2010 Oracle Corporation. All rights reserved.\par
https://hncjdb1:1158/em/console/aboutApplication\par
Starting Oracle Enterprise Manager 10g Database Control ........................\par
..................................................................... failed. \par
------------------------------------------------------------------\par
Logs are generated in directory /oracle/product/10.2.0/db_1/hncjdb1_eicdb1/sysman/log \par
……
检查$ORACLE_HOME/cfgtoollogs/emca/目录下的日志发现如下信息：
emagent.trc.N
2011-12-01 13:23:15 Thread-1594 ERROR http: 7: Unable to initialize ssl connection with server, aborting connection attempt
2011-12-01 13:23:15 Thread-1594 ERROR pingManager: nmepm_pingReposURL: Cannot connect tohttps://hncjdb1:1158/em/upload/: retStatus=-1
2011-12-01 13:23:21 Thread-1595 ERROR upload: Error in uploadXMLFiles. Trying again in 300.00 seconds.
2011-12-01 13:23:29 Thread-1596 ERROR ssl: nzos_Initialize failed, ret = 43061
emdctl.trc.N
2011-12-01 13:43:00 Thread-1 ERROR ssl: nmehlenv_openWallet failed
2011-12-01 13:43:00 Thread-1 ERROR http: 6: Unable to initialize ssl connection with server, aborting connection attempt
2011-12-01 13:44:00 Thread-1 ERROR ssl: Open wallet failed, ret = 28750
原因：
在用Enterprise Manager管理10.2.0.4和10.2.0.5版本的数据库时，因为“根证书用于安全通过安全套接字层（SSL）协议”已于2010年12月31日过期，如果客户在此之后尝试配置EM管理数据库，将导致如上错误。这个问题不影响现有的数据库控制配置。
解决办法：
打Patch 8350262补丁。具体请查阅 Metalink [ ID 1222603.1 ] 文档。