IBM Support

IT02042: ABEND IN SQLAK_CALLBDRDAINPUT DUE TO MISALIGNED MEMORY ACCESS, LEADING TO SIGBUS SIGNAL

Subscribe

You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • A crash with a SIGBUS error in client side code may occur with
    the following stack :
    
      sqlak_callbDrdaInput
      sqljrGenSqlDta
      sqljrDrdaArCall
      sqleuInvokeActivationRoutine
      sqleuPerformServerActivationCheck
      sqleUCappConnect
      CLI_sqlConnect
      SQLConnect2
    
    The problems happens when DB2 accesses a 2 byte integer in a
    non-2 byte aligned location.
    Most platforms will handle this gracefully and perform a byte by
    byte copy instead in the kernel but in some cases , this signal
    may be passed to user code and trigger the SIGBUS signal causing
    a failure in the process.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * all                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade the database server to v9.7 Fix Pack 10 or higher.   *
    ****************************************************************
    

Problem conclusion

  • This problem was first fixed in v9.7 fix Pack 10
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT02042

  • Reported component name

    DB2 CONNECT

  • Reported component ID

    DB2CONNCT

  • Reported release

    970

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2014-05-27

  • Closed date

    2014-12-08

  • Last modified date

    2014-12-08

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

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

    IT02973 IT02976

Fix information

  • Fixed component name

    DB2 CONNECT

  • Fixed component ID

    DB2CONNCT

Applicable component levels

  • R970 PSN

       UP



Document information

More support for: DB2 for Linux, UNIX and Windows

Software version: 9.7

Reference #: IT02042

Modified date: 08 December 2014