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ORA-600 [qerpxInitialize0] Occured In SQL with union all and Parallel with concatenate (Doc ID 1580875.1)

Last updated on FEBRUARY 26, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.3 and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

  1. A query running with parallellism fails with:
    ORA-00600: internal error code, arguments: [qerpxInitialize0], [0], [], [], [], [], [], [], [], [], [], []


  2. Review of the generated tracefiles reveals a call stack similar to:
    ... <- $cold_qerpxInitiali <- qkaParallelizersTraverse <- qkaParallelizersTraverse <- qkaParallelizersTraverse <- qkaParallelizersTraverse <- qkaParallelizersTraverse <- qkaParallelizersTraverse <- qkaParallelizersTraverse <- qkaTraverseQknDescendents <- qkaTraverseQkn <- qkadrv2Post <- qkadrv2 <- opitca <- kksLoadChild <- kxsGetRuntimeLock <- kksfbc <- kkspsc0 <- kksParseCursor <- opiosq0 <- ...


  3. The failing query shows:
    SELECT
    /*+ PARALLEL(A, 4) */ LPAD(ROWNUM, 6) || ' ' || A.COL1 || LPAD(A.COL2, 9, '0') || ' ' || LPAD(A.COL3, 2) || ' ' || LPAD(A.COL4, 4) || ' ' || LPAD(B.COL1, 18)
    FROM
    <TABLE_NAME1> A,
    <TABLE_NAME2> B
    WHERE
    A.COL1< 180
    OR A.COL1> 189
    AND B.COL1= A.COL1
    AND B.COL2= A.COL2;
    UNION ALL
    SELECT
    /*+ PARALLEL(A, 4) */ LPAD(ROWNUM, 6) || ' ' || A.COL1 || LPAD(A.COL2, 9, '0') || ' ' || LPAD(A.COL3, 2) || ' ' || LPAD(A.COL4, 4) || ' ' || LPAD(B.COL1, 18)

    NOTE: In the SQL statement above, the user information and metadata used represents fictitious data.
    Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.

Changes

 none

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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