问题
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
回答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.
回答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.
回答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.
回答4:
I solved just by: given correct host and port so:
- Open oracle net manager
- Local
- Listener
in Listener on address 2 then copy host to Oracle Developer
finally connect to oracle
回答5:
Curiously, I was able to solve the same issue by doing the exact opposite move to svc's ! I had to :
1) replace the FQDN hostname in my tnsnames.ora / listener.ora files with localhost, and restart the listener service, and
2) two, I had to use "SYS as SYSDBA" as the username in the SQL Developer input textbox
to finally be able to have SQL Developer hook to my local instance.
回答6:
only start listner then u can connect with database. command run on editor:
lsnrctl start
its work fine.
回答7:
You can locate a file named listener.ora under the installation folder oraclexe\app\oracle\product\11.2.0\server\network\ADMIN
It contains the following entries
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
(PROGRAM = extproc)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = Codemaker-PC)(PORT = 1521))
)
)
DEFAULT_SERVICE_LISTENER = (XE)
You should verify the HOST (Here it is Codemaker-PC) should be the computer name. If it's not correct the change it as computer name.
then try the following command on the command prompt run as administrator,
lsnrctl start
回答8:
I faced the same problem. I had to turn off my firewall, then it worked.
You could also open the port: http://windows.microsoft.com/en-in/windows/open-port-windows-firewall#1TC=windows-7
回答9:
This worked for me. may help some one. Turn off firewall. on RHEL 7
systemctl stop firewalld
回答10:
For me, the HOST was set differently in tnsnames.ora and listener.ora. One was set to the full name of the computer and the other was set to IP address. I synchronized them to the full name of the computer and it worked. Don't forget to restart the oracle services.
I still don't understand exactly why this caused problem because I think IP address and computer name are ultimately same in my understanding.
来源：https://stackoverflow.com/questions/24127839/oracle-sql-developer-failure-test-failed-the-network-adapter-could-not-estab