How to fix the Oracle error ORA-12829: Deadlock – itls occupied by siblings at block string of file string?

In this post, you’ll learn more about the Oracle ErrorORA-12829: Deadlock – itls occupied by siblings at block string of file string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12829: Deadlock – itls occupied by siblings at block string of file string

Reason for the Error ORA-12829: Deadlock – itls occupied by siblings at block string of file string

parallel statement failed because all itls in the current block are occupied by siblings of the same transaction.

How to fix the Error ORA-12829: Deadlock – itls occupied by siblings at block string of file string ?

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

increase MAXTRANS of the block or reduce the degree of parallelism for the statement. Reexecute the statement. Report suspicious events in trace file to Oracle Support Services if error persists.