Comments on: Intermittent ORA-12545 When Trying To Connect To RAC Database http://www.davidyahalom.com/index.php/intermittent-ora-12545-when-trying-to-connect-to-rac-database/ Innovative Integration Sun, 05 Feb 2012 00:02:56 +0000 http://wordpress.org/?v=2.2.2 By: Evil Genius http://www.davidyahalom.com/index.php/intermittent-ora-12545-when-trying-to-connect-to-rac-database/#comment-24697 Evil Genius Thu, 15 Apr 2010 08:04:15 +0000 http://www.davidyahalom.com/index.php/intermittent-ora-12545-when-trying-to-connect-to-rac-database/#comment-24697 Hi, We've finally solved this behaviour following the metakink note: How To Configure Dispatchers For RAC Environment [ID 578524.1] "Note: It is very important to use entire address string in order to configure dispatchers on RAC and host name used in it should be a VIP hostname, otherwise connection may suffer intermittent ORA-12545 errors. Refer metalink note >" The solution was to set the parameter DISPATCHERS on every node of the cluster pointing to the node-vip as a connection string: {noformat} alter system set dispatchers='(address=(protocol=tcp)(host=$HOSTNAME-vip)) (dispatchers=2)' scope=both sid='$ORACLE_SID'; {noformat} Regards, Enric Moya Hi,

We’ve finally solved this behaviour following the metakink note: How To Configure Dispatchers For RAC Environment [ID 578524.1]

“Note: It is very important to use entire address string in order to configure dispatchers on RAC and host name used in it should be a VIP hostname, otherwise connection may suffer intermittent ORA-12545 errors. Refer metalink note >”

The solution was to set the parameter DISPATCHERS on every node of the cluster pointing to the node-vip as a connection string:

{noformat}
alter system set dispatchers=’(address=(protocol=tcp)(host=$HOSTNAME-vip)) (dispatchers=2)’ scope=both sid=’$ORACLE_SID’;
{noformat}

Regards,

Enric Moya

]]> By: Dan Norris http://www.davidyahalom.com/index.php/intermittent-ora-12545-when-trying-to-connect-to-rac-database/#comment-53 Dan Norris Wed, 23 Jul 2008 13:43:33 +0000 http://www.davidyahalom.com/index.php/intermittent-ora-12545-when-trying-to-connect-to-rac-database/#comment-53 Are you saying that there are times when database clients do not need to resolve DNS names? I always expect that some sort of name resolution is present on all database clients. If there's a problem, it's usually that DNS entries weren't created or were created incorrectly. Are you saying that there are times when database clients do not need to resolve DNS names? I always expect that some sort of name resolution is present on all database clients. If there’s a problem, it’s usually that DNS entries weren’t created or were created incorrectly.

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