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

Question

I have installed Oracle 11g Express Edition Release 2 in my windows 7 64 bit OS and tried to execute JDBC program  then I got the following error   java sql SQLException  Listener refused the connection with the following error  ORA-12505  TNS listener does not currently know of SID given in connect descriptor     at oracle jdbc driver T4CConnection logon T4CConnection java 412      at oracle jdbc driver PhysicalConnection  lt init gt  PhysicalConnection java 531      at oracle jdbc driver T4CConnection  lt init gt  T4CConnection java 221      at oracle jdbc driver T4CDriverExtension getConnection T4CDriverExtension java 32      at oracle jdbc driver OracleDriver connect OracleDriver java 503      at java sql DriverManager getConnection Unknown Source      at java sql DriverManager getConnection Unknown Source      at com jlcindia jdbc JDBCUtil geOracleConnection JDBCUtil java 28      at Lab3O main Lab3O java 15  Caused by  oracle net ns NetException  Listener refused the connection with the following error  ORA-12505  TNS listener does not currently know of SID given in connect descriptor     at oracle net ns NSProtocol connect NSProtocol java 385      at oracle jdbc driver T4CConnection connect T4CConnection java 1042      at oracle jdbc driver T4CConnection logon T4CConnection java 301          8 more

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Please check both OracleServiceXE and OracleXETNSListener having the status started when you navigate through start- gt run- gt services msc   For my case only OracleXETNSListener was started but OracleServiceXE was not started  when I started by right clicking - gt  start and checked the connection its working for me

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Faced similar error  any of the above solutions didn t help  There was a problem in the listner ora file  By mistake I had added SID out of the SID LIST see below section between the stars       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                          SID DESC               SID NAME   XE              ORACLE HOME   C  oraclexe app oracle product 11 2 0 server                  LISTENER          DESCRIPTION LIST            DESCRIPTION              ADDRESS    PROTOCOL   IPC  KEY   EXTPROC1              ADDRESS    PROTOCOL   TCP  HOST   127 0 0 1  PORT   1521                           DEFAULT SERVICE LISTENER    XE    Corrected this error as below   SID LIST LISTENER      SID LIST        SID DESC           SID NAME   XE          ORACLE HOME   C  oraclexe app oracle product 11 2 0 server              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   127 0 0 1  PORT   1521               DEFAULT SERVICE LISTENER    XE    Stopped and the database   Stopped the listeners OracleServiceXE and OracleXETNSListener manually as it did not stop automatically by going to Control Panel All Control Panel Items Administrative Tools Services  Restarted the database and it worked like a charm

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Apart from running services OracleServiceXE OracleXETNSListener  on there is a chance your Anti-virus software firewall may still block them  Just make sure they are not blocked

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In my case not was working out  finally i restarted my oracle and TNS listener and everything worked  Was struggling for 2 days

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I just fixed it by restarting   starting oracleService in services

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My issue is resolved when I use the below code   Class forName  oracle jdbc driver OracleDriver    Connection conn DriverManager getConnection  jdbc oracle thin  IPAddress 1521 servicename   userName   Password

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Connection con DriverManager getConnection  jdbc oracle thin  localhost 1521 xe   scott   tiger     Error I got   java sql SQLException  Listener refused the connection with the following error  ORA-12505  TNS listener does not currently know of SID given in connect descriptor The Connection descriptor used by the client was  localhost 1521 xe  How I solved it   Connection con DriverManager getConnection  jdbc oracle thin localhost 1521 xe   scott   tiger      Remove     Don t know why  but its working now

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If you use Oracle Express Edition  you should have this url     jdbc oracle thin  localhost 1521 xe or jdbc oracle thin  localhost 1521 XE   I had similar problem with liquibase config plugin in pom xml  And I changed my configuration     lt configuration gt      lt driver gt oracle jdbc OracleDriver lt  driver gt      lt url gt jdbc oracle thin  localhost 1521 xe lt  url gt      lt defaultSchemaName gt  lt  defaultSchemaName gt      lt username gt      lt  username gt      lt password gt      lt  password gt   lt  configuration gt

