Описание ошибки Oracle : ORA-16627


16627, 0000, "operation disallowed since no standby databases would remain to support protection mode"
*Cause: This status was returned because of one of the following:
- The broker rejected an attempt to change the overall
configuration protection mode since it could not find any
enabled standby databases that supported the proposed protection
mode.
- The broker rejected an attempt to enable the configuration
if it determined that there were no enabled standby databases
that supported the overall protection mode.
- The broker rejected an attempt to disable or remove a database
that, if disabled or deleted, would result in no remaining
standby databases that could support the overall configuration
protection mode.
- The broker rejected an attempt to switchover if doing so would
violate the overall configuration protection mode.
- Performing automatic health check if the broker determined that
no standby datbases supported the overall protection mode.
*Action: - If changing the overall protection mode, confirm that at least
one standby database satisfies the new protection mode.
- For enable failures, confirm that at least one standby database
has a LogXptMode configurable property setting that supports
the current overall protection mode.
- For delete and disable failures, confirm that at least one
other standby database has a LogXptMode configurable property
setting that supports the overall protection mode.
- For switchover failures that occur when the configuration
is operating in maximum protection or maximum availability
mode, confirm that at least one other standby database has its
LogXptMode configurable property set to the value "SYNC".
If the configuration contains a primary database and a single
standby database and is operating in either maximum protection
or maximum availability mode, ensure that the LogXptMode
configurable property of the primary database is set to the
value "SYNC". Since the old primary database will become the
standby database after switchover completes, its LogXptMode
configurable property setting must support the configuration
protection mode.
- For health check error, confirm that at least one standby
database has a LogXptMode configurable property setting
that supports the current overall protection mode.

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