Troubleshooting and Limitations – Oracle RAC Discovery

Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

This section describes troubleshooting and limitations for Oracle RAC Discovery.

Error Message	Description
Failed to lookup host name. No RAC CI will be created.	For one or more nodes, the job failed to retrieve the FQDN (fully qualified domain name) from the listeners listened_ips attribute information. Check the logs to retrieve the IP and destination. Make sure that the FQDN for that IP can be obtained either from the DNS or from the host file.
No RAC CI are retrieved.	Not all nodes were discovered with the correct listener information.
Discovery cannot discover links to the remote machines (database clients)	This can occur in the following situation: The discovered database reports its clients by their host names and not by their IP addresses, and the host name cannot be resolved to an IP address. In this case, the remote client cannot be created.

Error Message

Description

Failed to lookup host name. No RAC CI will be created.

For one or more nodes, the job failed to retrieve the FQDN (fully qualified domain name) from the listeners listened_ips attribute information.

Check the logs to retrieve the IP and destination.
Make sure that the FQDN for that IP can be obtained either from the DNS or from the host file.

No RAC CI are retrieved.

Not all nodes were discovered with the correct listener information.

Discovery cannot discover links to the remote machines (database clients)

This can occur in the following situation: The discovered database reports its clients by their host names and not by their IP addresses, and the host name cannot be resolved to an IP address. In this case, the remote client cannot be created.