GETTING U4093 ON CCI START-UP with z/OS 2.1

Document ID : KB000017376
Last Modified Date : 14/02/2018
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Problem:

IPL'ed new z/OS 2.1 (ugrade from z/OS 1.12) operating system and now having problems starting the CCI tasks. A U4093 abend can be witnessed:

IEA995I SYMPTOM DUMP OUTPUT
  USER COMPLETION CODE=4093 REASON CODE=00000090
 TIME=15.47.11  SEQ=00383  CPU=0000  ASID=006F
 PSW AT TIME OF ERROR  078D1000   8003C53E  ILC 2  INTC 0D
   ACTIVE LOAD MODULE           ADDRESS=0003AB78  OFFSET=000019C6
   NAME=CEEBINIT
 DATA AT PSW  0003C538 - 00181610  0A0DA7F4  001C1811
 GR 0: 00000000_84000000   1: 0000001C_84000FFD
    2: 00000000_00000090   3: 00000000_0B0C00FD
    4: 00000000_0004F340   5: 00000000_80045780
    6: 00000000_0004F340   7: 00000000_0003C502
    8: 00000000_80000000   9: 00000000_08EDB8B6
    A: 00000000_00000001   B: 00000000_8003C460
    C: 00000000_00050C18   D: 00000000_1C81B018
    E: 00000000_88EDA00E   F: 7F655000_00000090
END OF SYMPTOM DUMP
IEF450I CCITCP CCITCP - ABEND=S000 U4093 REASON=00000090

Resolution:

Review required system security changes in relation to OMVS segments.

Starting with z/OS 2.1, IBM has eliminated the security calls related to BPX.DEFAULT.USER. In doing so, IBM is enforcing the requirement that all Unix Systems Services (USS) work requires the userid (ACID) to have established USS credentials. This includes a unique UID, assigned default group and Home.

See Knowledge Document: TEC601436 (CA-Top Secret for z/OS).
See Knowledge Document: TEC599992 (CA-ACF2 for z/OS).