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

Question

I m trying to connect to Oracle 10 2 0 from NetBeans  using the following connection string   jdbc oracle thin  localhost 1521 XE   The weirdest part is that everything worked fine  until the one of the reboots  I started getting this TNS-12505 errors all the time  look at the final entries in my listener log   TNSLSNR for 32-bit Windows  Version 10 2 0 1 0 - Production on 14-APR-2011 13 46 48  Copyright  c  1991  2005  Oracle   All rights reserved   System parameter file is D  oraclexe app oracle product 10 2 0 server network admin listener ora Log messages written to D  oraclexe app oracle product 10 2 0 server network log listener log Trace information written to D  oraclexe app oracle product 10 2 0 server network trace listener trc Trace level is currently 0  Started with pid 3460 Listening on   DESCRIPTION  ADDRESS  PROTOCOL ipc  PIPENAME     pipe EXTPROC FOR XEipc    Listening on   DESCRIPTION  ADDRESS  PROTOCOL tcp  HOST Brodyaga-PC  PORT 1521    Listener completed notification to CRS on start  TIMESTAMP   CONNECT DATA    PROTOCOL INFO    EVENT    SID    RETURN CODE 14-APR-2011 13 48 54    CONNECT DATA  SID XE  CID  PROGRAM JDBC Thin Client  HOST   jdbc    USER Brodyaga       ADDRESS  PROTOCOL tcp  HOST 127 0 0 1  PORT 58458     establish   XE   12505 TNS-12505  TNS listener does not currently know of SID given in connect descriptor 14-APR-2011 13 49 00    CONNECT DATA  SID XE  CID  PROGRAM JDBC Thin Client  HOST   jdbc    USER Brodyaga       ADDRESS  PROTOCOL tcp  HOST 127 0 0 1  PORT 58481     establish   XE   12505 TNS-12505  TNS listener does not currently know of SID given in connect descriptor 14-APR-2011 13 49 02    CONNECT DATA  SID XE  CID  PROGRAM JDBC Thin Client  HOST   jdbc    USER Brodyaga       ADDRESS  PROTOCOL tcp  HOST 127 0 0 1  PORT 58487     establish   XE   12505 TNS-12505  TNS listener does not currently know of SID given in connect descriptor 14-APR-2011 13 50 23    CONNECT DATA  CID  PROGRAM   HOST   USER Brodyaga   COMMAND services  ARGUMENTS 64  SERVICE LISTENER  VERSION 169869568     services   0   The first three entries are my attempts to connect from NetBeans   The fourth  the connection via SQL Plus  worked just fine   Here are the contents of my listener ora   SID LIST LISTENER      SID LIST        SID DESC          SID NAME   PLSExtProc         ORACLE HOME   D  oraclexe app oracle product 10 2 0 server         PROGRAM   extproc             SID DESC          SID NAME   CLRExtProc         ORACLE HOME   D  oraclexe app oracle product 10 2 0 server         PROGRAM   extproc             LISTENER      DESCRIPTION LIST        DESCRIPTION          ADDRESS    PROTOCOL   IPC  KEY   EXTPROC FOR XE          ADDRESS    PROTOCOL   TCP  HOST   Brodyaga-PC  PORT   1521              DEFAULT SERVICE LISTENER    XE    And tnsnames ora   XE      DESCRIPTION        ADDRESS    PROTOCOL   TCP  HOST   Brodyaga-PC  PORT   1521        CONNECT DATA          SERVER   DEDICATED         SERVICE NAME   XE             EXTPROC CONNECTION DATA      DESCRIPTION        ADDRESS LIST          ADDRESS    PROTOCOL   IPC  KEY   EXTPROC FOR XE              CONNECT DATA          SID   PLSExtProc         PRESENTATION   RO             ORACLR CONNECTION DATA       DESCRIPTION         ADDRESS LIST           ADDRESS    PROTOCOL   IPC  KEY   EXTPROC FOR XE                CONNECT DATA           SID   CLRExtProc          PRESENTATION   RO                 And output from   lsnrctl services  C  Users Brodyaga gt lsnrctl services  LSNRCTL for 32-bit Windows  Version 10 2 0 1 0 - Production on 14-APR-2011 13 59  45  Copyright  c  1991  2005  Oracle   All rights reserved   Connecting to  DESCRIPTION  ADDRESS  PROTOCOL IPC  KEY EXTPROC FOR XE    Services Summary    Service  CLRExtProc  has 1 instance s     Instance  CLRExtProc   status UNKNOWN  has 1 handler s  for this service        Handler s          DEDICATED  established 0 refused 0          LOCAL SERVER Service  PLSExtProc  has 1 instance s     Instance  PLSExtProc   status UNKNOWN  has 1 handler s  for this service        Handler s          DEDICATED  established 0 refused 0          LOCAL SERVER The command completed successfully   Both Oracle services are started and SQL Plus connects fine    Is there some workaround for this error