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i initially came here with the same problem  I had jus installed Oracle 12c on Windows 8  64-bit  but i have since resolved it by  TNSPING xe  on the command line    If the connection isn t established or name not found try the database name in my case it was  orcl       TNSPING orcl  again and if it pings successfully then u need to change the SID to  orcl  in this case  or whatever database name u used

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Check by doing tnsping and instance name in host machine  It will give u the tns decription and all most of the time host name is different which is not matching   I resolve my issue likewise  In Unix machine   tnsping    Enter   It gives me full tns description where I found that host name is different

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I had similar problem in SQL Workbench   URL   jdbc oracle thin  111 111 111 111 1111 xe  doesn t work   URL   jdbc oracle thin  111 111 111 111 1111 asdb  works   This help me in my concrete situation  I afraid  that could exists many other reasons with different solutions

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I encounter this problem because I did kill task to  quot Oracle quot  task in the Task Manager  To fix it you need to open the cmd - gt  type  services msc - gt  the window with all services will open - gt  find service  quot OracleServiceXE quot  - gt  right click  start

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I fixed this issue by changing  SID  to  SERVICE NAME  in my TNSNAMES ora file   Please see if your DB asks for SID or SERVICE NAME   Cheers

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There are a few things that can cause this problem  but before you get started with JDBC  you need to be sure that you can connect to the database using SQL Plus   If you re not familiar with SQL Plus  it s a command-line tool for connecting to Oracle databases that has been a standard part of Oracle for a long time and it is included with Oracle XE   When connecting to an Oracle database using JDBC  you don t connect to the database directly   Instead  you connect to a TNS listener  which then connects you to the database   The error ORA-12505 means that the listener was up and you could connect to it  but it couldn t connect you to the database because it doesn t know that that database is up   There are two reasons for this    the database has not been started up  the database has not registered with the listener  e g  because the database was started before the listener    When the database starts  it registers itself with a listener if it is already running   If the listener isn t running  the database doesn t register itself  and if the listener starts  it doesn t go looking for databases that might register with it     ORA-12505 means that the listener knows about that database  but the listener hasn t received a notification from the database that the database is up    If you were trying to connect to the wrong database  using the wrong SID  you would get an ORA-12154 error  TNS  could not resolve the connect identifier specified     What Oracle services are running in the Services snap-in    Open this from Control Panel   Administrative Tools   Services  or just Start   Run   services msc    You need the services OracleServiceXE and OracleXETNSListener to be running   If the services have both been started  can you connect to the database in SQL Plus using any of the following at a command prompt    I m assuming you re running these on the machine you ve installed Oracle XE on    sqlplus system system-password XE  sqlplus system system-password  sqlplus   as sysdba   Replace system-password with the password you set for the SYS and SYSTEM users during the Oracle XE installation    The first of these three connect via the TNS listener  but the second two connect directly to the database without going via the listener  and only work if you re on the same machine as the database   If the first one fails but the other two succeed  then JDBC connections will also fail   If so  connect to the database using either of the other two and run ALTER SYSTEM REGISTER   Then exit from SQL Plus and try the first form again   If the third one fails but the second one works  add your user account to the ora dba group   Do this in Control Panel   Computer Management   Local Users and Groups   Once you can get connections of the form  sqlplus system system-password XE  to work  you ought to be able to connect to Oracle XE via JDBC    Incidentally  you haven t shown us the JDBC code you re using to connect to the database  but I would suspect that it is quite probably correct  there would be various other errors if parts of the connection string were wrong

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Had a similar issue  The issue started occurring suddenly - we are having load balanced database connection URL  but in jdbc connections I was pointing to a single db directly   Changed to load balanced db url and it worked

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I was just creating the database link incorrectly    Simple fix for me was to simply change  SID  to SERVICE NAME  CREATE DATABASE LINK my db link CONNECT TO myUser IDENTIFIED BY myPassword USING         DESCRIPTION                ADDRESS           PROTOCOL TCP           HOST host-name-heren           PORT 1521             CONNECT DATA  SID theNameOfTheDatabase         Changing   SID theNameOfTheDatabase   to   SERVICE NAME theNameOfTheDatabase    resolved my issue

