Skip to main content

ORA-12505, TNS:listener does not currently know of SID given in connect descriptor


How to solve ORA-12505, Listener does not currently know of SID  


This is very common error and really it will suck your blood if you are not right path. I will try to explain you about this error.

As you can see this error is showing itself that listener is up and running but not serving  the SID that it is meant for. And yes 1st you need to check where you are facing this error. Is it on client side or on server side.

So what is the SID this listener looking for?

SID is name for your database or you can say service identifier, That is help to to identify the the service like we use PROD for production UAT for testing server. SID of Database should be identical to avoid the confusion. It's length is 8 character only that means you can not extend it more then 8 character.

Now how listener works ?

As we all know its like a car, That drop us from airport to hotel, hahah sorry I am not good in examples. So let me explain technically, whenever you try to make connection from a client machine to the DB server rather than connecting directly oracle have this utility called listener. As you can understand by name it self, yes yes it is going to listen your reqst and then pass that to DB. wow great right.?


Now what if you are taking a taxi to some hotel and that hotel does not exist? Same happens with this error. Taxi driver don't know where you are going so it will through you the error :-

"ORA-12505, TNS:Listener does not currently know of SID given in connect descriptor"


How to solve this "ORA-12505, TNS:listener does not currently" ?



It's very easy. Tell the taxi driver name of hotel that really exist. Fare enough right?

OK Tips for troubleshooting.

We all know that listner.ora and tnsnames.ora  are two files that are involved in this case. and location of these files are $ORACLE_HOME\network\admin

Now check your tnsnames.ora that SID is mentioned is correct or not. Like for my TEST DB is should be like below :-
TEST_TNS = (DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=*******)(PORT=0000)))(CONNECT_DATA=(SERVICE_NAME=TEST)(INSTANCE_NAME=TEST)))


You can change the format also but i like this way. and yes PORT can't be 0000. ;)

Now you know SID service name TEST is listening at 0000 port number.

If I have set accurate entries than you shouldn't face any issue. So Please check these entries. Also check listner.ora file too. If there is mismatch in entries. Than you going to face same issue

That will solve your problem.

Keep sharing. Keep smile ;)

Popular posts from this blog

ORA-02051 Another Session Or Branch In Same Transaction Failed

ORA-02051 Another Session Or Branch In Same Transaction Failed (Doc ID 2253226.1)          SYMPTOMS for ORA-02051 Another Session Or Branch In Same Transaction Failed. Database performance is slow and caused   the transactions ORA-02051 another session or branch in same transaction failed or finalized CAUSE for ORA-02051 Another Session Or Branch In Same Transaction Failed. Session transactions branches caused the issue Excessive Waits On The Event "Global transaction acquire instance locks" SOLUTION Please use below sql and identified underscore parameter values for ORA-02051 Another Session Or Branch In Same Transaction Failed : SQL> select a.ksppinm "Parameter", b.ksppstvl "Session Value",c.ksppstvl "Instance Value"  FROM x$ksppi a,x$ksppcv b, x$ksppsv c  WHERE a.indx = b.indx AND a.indx = c.indx AND a.ksppinm LIKE '/_%' escape '/'  AND (a.ksppinm like '%clusterwide_global%' or a.ksppinm like '%disable_autotune_...
more »

Video Conferencing Project in Java Source Code

Video Conferencing Project in Java Source Code     ################################################################################# FEATURE ################################################################################# 1.Multi Chat(Used Threadpole) 2.P2P Chat 3.P2P Audio Chat 4.P2P Video Chat 5.Complete Automated 6.H.263 compression Video 7.raw audio PREREQUISITE: 1. JUST INSTALL jmf-2.1.1 e @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ *****/  just need to copy the client side code and run it to a pc   not need any manual IP ***/  How to run : Just run server side code in a PC and then Run Client side code to different  PC.Then the work is done. Server Side Code: ClientListener.java Clients.java Main.java MessageListener.java ServerConstant.java ServerManager.java ServerMonitor.java ServerStatusListener.java   ClientListener.java /*  * To change this template, choose Tools | Templates  * and open the tem...
more »

DBA_SCHEDULER_JOB_RUN_DETAILS and PURGE_LOG

How to purge DBA_SCHEDULER_JOB_RUN_DETAILS? Manually deleting from DBA_SCHEDULER_JOB_RUN_DETAILS is not recommended by oracle.DBA_SCHEDULER_JOB_RUN_DETAILS is a view that is using two master tables (scheduler$_job_run_details and scheduler$_event_log) and display the information about jobs history. As there is one procedure named PURGE_LOG and Oracle have Scheduler for this procedure. It will purges all rows in the job log that are older than 30 days.This is the default behavior of this procedure. You can change this to any number of days you want by setting the attribute "SET_SCHEDULER_ATTRIBUTE". e.g. exec DBMS_SCHEDULER.SET_SCHEDULER_ATTRIBUTE('log_history','15'); It will purge all logs older than 15days and it will maintain the history of 15days. But If you want manually purge these logs, you can use below solution:- exec DBMS_SCHEDULER.PURGE_LOG(log_history => 15, which_log => 'JOB_LOG'); It will purge all entries from the jog log that are o...
more »

JAX-WS Hello World Example – RPC Style

JAX-WS Hello World Example – RPC Style AX-WS is bundled with JDK 1.6, which makes Java web service development easier to develop. This tutorial shows you how to do the following tasks: Create a SOAP-based RPC style web service endpoint by using JAX-WS. Create a Java web service client manually. Create a Java web service client via  wsimport  tool. Create a Ruby web service client. You will be surprise of how simple it is to develop a RPC style web service in JAX-WS. Note In general words, “ web service endpoint ” is a service which published outside for user to access; where “ web service client ” is the party who access the published service. JAX-WS Web Service End Point The following steps showing how to use JAX-WS to create a RPC style web service endpoint. 1. Create a Web Service Endpoint Interface File : HelloWorld.java package com.mkyong.ws ;   import javax.jws.WebMethod ; import javax.jws.WebService ; import javax.jws.soap.SOA...
more »

Oracle character AL32UTF8

The character set determines what languages can be represented in the database. Oracle recommends using Unicode (AL32UTF8) as the database character set. AL32UTF8 is Oracle's name for the UTF-8 encoding of the Unicode standard. The Unicode standard is the universal character set that supports most of the currently spoken languages of the world. The use of the Unicode standard is indispensable for any multilingual technology, including database processing. Changing the database character set is a time consuming and complex project. Therefore, it is very important to select the right character set at installation time. If the language is American English or a Western European language, then the default character set is WE8MSWIN1252. Each Microsoft Windows ANSI Code Page can store data from only one language or a limited group of languages, such as only Western European, or only Eastern European, or only Japanese. AL32UTF8 is a multibyte character set, database operations on character...
more »

ORA-02291: integrity constraint violated - parent key not found

“Error: ORA-02291: integrity constraint violated - parent key not found” Reason:    A Primary key does not have the same value as the foreign key. We will discuss it in detail later in this article. Action:   For  ORA-02291: integrity constraint violated - parent key not found  You may either delete the foreign key or the matching primary key can be added. In either way, you may try to get this error corrected. Let's understand more about ORA-02291: integrity constraint violated - parent key not found? The Oracle software brought us the strength by which multiple tables in the database can pass on information so efficiently. Not only this, there are numerous devices in this software which enables access to and sourcing data from multiple tables. You can easily execute complicated database issues without an unusual uncertainty by creating statements with the fantastic characteristic of this software. Realistically, if we talk about user or database no one is perf...
more »