How to fix the Oracle error DIA-48109: invalid lock mode for file descriptor, [string]?

In this post, you’ll learn more about the Oracle ErrorDIA-48109: invalid lock mode for file descriptor, [string] with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

DIA-48109: invalid lock mode for file descriptor, [string]

Reason for the Error DIA-48109: invalid lock mode for file descriptor, [string]

The lock mode associated with the file descriptor was invalid in the context of the routine.

How to fix the Error DIA-48109: invalid lock mode for file descriptor, [string] ?

You can fix this error in Oracle by following the below steps

Verify that a file is not trying to obtain multiple locks and that the file is holding a lock when attempting to release the lock.