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IT30111: SEGMENTATION VIOLATION IN __INTEL_SSSE3_REP_MEMCPY (MEMCPY) IN FENCEDDRDA_SERVER::INITIALIZE_MY_SERVER

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APAR status

  • Closed as program error.

Error description

  • Customer reproduces SEGV in memcpy at regular basis with the
    following stack:
    
    0x00007FC20A83FCA6 ossDumpStackTraceInternal(unsigned long,
    OSSTrapFile&, int, siginfo*, void*, unsigned long, unsigned
    long) + 0x0356
    0x00007FC20A83F8EB ossDumpStackTraceV98 + 0x002b
    0x00007FC20A83BAD7 OSSTrapFile::dumpEx(unsigned long, int,
    siginfo*, void*, unsigned long) + 0x00d7
    0x00007FC2120A45E7 sqlo_trce + 0x03c7
    0x00007FC21221063B sqloEDUCodeTrapHandler + 0x03cb
    0x0000003F2320F7E0 address: 0x0000003F2320F7E0 ; dladdress:
    0x0000003F23200000 ; offset in lib: 0x000000000000F7E0 ;
    0x000000000042D490 __intel_ssse3_rep_memcpy + 0x2960
    0x00007FC2126EFB54 sqlqgrelsc(int, int, sqlr_token*) + 0x0174
    0x00007FC2126EFEC5 sqlqgrerdc(char const*, int, int,
    sqlr_token*) + 0x0185
    0x00007FC2126F1248 sqlqgError(char*, int, int, ...) + 0x0198
    0x00007FA5B27288CC
    FencedDRDA_Server::initialize_my_server(Server_Info*) + 0x020c
    0x00007FC2127AE0A2
    FencedRelational_Server::initialize_server(Server_Info*, int) +
    0x01a2
    0x00007FC212764C60 Wrapper::get_server(unsigned char*,
    Server_Info*, int*) + 0x00a0
    0x00007FC2127A7ABC sqlqg_FMP_FindServer(unsigned char*,
    sqlqg_FMP_Request*, FencedServer**) + 0x039c
    0x00007FC212798738 sqlqgRouter(sqlqg_FMP_Request*,
    sqlqg_FMP_Reply**, sqlri_ufob*) + 0x0188
    0x00007FA5B29CD0B2 sqlqg_fedstp_hook + 0x0082
    0x00007FC2126EF1F7 sqlqgDyload(sqlri_ufob*) + 0x00f7
    0x00007FC213003370 sqlriFedInvokeInvoker(sqlri_ufob*,
    sqlqg_Fmp_Info*) + 0x0640
    0x00007FC212757656 sqlqg_Call_FMP_Thread(sqlqg_FMP_Request*,
    sqlqg_FMP_Reply**) + 0x0266
    0x00007FC212745C25 sqlqgFedStart(UnfencedServer*, char, bool*) +
    0x0cb5
    0x00007FC21273E564 sqlqgCreateNickInfo(Nickname_Info*,
    Nickname_Info**) + 0x0134
    0x00007FC212725304 sqlqgRegisterNickname(Nickname_Info*) +
    0x0114
    0x00007FC213424849 sqlrlc_fed_fetch_3pn_pd(sqlrr_cb*, unsigned
    char*, unsigned short, unsigned char*, unsigned short, unsigned
    char*, unsigned short, void**) + 0x06d9
    0x00007FC2133F4401 sqlrlc_fed_load_entry(sqlrr_cb*,
    sqlrlc_entry_fed*, unsigned int, unsigned int, unsigned int,
    unsigned int*) + 0x02d1
    0x00007FC2133F39B3 sqlrlc_load_entry(sqlrr_cb*,
    sqlrlc_entry_common*, unsigned int, unsigned int, unsigned int,
    unsigned int*) + 0x0093
    
    In db2diag.log:
    2019-08-08-12.52.57.745419+120 I83989275E619         LEVEL:
    Error
    PID     : 25617                TID : 140467215787776 PROC :
    db2sysc 0
    INSTANCE: db2inst4             NODE : 000            DB   :
    UNLSULY2
    APPHDL  : 0-4020               APPID:
    10.158.37.174.65206.190808113428
    AUTHID  : DNLSULY              HOSTNAME: db-db2hh1cv0103t
    EDUID   : 5176                 EDUNAME: db2agent (UNLSULY2) 0
    FUNCTION: DB2 UDB, base sys utilities, sqleagnt_sigsegvh,
    probe:1
    MESSAGE : Error in agent servicing application with coor_node:
    DATA #1 : Hexdump, 2 bytes
    0x00007FC11240F692 : 0000
    ..
    
    2019-08-08-12.52.57.745846+120 I83989895E626         LEVEL:
    Error
    PID     : 25617                TID : 140467215787776 PROC :
    db2sysc 0
    INSTANCE: db2inst4             NODE : 000            DB   :
    UNLSULY2
    APPHDL  : 0-4020               APPID:
    10.158.37.174.65206.190808113428
    AUTHID  : DNLSULY              HOSTNAME: db-db2hh1cv0103t
    EDUID   : 5176                 EDUNAME: db2agent (UNLSULY2) 0
    FUNCTION: DB2 UDB, base sys utilities, sqleagnt_sigsegvh,
    probe:2
    MESSAGE : Error in agent servicing application with
    coor_agent_index:
    DATA #1 : Hexdump, 2 bytes
    0x00007FC11240F690 : B40F
    ..
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to Db2 11.1 Mod 4 Fixpack 5 or higher                *
    ****************************************************************
    

Problem conclusion

  • First fixed in Db2 11.1 Mod 4 Fixpack 5
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT30111

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-08-28

  • Closed date

    2020-01-20

  • Last modified date

    2020-01-20

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

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

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • RB10 PSN

       UP

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSEPGG","label":"DB2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
20 January 2020