ORA-01157: Cannot Identify/Lock Data File and ORA-27050 (Doc ID 268061.1)

Last updated on AUGUST 31, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.4 to 11.2.0.3 [Release 9.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 29-Aug-2016***

Symptoms

The following messages are signalled in the alert.log when issuing alter database datafile:

ORA-01157: cannot identify/lock data file # - see DBWR trace file
ORA-01110: data file #: 'filename'
ORA-27050: function called with invalid FIB/IOV structure
Additional information: 11


You also see the following messages in the alert.log on startup:

Oracle instance running on a system with low open file descriptor limit.

Cause

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