Failed to allocate port(s) in the specified range(s) for the following process(es):

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/app/oracle/product/10.2.0/db_1/cfgtoollogs/emca/orcl/emca_2008-03-12_03-42-45-PM.log for more details.
Could not complete the configuration. Refer to the log file at /u01/app/oracle/product/10.2.0/db_1/cfgtoollogs/emca/orcl/emca_2008-03-12_03-42-45-PM.log for more details.
I just added ip-address machinename in /etc/hosts file