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Internal Network Communication Error

TNS:internal network communication error when connecting after freshinstallation October 8, 2009 ronnyegner Leave a comment Go to comments Dear Readers, my blog has moved to a different server. The new address is: http://blog.ronnyegner-consulting.de Recently i came across a problem i thought was fixed since 10g: After a fresh installation of oracle 10g when trying to connect to the instance (for instance to create the database for the first time) you get the following error: oracle@host#:> sqlplus /nolog SQL*Plus: Release - Production on Do Oct 8 08:23:18 2009 Copyright (c) 1982, 2007, Oracle.  All Rights Reserved. SQL> connect / as sysdba ERROR: ORA-12157: TNS: internal network communication error. This error is related to the linking phase when installing oracle. In your environment used during installation the variable TMPDIR pointed to a non existing directory. When linking oracle some adapters (like tcp) were not linked correctly. You can verify this with: oracle@host#:> cd $ORACLE_HOME oracle@host#:~/bin> adapters oracle /u01/app/oracle/product/oracle/bin/adapters: line 70: /u01/app/oracle/product/oracle/temp/naetab18456: no such file or directory /u01/app/oracle/product/oracle/bin/adapters: line 71: /u01/app/oracle/product/oracle/temp/nautab18456: no such file or directory /u01/app/oracle/product/oracle/bin/adapters: line 296: /u01/app/oracle/product/oracle/temp/exec18456: no such file or directory Oracle Net transport protocols linked with oracle are: Oracle Net naming methods linked with oracle are: Oracle Advanced Security options linked with oracle are: The solution for this is to relink oracle again. Make sure you create the missing $TMPDIR first or change $TMPDIR to point to a existing and writeable directory: oracle@host#:> cd $ORACLE_HOME/network/lib oracle@host#:> make -f ins_net_client.mk ntcontab.o oracle@host#:> cd $ORACLE_HOME/bin oracle@host#:> genclntsh oracle@host#:> cd $ORACLE_HOME/rdbms/lib oracle@host#:> make -f ins_rdbms.mk install oracle@host#:> cd $ORACLE_HOME/sqlplus/lib oracle@host#:> make -f ins_sqlplus.mk install oracle@host#:> cd $ORACLE_HOME/network/lib oracle@host#:> make -f ins_net_client.mk install oracle@host#:> cd $ORACLE_HOME/network/lib oracle@host#:> make -f ins_net_server.mk install You can verify it by running "adapters oracle" again: oracle@host#:> cd $ORACLE_HOME oracle@host#:~/bin> adapters oracle Oracle Net transport protocols linked with oracle are: IPC BEQ TCP/IP SSL SDP/IB RAW Oracle Net naming methods linked with oracle are: Local Naming (tnsnames.ora) Oracle Directory Naming O

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Troubleshooting & diagnosing TNS SQL*Net connectivity errors Oracle Database Tips by Burleson Consulting There are a variety of common network connectivity error messages, and most DBA's https://ronnyegner.wordpress.com/2009/10/08/ora-12157-tnsinternal-network-communication-error-when-connecting-after-fresh-installation/ have seen TNS error messages these at sometime in their careers. Here is just a small sample of possible TNS network connectivity-related errors: TNS-12545: Connect failed because target host or object does not exist ORA-12154: TNS: Could not resolve service name ORA-12157: TNS Internal network communication error In the simplest of http://www.dba-oracle.com/t_troubleshooting_sql_net_connectivity_errors.htm terms, the Oracle*Net architecture is like peeling on onion, with one transport layers nested inside the inner payer. The lowest level of Oracle transport is TCP/IP (or rarely other protocols), where the packets are shipped between the servers. Steps to troubleshoot Oracle connectivity: Also see my notes on Oracle network tuning. To troubleshoot & diagnose Oracle connectivity problems, I like to start at the simplest, outermost level, and follow this checklist: Check with "ping" using the IP address ("ping") Check with "ping" using DNS name (e.g. "tnsping uranus") Try telnet to the IP on port 1521 (telnet 1521) Check with "tnsping" using TNS service name Invoke SQL*Plus from the OS command line "sqlplus fred@flintstone". If this fails, check to ensure that your listener has the flintstone service defined. Sign-on to SQL*Plus and connect with the TNS name ("connect fred/flintstome@service_name") Within SQL*Plus, try a select from table@remote_db_link Let's look closer as

these days. It seems every time you do you risk offending someone. Tag me stupid, baby! seemed more than a little relevant. The comments associated with some high-profile blogs only serve to depress me more. It's like the https://oracle-base.com/blog/2005/07/28/tns-12157-tnsinternal-network-communication-error/ pedants and PC freaks have come out in force lately. I don't know what the answer is and I'm sure, like everyone else, I am part of the problem, but I think everyone should take a step back from the keyboard and chill out! I'm not sure how I'm going to approach my next posts as my enthusiasm has died a little due to all this. Remember, this post is not about internal network you, it's not a criticism of you and if you take it that way you are merely proving my point. Cheers Tim… Author: Tim... I DBA, Developer, Author, Trainer. View all posts by Tim... Author Tim...Posted on July 28, 2005June 14, 2006Categories Oracle, Random 7 thoughts on “TNS-12157 TNS:internal network communication error” Bill S. says: July 28, 2005 at 2:24 pm Tim, I think the problem is that it's hard to gauge someone's internal network communication intent when you can't see them. I am always afraid of offending someone inadvertently simply by the way I phrased something (as you probably already know ;-D). Additionally, there are those folks out there (you KNOW who you are ;-D) who are simply masters of the double entendre (sp?). You look at what they wrote and immediately see 2 different meanings - but which one did they REALLY mean? There's also the speed factor - it takes about .25 seconds to hit the enter key - but you can agonize over what got sent for a loooong time. A little forethought goes a long way. Now if I could just practice what I preach….. 😀 Tim... says: July 28, 2005 at 9:23 pm I know what you're saying. If I know I'm in a bad mood I make sure I reread messages before sending them, making sure to remove some of the venom. My real problem is when I'm in a good mood I make flippant comments without thinking (I do this in conversation also), but on the forums they come back to haunt me. Such is life 🙂 Aman Sharma says: July 29, 2005 at 5:16 am /*I'm not sure how I'm going to approach my next posts as my enthusiasm has died


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