ORA-12850: Could not allocate slaves on all specified
instances: string needed, string allocated



ORA-12850: Could not allocate slaves on all specified instances: string needed, string allocated..

Answer / guest

Cause: When executing a query on a gv$ fixed view, one or
more instances failed to allocate a slave to process query.

Action: Check trace output for instances on which slaves
failed to start. GV$ query can only proceed if slaves can be
allocated on all instances.

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