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I fixed this issue by correcting my jdbc string     For example  the correct jdbc string should be     jdbc oracle thin  myserver 1521 XE   But the jdbs string I was using is      jdbc oracle thin  myserver 1521 XE    Note  between 1521 and XE should be a     This bad jdbc string give me a ORA-12505 error too

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I found some reasons for this exception they are  1 The name of the database XE by default so the url will be jdbc oracle thin  localhost 1521 XE    2 Make sure that OracleServiceXE OracleXETNSListener is running it will be in Control Panel All Control Panel Items Administrative Tools Services

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When your getting this error  ORA-12505  TNS listener does not currently know of SID given in connect descriptor   Solution  Open Services  and start OracleServiceXE  after that try to connect

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I have faced the same issue and solved by restart the OracleServiceXE service  Goto Services msc and then verify the  OracleServiceXE  service is UP and running

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I solved this issue by correcting my JDBC code   the correct JDBC string should be     conection   DriverManager getConnection   jdbc oracle thin  localhost 1521 xe   system   ishantyagi      But the JDBC string I was using was      conection   DriverManager getConnection   jdbc oracle thin  localhost 1521 orcl   system   ishantyagi      So  the mistake of specifying orcl instead of xe showed this error as the SID name was wrong

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I had the same problem so to resolve this problem I first reconfigure my listener using netca after that I deleted my old database which was ORCL by using dbca and then i created the new database again using dbca

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I got this error ORA-12505  TNS listener does not currently know of SID given in connect descriptor when I tried to connect to oracle DB using SQL developer   The JDBC string used was jdbc oracle thin  myserver 1521 XE  obviously the correct one and the two mandatory oracle services OracleServiceXE  OracleXETNSListener were up and running   The way I solved this issue  In Windows 10    1  Open run command   2  Type services msc   3  Find services with name OracleServiceXE and OracleXETNSListener in the list   4  Restart OracleServiceXE service first  After completing the restart try restarting OracleXETNSListener service

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One possibility that I haven t seen widely discussed is that there may be a problem resolving the hostname on the host machine itself   If there is no entry for   hostname  in  etc hosts  the Oracle listener gets confused and wont come up   That turned out to be my problem  and adding the hostname and ip address in  etc hosts resolved the problem

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I too faced the same issue  I had installed Oracle Express edition 10g in Windows XP OS using VMware and it was working fine  Since it was very awkward typing SQL queries in the SQL utility provided by 10g and since I was used to working with SQL developer  I installed 32 bit SQL developer in XP and tried connecting to my DB SID  XE   But the connection failed with error-ORA-12505 TNS listener doesn t currently know of SID given in connect descriptor  I was at sea as to how this problem occurred since it was working fine with the SQL utility and I had also created few Informatica mappings using the same  I did browse a lot on this stuff hither thither and applied the suggestions offered to me after pinging the status of  lsnrctl  on public forums but to no avail  However  this morning I tried creating a new connection again  and Voila  it worked with no issues  I am guessing after reading in few posts that sometimes listener listens before the DB connects or something pardon me for my crude reference as I am a newbie here  but I suggest to just restart the machine and check again

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Oracle   Thin-style Service Name Syntax  Thin-style service names are supported only by the JDBC Thin driver  The syntax is      host name port number service name  http   docs oracle com cd B28359 01 java 111 b31224 urls htm BEIDHCBA

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If you have a working connection in Oracle SQL Developer  use the information on the connection menu to build your url  as described in the following image     In the above example  the url would be    jdbc oracle thin  ORADEV myserver com 1521 myservice  Note that if your are using a SID  then there is a  colon       instead of a slash       after the host name

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My oracle stopped working and I was getting this error  I restarted my machine and also tried above solutions  Ultimately  I opened component services and restarted the oracle services and it all started working  Hope this helps someone

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I too got the same error but when tried all the three of them failed   If the above three fails Try LSNRCTL status if you find the service  XE in my case missing try this  sqlplus  nolog conn  system alter system register    exit   lsnrctl status     Now you can see the service Even if don t see try this one out    sqlplus  nolog   conn system   alter system set local listener     ADDRESS  PROTOCOL TCP  HOST localhost  PORT 1521    scope   both    alter system register    exit   lsnrctl status   This should probably work

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

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