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When I am checking my servers I see that there is an error about listener process stopped. I logged in and checked the status of listenere. please see the below status;

LSNRCTL> status
TNS-12541: TNS:no listener    
  TNS-12560: TNS:protocol adapter error
    TNS-00511: No listener
      Solaris Error: 146: Connection refused
          TNS-12541: TNS:no listener
            TNS-12560: TNS:protocol adapter error
              TNS-00511: No listener
                Solaris Error: 2: No such file or directory>

I am thinking of just running the start command but my concern is why is this issue arised ?

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There is probably not enough logged at the default level to give you any real insight to root cause, so the best thing to do is restart the listener at a higher logging level. Enter

LSNRCTL> trace admin
LSNRCTL> save_config
LSNRCTL> start

Then if it crashes again, you'll know why. You can also set the variables trc_directory, trc_file and trc_level to customize this behavior.

Also your HOST= looks odd to me... Shouldn't that be the IP address of your host? What do you have in LISTENER.ORA?

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thanks for your comments Gaius; I checked the oracle instance on my both server. and see that the problemmatic server has nothing working belongs the oracle user. ps -ef returns nothing related with oracle user. in this case it seems oracle instance has stopped. – Olgun Kaya Apr 5 '11 at 5:55
would it be enough for me to use >startup commmand or do I need to use something else ? – Olgun Kaya Apr 5 '11 at 6:06
You mean to restart Oracle? Yes startup in SQL*Plus will do it. If once started you do show parameter background_dump_dest and look in that directory there will be an alert log file that should give you a clue as to why it stopped. – Gaius Apr 5 '11 at 10:17
I tried to startup the server but couldn't make it get working. I checked the alarm in bdomp directory and find the error below : Tue Apr 5 10:36:24 2011 ALTER DATABASE MOUNT Tue Apr 5 10:36:26 2011 ORA-00202: control file: '/ldap/oracle/oradata/mtv/control01.ctl' ORA-27086: unable to lock file - already in use SVR4 Error: 11: Resource temporarily unavailable Additional information: 8 Additional information: 22464.. I think an invisible process preventing me from starting the server. I will restart the server ( not oracle )and try to start the db instance again. wish me luck :) – Olgun Kaya Apr 5 '11 at 11:46
Is that a local disk or is it NFS? There may still be a lock hanging around on the storage device. – Gaius Apr 5 '11 at 12:15

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