EYUCS0207W CICS region unresponsive and in a tight loop when using CA Date Simulator

Question & Answer

Question

Why would my CICS Transaction Server for z/OS (CICS TS) region that runs with CA Date Simulator stop responding and appear to be in a tight loop? CICSPlex SM (CPSM) put out the following messages:

EYUCS0207W cmas Connected MAS applid is not responding - APPLID(applid) CICSplex(plex)
EYUPN0005W cmas Notify created for SAM Context=plex, Target=applid, Sev=HW, Event=!!SAMNRM, Text=Non-responsive

Answer

CA Technologies provided fix TF1D336 for CA Date Simulator. The fix corrects intermittent S0C4/AKEA abends in CICS module DFHERM caused by Date Simulator during the initiation of a transaction that is being warped.

Using IPCS command VERBX DFHPDxxx 'TR=1' (where "xxx" varies with the release of CICS) to display the CICS trace in a system dump that was taken at the time of the hang shows the following exception trace entry:

 DS 0068 DSSR  *EXC* SUSP_ALREADY_SUSPENDED FUNCTION(SUSPEND) 
                     SUSPEND_TOKEN(00610005) PURGEABLE(NO)    
                     WLM_WAIT_TYPE(LOCK) RETRY(YES)

This task's current program was CMRTRUEX and in the PG domain it puts out the following error:

DFHPD0105 A loop has been detected. PLCB at address 3857D788 already encountered.

Its PLCB control block points to itself. The QR TCB is in a tight loop in DFHAPEX looping on this PLCB chain. At the time of the loop CICS is trying to put out the following message:

DFHDS0002 applid A severe error (code X'0068') has occurred in module

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGMGV","label":"CICS Transaction Server"},"Platform":[{"code":"PF035","label":"z\/OS"}],"Component":"CSPM","Version":"","Line of Business":{"code":"LOB35","label":"Mainframe SW"}}]

Product Synonym

CICS/TS CICSTS CICS TS CICS Transaction Server

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Document Information

Modified date:
05 September 2018

UID

dwa1468401

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