Oracle Listener 32-bit Windows Error 61 Unknown Error
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Oracle Windows TNS error: No Listener found Oracle Database Tips by Burleson Consulting May tns-12541: tns:no listener tns-12560: tns:protocol adapter error tns-00511: no listener 9, 2015 Question: I'm getting a TNS "no listener" error on my Windows Oracle database when trying to connect: LSNRCTL> status Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=
Tns-12560: Tns:protocol Adapter Error Tns-00530: Protocol Adapter Error
TNS:protocol adapter error TNS-00511: No listener 32-bit Windows Error: 61: Unknown error Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC0))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener 32-bit Windows Error: 2: No such file or directory How do I fix a "no listener" error? Answer: The TNS no listener errors indicate that the Windows listener service is not accepting connections or how to start tns listener in oracle 11g in windows the service is not running. The docs note the cause and action on the TNS No Listener errors, recommending to re-start the listener: Cause - The connect request could not be completed because no application is listening on the address specified, or the application is unable to service the connect request in a sufficiently timely manner. Action - Ensure that the supplied destination address matches one of the addresses used by the listener - compare the TNSNAMES.ORA entry with appropriate LISTENER.ORA file (or TNSNAV.ORA if the connection is to go by way of an Interchange. Start the listener on the remote machine. First, ensure that your listener service is running. C:\Documents and Settings\ME>lsnrctl stat Try to start the listener service using lsnrctl from DOS prompt. set ORACLE_HOME= cd %ORACLE_HOME%/bin lsnrctl start LISTENER If the listener service is not running, re-start the listener service using the Windows task manager or use the DOS command line utility to re-start the Windows service with the "net start" command: C:\Documents and Settings\ME>net start OracleOraDb10g_home1TNSListener
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starting up and when eventually did start listening on port 1521, it wasn't taking client connections! The odd part is that as far as I know nothing was changed, either software or network configuration, so why all this?! lsnctrl status was showing this error: C:\oracle\product\11.1.0\db_1\BIN>LSNRCTL.EXE status LSNRCTL for 32-bit Windows: Version 11.1.0.6.0 - Production on 27-JUL-2012 02:51:26 Copyright (c) 1991, 2007, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=server.domain.com)(PORT=1521))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener 32-bit Windows Error: 61: Unknown errorFocusing with Process Monitor (procmon) on TNSLSNR.exe showed that it was trying to write to the listener.log file. Right-click the file and choose Jump To… brought the file in Explorer, wow, the log file is 4 GB?! Stopping the listener service, removing the log file and restarting the listener service, services are back to normal now! C:\oracle\product\11.1.0\db_1\BIN>LSNRCTL.EXE status LSNRCTL for 32-bit Windows: Version 11.1.0.6.0 - Production on 27-JUL-2012 02:52:49 Copyright (c) 1991, 2007, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=server.domain.com)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for 32-bit Windows: Version 11.1.0.6.0 - Production Start Date 27-JUL-2012 02:52:27 Uptime 0 days 0 hr. 0 min. 22 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File C:\oracle\product\11.1.0\db_1\network\admin\listener.ora Listener Log File c:\oracle\diag\tnslsnr\SERVER\listener\alert\log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=SERVER.domain.com)(PORT=1521))) Services Summary... Service "INSTANCE1_XPT" has 1 instance(s). Instance "instance1", status READY, has 4 handler(s) for this service... Service "instance1" has 1 instance(s). Instance "instance1", status READY, has 4 handler(s) for this service... The command completed successfullyI guess now what's left is trying to figure out how to reduce the amount of logging, it appears that it logs every connection being made, which eventually fills up the log and create the problem.[…] 27-JUL-2012 03:17:21 * (CONNECT_DATA=(SID=instance1)(CID=(PROGRAM=JDBC Thin Client) HOST=__jdbc__)(USER=xxx))) * (ADDRESS=(PROTOCOL=tcp)(HOS