Oracle SQL Developer: Failure - Test failed: The Network Adapter could not establish the connection?

Question

Problem

Please note that I changed details for security purposes. However, the problem remains intact.

I installed an Oracle 11g database on a server at location, say, herp-devDV.derp.edu. Now I have another Oracle 11g database on a server at location, say, derp-db.derp.edu.

I entered the connection name, username, password, hostname, and service name in Oracle SQL developer for both herp-devDV.derp.edu and derp-db.derp.edu. I can connect to schema in derp-db.derp.edu, but not herp-devDV.derp.edu. It gives me this message:

Failure - Test failed: The Network Adapter could not establish the connection

Details

I have the following information:

• Port 1521 is not open for either server when I telnet
• My listener is up and running for both.
• I can access derp-db.derp.edu on Oracle SQL Developer.
• Oracle client is on my local machine + Oracle SQL Developer
• I can remote desktop to both servers

What I have done

• Googled
• Stackoverflow
• Ran stop and start lnrctl commands
• On herp-devDB.derp.edu I ran lsnrctl status

I received the following output

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Production
Start Date                03-JUN-2014 13:37:22
Uptime                    6 days 0 hr. 53 min. 4 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   D:\oracle\product\11.2.0\dbhome_1\network\admin\listener.ora
Listener Log File         d:\oracle\diag\tnslsnr\HERP-DEVDB\listener\alert\log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=HERP-DEVDB.derp.edu)(PORT=1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
  Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "HERPDEVDBXDB" has 1 instance(s).
  Instance "herpdevdb", status READY, has 1 handler(s) for this service...
Service "herpdevdb" has 1 instance(s).
  Instance "herpdevdb", status READY, has 1 handler(s) for this service...
The command completed successfully

I then check out my listener.ora and find

  SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:\oracle\product\11.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = HERP-DEVDB.derp.edu)(PORT = 1521))
    )
  )

At this point, I confess I am scratching my head as I don't see anything sticking out and telling me why this should not be working.

The only clue is when I check derp-db.derp.edu and run the command lsnrctl status. Please see excerpt below:

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=DERP-DB.edu)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for 64-bit Windows: Version 11.2.0.3.0 - Production
Start Date                18-MAY-2014 02:19:01
Uptime                    22 days 12 hr. 23 min. 18 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
---etc----

So I am still scratching my head. Why would derp-db be connecting to the DERP-DB.edu but herp-devDB is connecting to EXTPROC1521? How do I fix this? The listener.ora and other files between these two servers are almost identical except for the name of the instances. Hmmm.

• EDIT1: I changed the listener.ora in herp. This didn't fix it.

• EDIT2: I cannot telnet into derp-db.derp.edu on port 1521. But I can still connect to it with SQL Developer? Wth?

• EDIT3 I cannot telnet into herp-devdb.derp.edu on port 1521 either.
• EDIT4 I cannot ping IP addresses of either server.

Anyway assistance would be greatly appreciated. Thanks

Regards, Geeky

Answer 1

I am answering this for the benefit of future community users. There were multiple issues. If you encounter this problem, I suggest you look for the following:

• Make sure your tnsnames.ora is complete and has the databases you wish to connect to
• Make sure you can tnsping the server you wish to connect to
• On the server, make sure it will be open on the port you desire with the specific application you are using.

Once I did these three things, I solved my problem.

Answer 2

I had a similar issue where I also continuously got the same error. I tried many things like changing the listener port number, turning off the firewall etc. Finally I was able to resolve the issue by changing listener.ora file. I changed the following line:

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

to

(ADDRESS = (PROTOCOL = TCP)(HOST = hostname)(PORT = 1521)) 

I also added an entry in the /etc/hosts file.

you can use Oracle net manager to change the above line in listener.ora file. See Oracle Net Services Administrator's Guide for more information on how to do it using net manager.

Also you can use the service name (database_name.domain_name) instead of SID while making the connnection.

I Hope it helps.

Answer 3

I just had same issue when I installed the oracle 11g and then creating the database.

I don't even know that the listener has to create manually. Hence, I open Net Configuration Assistant and manually create the listener.

And I can connect the database that I created locally through sql developer.