Error Connecting To Database Ora-12537
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Ora-12537: Network Session: End Of File
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Diagnosing the ORA-12537: TNS: ora-12537 tns connection closed oracle 10g connection closed error Oracle Database Tips by Burleson Consulting Question: I'm trying to connect to Oracle and I get the ORA-12537: TNS: connection closedTns Connection Closed Solution
error. How do I fix an ORA-12537?Answer: The ORA-12537 is an informational error, and the "real" error is the secondary error message. ORA-12537 TNS:connection closed Cause: Normal "end of file" condition has been reached; partner has disconnected. Action: None needed; this is an information message. The ORA-12537 error sometimes relates configuration issues in the
Ora-12537 Tns Connection Closed Oracle 12c
sqlnet.ora, protocol.ora and listener.ora files. Verify that you service names match between your listener and remote client connect strings.This ORA-12537 can also happen if your firewall has disconnected idle connections.Also, the ORA-12537 sometimes happens in these cases: 1. You have a path name that is too long for the Oracle TNS client. See MOSC note:263489.1. Since the iORA-12537 ssue is caused by a large connection string there are several workarounds for the issue. 1. Install the exe in a shorter named directory. 2. Modify the TNS Names entry so that it is shorter. 3. Replace domain names with IP Addresses if that shortens and vice versa. 4. Remove any parameters from the entry that are not needed. 5. Patch the Database Listener to the most recent version. References 2. Bug:1566794: CONNECTIONS FAIL WITH ORA-12537 WHEN USE_SHARED_SOCKET IS SET IN 8.1.7. Resolution is to set USE_SHARED_SOCKET to FALSE. 3. Tnsping Net Service Name fails with TNS-12537: TNS:connection c
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Tns-12537 Tns-12560 Tns-00507
your message and try again. More discussions in General Database Discussions All PlacesDatabaseGeneral Database Discussions This discussion is tns-12537 ora-609 archived 6 Replies Latest reply on Nov 18, 2011 9:28 AM by ray_h ORA-12537: TNS:connection closed ray_h Nov 9, 2011 4:23 PM Oracle DB: 11.2.0.1.0 on Linux x86 I've http://www.dba-oracle.com/t_ora_12537_tns_error.htm just installed a database patch, which seems to have gone well. A pre-requisite for this was shutting down the database. Following install, I restarted the database but now cannot connect to it unless I'm connecting internally. When I attempt to connect normally, I get this: sqlplus ray@bvcloneSQL*Plus: Release 11.2.0.1.0 Production on Wed Nov 9 16:04:12 2011 Copyright (c) 1982, 2009, https://community.oracle.com/thread/2310310 Oracle. All rights reserved. Enter password: ERROR: ORA-12537: TNS:connection closed I've looked at a number of threads on this, none of which seem to help. Both tnsnames.ora and listener.ora are looking at the same port (1521) The only clue I have is that tnsping gives different results when run as different users: As oracle on Linux: tnsping bvclone(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = atlas)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = bvclone))) OK (0 msec) As myself on Linux: tnsping bvclone TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 09-NOV-2011 16:09:51 Copyright (c) 1997, 2009, Oracle. All rights reserved. Used parameter files: Used HOSTNAME adapter to resolve the alias Attempting to contact (DESCRIPTION=(CONNECT_DATA=(SERVICE_NAME=))(ADDRESS=(PROTOCOL=TCP)(HOST=nn.nnn.nn.nnn)(PORT=1521))) TNS-12535: TNS:operation timed out I can see that the service name is missing, which suggests I'm missing something blindingly obvious here....any thoughts on what this could be would be much appreciated. Thanks, Ray Edited by: 896276 on 09-Nov-2011 08:22 Edited by: 896276 on 09-Nov-2011 08:22 I have the same question Show 0 Likes(0) 21520Views Tags: none (add) 11gContent tagge
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Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top ORA-12537: TNS:connection closed up vote 1 down vote favorite I'm seeing random TNS connection closed errors when connecting to one of our databases. It's not affecting all users. (Appears to be happening during spikes of user activity) Occasionally I'm also seeing ORA-12518: TNS:listener could not hand off client connection. The connections are being made from .Net using the ODP driver. (Which generates a lot of connect/disconnect activity) oracle share|improve this question edited Jun 16 '09 at 20:33 asked Jun 16 '09 at 20:11 jeffspost 842513 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote accepted From here: Your server is probably running out of memory and need to swap memory to disk. One cause can be an Oracle process consuming too much memory. A possible workaround is to set following parameter in the listener.ora and restart the listener: DIRECT_HANDOFF_TTC_LISTENER=OFF Should you be working with Multi threaded server connections, you might need to increase the value of large_pool_size. You could examine the listener log file. By issuing the lsrnctl status command you can see log file. Check listener parameter file and see listener version. See this blog post for other possible causes and additional help: ORA-12518: TNS:listener could not hand off client connection share|improve this answer edited Jun 16 '09 at 20:29 answered Jun 16 '09 at 20:20 splattne 23.8k1686138 add a comment| up vote 1 down vote Something crazy, but I used to see this issue when I was trying to do an OCI call to a 10g database using an older 9i driver. You might want to check your driver version to make sure it matches the database you're trying to connect to. share|improve this answer answered Jun 16 '09 at 20:26 Keith 388311 Did it happen all the time with a mismatched driver? Or just randomly? What I'm seeing is random. –jeffspost Jun 16 '09 at 20:32 Totally random - took me 6 months to isolate it, we thought it was