重启机器后，发现可以启动Informatica PowerCenter,但是在HTTPS连接时，无法连上JBOSS。
查看\informatica\tomcat\node.log 的日志
2012-12-14 15:09:12,078 ERROR [main] [PCSF_10375] Failed to fetch [Domain] with error [[informatica][Oracle JDBC Driver][Oracle]ORA-01033: ORACLE initialization or shutdown in progress
].
java.sql.SQLException: [informatica][Oracle JDBC Driver][Oracle]ORA-01033: ORACLE initialization or shutdown in progress
2012-12-14 15:09:12,078 FATAL [main] [NODE_10026] Unable to load domain [Domain_abc-ed6b3fb4ff4] configuration database because: [[PCSF_10375] Failed to fetch [Domain] with error [[informatica][Oracle JDBC Driver][Oracle]ORA-01033: ORACLE initialization or shutdown in progress
].].
com.informatica.pcsf.common.exception.PCSFConfigException: [PCSF_10375] Failed to fetch [Domain] with error [[informatica][Oracle JDBC Driver][Oracle]ORA-01033: ORACLE initialization or shutdown in progress
].
2012-12-14 15:09:12,078 FATAL [main] [NODE_10026] Unable to load domain [Domain_abc-ed6b3fb4ff4] configuration database because: [[PCSF_10375] Failed to fetch [Domain] with error [[informatica][Oracle JDBC Driver][Oracle]ORA-01033: ORACLE initialization or shutdown in progress
].].
com.informatica.pcsf.common.exception.PCSFConfigException: [PCSF_10375] Failed to fetch [Domain] with error [[informatica][Oracle JDBC Driver][Oracle]ORA-01033: ORACLE initialization or shutdown in progress
].
2012-12-14 15:09:12,078 FATAL [main] [NODE_10016] Node configuration failed to initialize with error: [[PCSF_10375] Failed to fetch [Domain] with error [[informatica][Oracle JDBC Driver][Oracle]ORA-01033: ORACLE initialization or shutdown in progress
].].
com.informatica.pcsf.common.exception.PCSFConfigException: [PCSF_10375] Failed to fetch [Domain] with error [[informatica][Oracle JDBC Driver][Oracle]ORA-01033: ORACLE initialization or shutdown in progress
].
2012-12-14 15:09:12,078 FATAL [main] [NODE_10016] Node configuration failed to initialize with error: [[PCSF_10375] Failed to fetch [Domain] with error [[informatica][Oracle JDBC Driver][Oracle]ORA-01033: ORACLE initialization or shutdown in progress
].].
com.informatica.pcsf.common.exception.PCSFConfigException: [PCSF_10375] Failed to fetch [Domain] with error [[informatica][Oracle JDBC Driver][Oracle]ORA-01033: ORACLE initialization or shutdown in progress
].
显而易见，ORACLE 无法连接上。再回过头检查ORACLE ，发现ORACLE 实例出于启动状态，但是DATABASE 是shutdown .
使用命令alter database open; 数据库无法启动，提示redo log 损坏。
进一步DEBUG 查看alter.log 文件，发现是redo log顺坏的原因是 存储redo.log的磁盘已满，导致无法写。
重新清理了archive.log 的过期文件。腾出了空间。
重新启动数据库。 重启启动JBOSS，重启登陆，一切顺利。