Changes in sqlnet.ora may make the database down?

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  Hello
  
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  PROD
  [oracle@qual ~] $ sqlplus "/ as sysdba".
  
  SQL * more: Release 10.2.0.1.0 - Production on Tue Mar 5 10:35:01, 2013
  
  Copyright (c) 1982, 2005, Oracle. All rights reserved.
  
  Connect to an instance is idle.
  
  SQL > startup
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  Total System Global Area 608174080 bytes
  Bytes of size 1220868 fixed
  209719036 variable size bytes
  394264576 of database buffers bytes
  Redo buffers 2969600 bytes
  Mounted database.
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  NAME
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  LSNRCTL for Linux: Version 10.2.0.1.0 - Production on March 5, 2013 10:38:30
  
  Copyright (c) 1991, 2005, Oracle. All rights reserved.
  
  Connection to (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST=qual.com) (PORT = 1521)))
  STATUS of the LISTENER
  ------------------------
  Alias LISTENER
  Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
  Start date March 5, 2013 10:36:54
  Uptime 0 days 0 hours 1 minutes 35 seconds
  Draw level off
  Security ON: OS Local Authentication
  SNMP OFF
  Parameter Listener of the /u001/app/oracle/product/10.2.0/network/admin/listener.ora file
  The listener log file /U001/app/Oracle/product/10.2.0/network/log/listener.log
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  (DESCRIPTION = (ADDRESS = (PROTOCOL = tcp)(HOST=qual.com) (PORT = 1521)))
  (DESCRIPTION = (ADDRESS = (PROTOCOL = ipc) (KEY = EXTPROC0)))
  Summary of services...
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  Instance of "PROD", State LOAN, has 2 managers of this service...
  Service 'PRODT_XPT' has 1 instance (s).
  Instance of "PROD", State LOAN, has 2 managers of this service...
  The command completed successfully
  
  SQL > exit
  Disconnected from the database to Oracle 10 g Enterprise Edition Release 10.2.0.1.0 - Production
  With partitioning, OLAP and Data Mining options
  [oracle@qual ~] $

  This last I changed the name of DB to HAVE

  Change the DB_NAME is not the ORACLE_SID. You must manually change the ORACLE_SID.

  Stop the database instance.
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  Change your ORACLE_SID of PROD WERE and disconnect and connect again.
  Make sure that your ORACLE_SID is now HAVE and that $ORACLE_HOME/dbs/initPRODT.ora
  Now start the database instance

  Hemant K Collette

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  Instead of
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  or
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  If you get
  ORA-12541: TNS:no listener
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  Then you will find lines like this in the trace file:

  -THE INFORMATION SOURCE PARAMETER FOLLOWS-
  Attempt to load system pfile source C:\oracle\network\admin\sqlnet.ora
  Source of the setting successfully loaded

  Attempt to load the local pfile source C:\Dokumente und Einstellungen\lanadvall\sqlnet.ora
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  nnfgrne: will read if path adapters
  nnfgrne: switching adapter LDAP

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  nnfloidinfocache: Info: insert the value DIRECTORY_SERVSSL = oid.host.myorg.com:389 at index 0 in NLPA_CACHE

  These are LDAP servers, he is trying.

  nnflilc: conn sync opening of oid.host.myorg.com:389

  nnflfdn: turning simplified mydb.myorg.com name to a unique name.
  nnflfdn: using the administrative context: dc = prod
  nnflfdn: the domain name resulting is cn = mydb, cn = OracleContext, dc is myorg, dc = com

  nnflrne1: runs the directory for dn: cn = mydb, cn = OracleContext, dc is myorg, dc = com
  nnflqbf: search: Base: cn = mydb, cn = OracleContext, dc is myorg, dc = com, range: 0, filter: (objectclass = *)

  nnfgrne: query fails, the leap to the next map

  Did not work. Try the other adapters:

  nnfgrne: switching adapter EZCONNECT

  snlinGetAddrInfo: name resolution failed for test64.test

  No luck.

  If the resolution is approved, it will look like this:

  nnfloidinfocache: Info: insert the value DIRECTORY_SERVERS = oid.host.myorg.com:389 at index 0 in NLPA_CACHE

  nnflilc: conn sync opening of oid.host.myorg.com:389

  nnflfdn: turning simplified mydb.myorg.com name to a unique name.
  nnflfdn: using the administrative context: dc = prod
  nnflfdn: the domain name resulting is cn = mydb, cn = OracleContext, dc is myorg, dc = com

  nnflrne1: runs the directory for dn: cn = mydb, cn = OracleContext, dc is myorg, dc = com
  nnflqbf: search: Base: cn = mydb, cn = OracleContext, dc is myorg, dc = com, range: 0, filter: (objectclass = *)

  niotns: the call to address: (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST=dbserver.host.myorg.com) (PORT = 1521)) (CONNECT_DATA = (SID = DBNAME) (CID = (PROGRAM = C:\Oracle\ora1020\bin\sqlplus.exe)(HOST=pc247596)(USER=lanadvall)))

  Yours,
  Laurenz Albe

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  Great Mary!
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  concerning
  Maurice