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PH47175: CE FTP SERVER GETS 502 UNKNOWN COMMAND ERROR ON Z/OS 2.5. High CPU spikes may be noticed.

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APAR status

  • Closed as fixed if next.

Error description

  • When STFTPS30 scans the valid command table and encounters hex
    zeros the end of the table has been reached.  The check for hex
    zeros is actually looking at PSA storage.  All z/OS releases
    prior to z/OS 2.5 this storage has never been hex zeros.
    

Local fix

  • n/a
    

Problem summary

  • Message table was addressing low-storage causing needless loop
    which caused high CPU usage.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PH47175

  • Reported component name

    STR CON ENT Z/O

  • Reported component ID

    5655X0500

  • Reported release

    150

  • Status

    CLOSED FIN

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2022-06-14

  • Closed date

    2026-02-11

  • Last modified date

    2026-02-11

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels

[{"Business Unit":{"code":"BU029","label":"Software"},"Product":{"code":"SS4PRU","label":"Sterling Connect:Enterprise"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"1.5"}]

Document Information

Modified date:
11 February 2026