User · Answer

this worked for me - I did all of the above then changed   jdbc databaseurl jdbc oracle thin  localhost 1521 xe   to   jdbc databaseurl jdbc oracle thin  localhost 1521 xe

User · Answer

In my case i just went through following steps in windows 10     goto control panel click administrative click services find OracelServeceXE  OracleXEClrAgeng  OracleXETNSListener Right click and press Start Restart  After Completing Process  Check it will work or it will work     Done All the Best

User · Answer

Just for another possibility to check  I came up with exactly the same problem with an incorrect port number specified in connect URL  I created a new oracle11g instance and forgot to kill the former one occupying the same port 1521  so the new instance automatically started on port 1522  Editing port number solved my problem

User · Answer

As mentioned by removing the colon   and replacing with slash   before the sid worked for me   I have had this issue before  too

User · Answer

Go to Task Manager and check below services are running or not  if not start the services    OracleXETNSListener  OracleXEClrAgent  OracleServiceXE

User · Answer

Step 1     Check the DB listener status     lsnrctl status   Notice that the listener you want  in our case    orcl     is not showing   Step 2     Login via sqlplus     sqlplus sys oracle as sysdba   Sqlplus gave us this error message      Writing audit records to Windows Event Log failed   Step 3     Go into the Windows Event Viewer  eventvwr exe   Under    Windows Logs     right click on Application and select    Clear Log     Do the same for System   It may also be wise to right click on Application and select Properties  Then  under    Log Size    select the following option under    When maximum log size is reached        Overwrite events as needed     This should prevent the log from maxing out and causing the DB not to start   In Windows Vista and higher  you can execute the following command to clear the Application log      wevtutil cl Application   Step 4     Login via sqlplus     sqlplus sys oracle as sysdba   You should now be able to login with no error messages   Step 5 - Check the DB listener status     lsnrctl status   You should now see your listener running   Step 6     Start UCM  UCM should now start up   For a more in-depth answer to this question you can read my full blog post

User · Answer

Your database  that apparently has the ORACLE SID XE  is not defined in the listener ora  That is no problem  since when the database normally opens  it will register itself to the default listener  being the one on port 1521 so that is ok    is the database open  what is the start order of listener database  is the error persistent    If the database starts before the listener  the database has no listener to register to  It will do so every few minutes so after a while  I expect the error will go away because of the registration has taken place  You can issue alter system register  to speed this  If the database is in restricted mode  the connections using a service will fail  You are using ORACLE SID so that is not your problem   Also check the names in use  Is localhost resolving to the same address as Brodyaga-PC  In the jdbc string you use localhost and the listener listens om Brodyaga-PC  Is localhost 127 0 0 1

User · Answer

Starting OracleServiceHari where  HARI  is the SID  worked for me   Others facing same problem may check status of the service

User · Answer

I m running oracle xpress edition 11 2 on windows 8 and I had the same error when trying to connect to DB using sqldeveloper   I ve edited listener ora as per Brandt answer above and even restarted my machine the issue wasn t fixed   I ve done the following  go to control panel -  administrative tools -  services you will find a service called  OracleServiceXE  not running   I started it and tried to connect again  issue resolved

User · Answer

You need to add the SID entry for XE in order to register the instance with the listener    After installation of Oracle XE  everything looks good  but when you issue   C   gt sqlplus   as sysdba SQL gt shutdown immediate SQL gt startup  TNS-12505  TNS listener does not currently know of SID given in connect descriptor   the instance will not register with the listener    So please edit your listener ora like this     SID LIST LISTENER      SID LIST         SID DESC           SID NAME   XE          ORACLE HOME   C  oraclexe app oracle product 10 2 0 server               SID DESC            SID NAME   PLSExtProc           ORACLE HOME   D  oraclexe app oracle product 10 2 0 server           PROGRAM   extproc               SID DESC           SID NAME   CLRExtProc          ORACLE HOME   D  oraclexe app oracle product 10 2 0 server          PROGRAM   extproc               This issue came up when I installed Oracle XE on Windows 7  I did not face this problem on Windows XP  In general  this entry should not be necessary  because the instance should register with the listener automatically  Running Oracle XE on Linux  Fedora   there is no need to add XE to the sid-list

