主要描述了在安装ＥＭ时，始终报下面的错误的解决办法：

Enterprise manager configuration failed due to the following error -
Failed to allocate port(s) int the specified range for the following process(es):
JMS [5540-5559], RMI [5520-5539], Database Control [5500-5519], EM agent [1830-1849]

今天在ＨＰＵＸ　１１．３１上安装ＯＲＡＣＬＥ　１０Ｇ　１０．２．０．３时，数据库都配置好了，但ＥＭ报错，通过安装日志文件查看，发现以下错误：

SEVERE: Failed to allocate port(s) in the specified range(s) for the following process(es): JMS [5540-5559],RMI [5520-5539],Database Control [5500-5519],EM Agent [3938] | [1830-1849]
Refer to the log file at /U01/oracle/product/10.2.0/db_1/cfgtoollogs/emca/si2000/emca_2007-12-22_04-36-47-PM.log for more details.
Dec 22, 2007 4:37:17 PM oracle.sysman.emcp.EMConfig perform
CONFIG: Stack Trace:
oracle.sysman.emcp.exception.EMConfigException: Failed to allocate port(s) in the specified range(s) for the following process(es): JMS [5540-5559],RMI [5520-5539],Database Control [5500-5519],EM Agent [3938] | [1830-1849]
at oracle.sysman.emcp.EMDBPreConfig.checkPorts(EMDBPreConfig.java:2255)
at oracle.sysman.emcp.EMDBPreConfig.performConfiguration(EMDBPreConfig.java:678)
at oracle.sysman.emcp.EMDBPreConfig.invoke(EMDBPreConfig.java:241)
at oracle.sysman.emcp.EMDBPreConfig.invoke(EMDBPreConfig.java:168)
at oracle.sysman.emcp.EMConfig.perform(EMConfig.java:141)
at oracle.sysman.emcp.EMConfigAssistant.invokeEMCA(EMConfigAssistant.java:485)
at oracle.sysman.emcp.EMConfigAssistant.performConfiguration(EMConfigAssistant.java:1141)
at oracle.sysman.emcp.EMConfigAssistant.statusMain(EMConfigAssistant.java:469)
at oracle.sysman.emcp.EMConfigAssistant.main(EMConfigAssistant.java:418)

经过网上查询，知道是网络端口重复了，使用以下方法解决：

emca -config dbcontrol db -DBCONTROL_HTTP_PORT 5508 -AGENT_PORT 3940 -RMI_PORT 5524 -JMS_PORT 5545

再停用一次ＥＭ，再启动ＥＭ，就好了．

emctl stop dbconsole

emctl start dbconsole