I was on vacation last week and when I returned, I could no longer connect to my local Oracle instance. My C# apps and PL/SQL developer both reported a ORA-12541 TNS: no listener error.
I hadn’t changed anything before I left and I certainly hadn’t changed anything as soon as I got back so I was a little perplexed. Fortunately, there was a pretty easy solution which I extracted from The Oracle FAQ.
- Check your listeners status by going to the command line and entering the Listener Control Program using command LSNRCTL. Once in the program enter the command: STATUS
The tool suggests you also start and stop the listener but that had no effect for me. My listener just didn’t want to work.
- Recreate your listener. Again, go to a command prompt but this time open up the Network Configuration Assistant using the command: netca
- Inside this tool you first need to delete your listener. Mine was actually called “listener” and I just accepted all of the defaults when deleting it. Once it is deleted, recreate it, again I used all of the defaults.
- After it was created I went back to the Listener Control Program (LSNRCTL) and ran the STATUS commaned. This time it looked pretty good and, sure enough, my apps and PL/SQL Developer were able to connect to the database.
thanks for no listener issue resolution steps.It worked for me.