IT32897: POSSIBLE TRAP (SEGV) OR MEMORY ERROR IN SQLVFREELOBMEM() IF QUERYING A TABLE FUNCTION RETURNING A ROWTYPE WITH A CLOB IN IT

APAR status

• Closed as program error.

Error description

• The condition is that the CLOB in the row returned by the
  pipelined table function contains alternatively
  NULL and non NULL CLOB data. This can lead to either a SEGV
  (Trap) or to some memory 'corrupted block header'
  failures.
  
  Typical top of the stack would be:
  
  0x090000000AE6C128 sqloCrashOnCriticalMemoryValidationFailure +
  0x48
  0x090000000AED7070
  diagnoseMemoryCorruptionAndCrash__13SQLO_MEM_POOLFUlCPCcCb +
  0x4F0
  0x090000000AE6DF58
  IPRA.$sqloDiagnoseFreeBlockFailure__FP8SMemFBlkCb + 0x758
  0x090000000AE6C69C sqlofmblkEx + 0x11C
  0x090000000D449B24 sqlvFreeLobMem__FP9sqllf_cso@AF14_5 + 0x24
  0x090000000D44A688
  sqlriRowDescCopy__FP8sqlrr_cbP18sqlriRowDescriptorT2 + 0x208
  0x090000000D447840 sqlvSqlPLCopyRow__FP8sqlrr_cbP10sqlz_valueT2
  + 0x40
  0x090000000F634E64 copyData__3PVMFP10sqlz_valueT1Ulb + 0x3E4
  0x090000000F62A39C copyVariable__3PVMFUiT1 + 0xDC
  0x090000000F627E48 run__3PVMFv + 0x1348
  0x090000000F61375C pvm_entry + 0x45C
  0x090000000AE32A8C sqloInvokeFnArgs + 0x5D6C
  0x090000000E7E0558
  IPRA.$sqlriInvokerTrusted__FP10sqlri_ufobP21sqlriRoutineErrorInt
  fb + 0x2AF8
  0x090000000E7D62A8 sqlriInvokeInvoker__FP10sqlri_ufobb + 0x2008
  0x0900000011E24E44 sqlri_tfftc__FP8sqlrr_cbP9sqlri_tao + 0x324
  0x090000000DAF42BC sqlriFetch__FP8sqlrr_cbP9sqlri_taol + 0x21C
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Rowstore                                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Db2 V11.1.4.6 or higher                           *
  ****************************************************************
  

Problem conclusion

• Upgrade to Db2 V11.1.4.6 or higher
  

Temporary fix

Comments

APAR Information

• 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