User · Answer

Check - LSNRCTL  stat I got result like -   Connecting to  DESCRIPTION  ADDRESS  PROTOCOL IPC  KEY EXTPROC1522    STATUS of the LISTENER ------------------------ Alias                     LISTENER Version                   TNSLSNR for 32-bit Windows  Version 11 2 0 1 0 - Production  Start Date                17-APR-2016 10 12 38  Uptime                    0 days 10 hr  6 min  16 sec  Trace Level               off  Security                  ON  Local OS Authentication  SNMP                      OFF Listener Parameter File                          C  product 11 2 0 dbhome 1 network admin listener ora Listener Log File        c  app admin diag tnslsnr admin-PC listener alert log xml Listening Endpoints Summary         DESCRIPTION  ADDRESS  PROTOCOL ipc  PIPENAME     pipe EXTPROC1522ipc       DESCRIPTION  ADDRESS  PROTOCOL tcp  HOST 127 0 0 1  PORT 1522    Services Summary    Service  CLRExtProc  has 1 instance s     Instance   CLRExtProc   status UNKNOWN  has 1 handler s  for this service    Service  orcl  has 1 instance s     Instance  orcl   status READY  has 1 handler s  for this service     Service  orclXDB  has 1 instance s      Instance  orcl   status READY  has 1 handler s  for this service    The command completed successfully    From above details  - My port no is - 1522 and i am able to create connection using  orcl  instance - so i used port as 1522 and instance as  orcl  -- Now URL is -   DriverManager getConnection  jdbc oracle thin  localhost 1522 orcl    SYS as SYSDBA   password      It worked for me So please check LSNRCTL  stat in command prompt and configure your connection url accordingly  Hope it will help Someone

User · Answer

I ve just faced the same problem just after installed Oracle XE 11 2  After reading and consulting a DBA friend  I ran the following command   C   gt tnsping xe  TNS Ping Utility for 64-bit Windows  Version 11 2 0 2 0 - Production on 11-ENE-2017 14 27 44  Copyright  c  1997  2014  Oracle   All rights reserved   Used parameter files  C  oraclexe app oracle product 11 2 0 server network admin sqlnet ora   Used TNSNAMES adapter to resolve the alias Attempting to contact  DESCRIPTION    ADDRESS    PROTOCOL   TCP  HOST   myLaptop  PORT   1521    CONNECT DATA    SERVER   DEDICATED   SERVICE NAME   XE      OK  30 msec   C   gt    As you can see  it takes long time to resolve  so I added an entry to hosts file as follows   127 0 0 1       localhost   Once done  ran again the same command   C   gt tnsping xe  TNS Ping Utility for 64-bit Windows  Version 11 2 0 2 0 - Production on 11-ENE-2 017 14 40 29  Copyright  c  1997  2014  Oracle   All rights reserved   Used parameter files  C  oraclexe app oracle product 11 2 0 server network admin sqlnet ora   Used TNSNAMES adapter to resolve the alias Attempting to contact  DESCRIPTION    ADDRESS    PROTOCOL   TCP  HOST   myLaptop  PORT   1521    CONNECT DATA    SERVER   DEDICATED   SER VICE NAME   XE    OK  30 msec   C   gt    As time response radically decreases  I tried my connection on sqldeveloper successfully

User · Answer

This worked for me like a magic   I logged into database and registered the listener   alter system set local listener          alter system register

User · Answer

in Windows in the search option Go to administrative tools component services OracleServiceXE start this service

User · Answer

I had the same issue on Windows 7  The cause was  that I had been connected to VPN using Cisco AnyConnect Secure Mobility Client

User · Answer

I ran into this problem after a firewall change to restrict access between our internal network and the database server reporting the error located in the DMZ   Communication was working fine until the change  and system and database restarts were of no help   In my case both Oracle XE11gR2 installations are on Windows   After  day of struggle I found http   edstevensdba wordpress com 2011 07 30 exploring-the-local listener-parameter  and solved the problem with   alter system set local listener   ADDRESS  PROTOCOL tcp  HOST  my server s ip   PORT 1521    scope both  alter system register    it may be that this worked simply because of the  alter system register  as suggested by ik zelf   I did have the IP already set in relevant places in listener ora and tnsnames ora

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After a change of ip in our oracle virtual machine  the listener never  worked again  Finally these command solved the problem  where 192 168 10 200 is the new ip       oracle oracle admin   sqlplus   as sysdba      SQL Plus  Release 11 2 0 1 0 Production on Tue May 10 12 57 37 2016      Copyright  c  1982  2009  Oracle   All rights reserved       Connected to    Oracle Database 11g Enterprise Edition Release 11 2 0 1 0 - 64bit Production   With the Partitioning  OLAP  Data Mining and Real Application Testing options      SQL  alter system set local listener   ADDRESS  PROTOCOL tcp  HOST 192 168 10 200  PORT 1521    scope both       System altered       SQL  alter system register       System altered       SQL  exit

[oracle] TNS-12505: TNS:listener does not currently know of SID given in connect descriptor

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