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'enq: UL - contention' Locks On 'select DBMS_LOCK.REQUEST(:1 ,:2 ) from dual' Are Observed when ODI 11g Load Plans with Numerous Parallel Steps Are Used Under Heavy Execution Loads (Doc ID 1684246.1)

Last updated on NOVEMBER 17, 2020

Applies to:

Oracle Data Integrator - Version and later
Information in this document applies to any platform.


An Oracle Data Integrator (ODI) Load Plan with numerous parallel steps is executed in an infinite loop.

After a couple of days running, the number of waits/locks on 

 is growing at a point that the Load Plan executions fail due to enq: UL - contentions.

After a restart of the ODI execution Agent, the executions immediately return to be normal behavior but after some time the issue is observed again.


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