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JR63293: MULTI-THREADED DB2FMP TRAPPED IN SYBASE CALLS INTERMITTENTLY

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Federation Server with Sybase wrapper calls Sybase Open client
    routines communicating with a Sybase database. A Multi-threaded
    Sybase wrapper may call some Sybase routines which are
    thread-unsafe without serialization under certain conditions,
    this results in random traps. These routines are cs_ctx_alloc,
    cs_ctx_drop, ct_init and ct_exit, so the trap stack will have
    one of them.
    
    One typical trap stack:
    cfg__check_section
    cfg__parse
    cfg___load_config
    comn_init_cfg
    ct___load_config
    ct__ctx_cfg
    ct_init
    FencedCtlib_Server::initialize_my_server
    FencedRelational_Server::initialize_server
    Wrapper::get_server
    sqlqg_FMP_FindServer
    sqlqgRouter
    sqlqg_fedstp_hook
    sqlqgDyload
    sqlerFedFmpListener
    sqlerWorkerThreadEntry
    start_thread
    clone
    
    The top stacks can be various:
    cfg__lex
    cfg__nexttok
    cfg__parse
    comn_init_cfg
    ct___load_config
    ct__ctx_cfg
    ct_init
    
    cfg__catbuf
    cfg__add_entry
    cfg__parse
    comn_init_cfg
    ct___load_config
    ct__ctx_cfg
    ct_init
    
    lm_list_alloc_ex
    lm_list_alloc
    cfg__add_section
    cfg__parse
    comn_init_cfg
    ct___load_config
    ct__ctx_cfg
    ct_init
    
    lm_list_drop
    lm_list_op
    comn_drop_cfg
    cs_ctx_drop
    
    
     __libc_malloc
    com_conv_init
    cs_ctx_alloc
    
    comn_join_thread
    ...
    ct_exit + 0x0299
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * all                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to 11.5.6                                            *
    ****************************************************************
    

Problem conclusion

  • Upgrade to 11.5.6
    

Temporary fix

Comments

APAR Information

  • APAR number

    JR63293

  • Reported component name

    FEDERATION SERV

  • Reported component ID

    5724N9700

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2021-02-04

  • Closed date

    2021-11-02

  • Last modified date

    2021-11-02

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

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

    IT35805

Fix information

  • Fixed component name

    FEDERATION SERV

  • Fixed component ID

    5724N9700

Applicable component levels

  • RB50 PSN

       UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS2K5T","label":"InfoSphere Federation Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"B10","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
04 May 2022