ICYDIE is Media Manager's  Disabled Interrupt Exit  for I/O interrupts, 
I would guess that ICYDIE called an exit owned by the caller of
Media Manager, and that exit did the RELEASE for some unit of 
work that it had PAUSEd to wait for the I/O to complete.  From the 
SSRV 11F trace entry, 1EE5C3D6 is the return address for the 
RELEASE.  You may be able to look at that in the dump to see 
who it is.  DB2 is one possibility.

Jim Mulder z/OS Diagnosis, Design, Development, Test  IBM Corp. 
Poughkeepsie NY

> From: "Peter Hunkeler" <[email protected]>
> To: [email protected]
> Date: 12/13/2018 08:23 PM
> Subject: AW: Re: Wtrln.: Are those SSRV trace entires relate to the 
> I/O interrupt?
> Sent by: "IBM Mainframe Discussion List" <[email protected]>
> 
> >Yes, they are part of the I/O interrupt processing, and are not related 

> to the interrupted program (unless the I/O operation that caused 
> the interrupt is related to the interrupted program) . 
> 
> Thanks, Jim. 
> 
> Can you say something about when they occur and when not? Just 
> curious because I see them most of the time in this dump but only 
> occasionally in other dumps, it seems.



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