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Sessions Hang Due to Self Deadlock on TT Enqueue (Doc ID 948668.1)

Last updated on OCTOBER 28, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 10.2.0.4 [Release 10.2]
Information in this document applies to any platform.
This problem can occur on any platform.

Symptoms

A session can hang waiting on TT enqueue while performing maintenance activities related to tablespaces/ objects on a tablespace.

Querying GV$LOCK shows that the holder of the TT enqueue is in self-deadlock on the same enqueue.

The self-deadlocked process was executing the below SQL issued from Enterprise Manager (EM).

BEGIN DBMS_SPACE.ISDATAFILEDROPPABLE_NAME(:1,:2); END;

 

EXAMPLE:

 

Cause

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In this Document
Symptoms
Cause
Solution
References


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