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The Network Adapter could not establish connection

1008319May 10 2013 — edited May 12 2013
Status : Failure -Test failed: IO Error: The Network Adapter could not establish the connection

I am trying to use Oracle SQL Developer in MacBook Pro OS X 10.8.3 (12D78).

Connection Name: hr
username: hr
password: hr

HostName: localhost
port: 1521
SID: orcl

I do not know much about it, but my port configuration looks good. I tried changing connection name, username and password but didn't work. And I tried in Windows 8 too, same problem.

If you could give the detail way to get it fixed, it would wonderful.

Any help would be really appreciated.
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Locked on Jun 9 2013
Added on May 10 2013
#11g, #sql-developer
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