IBM Support

MA47036 - LIC-DB-OTHER F/HMDERIVEDHEAP x/1722 MSGMCH3203 HEAP LEAK CAUSED
USER HEAP ALLOCATION FAILURES

Subscribe to this APAR

By subscribing, you receive periodic emails alerting you to the status of the APAR, along with a link to the fix after it becomes available. You can track this item individually or track all items by product.

Notify me when this APAR changes.

Notify me when an APAR for this component changes.

 APAR (Authorized Program Analysis Report)

Abstract

LIC-DB-OTHER F/HMDERIVEDHEAP x/1722 MSGMCH3203 HEAP LEAK CAUSED
USER HEAP ALLOCATION FAILURES

Error Description

An attempt to double delete a gate in certain code paths of    
which the second attempt to delete the gate causes a general    
destructor failure (no VLOG), which leaks several kinds of      
heap. Problem symptom is MCH3203 HMDERIVEDHEAP x/80D0          
t/QQQOOODBOP/QQQOOOINV/CALLDBMAINTFOROPENOROPTIMIZE x/5094.    
VL0600BADD is also generated.                                  

Problem Summary

****************************************************************
* PROBLEM: (MA47036) Licensed Program = 5770999 for i 7.3      *
*           Usability of a Products MAJOR Function             *
*           Severe Performance Degradation                     *
*           Unpredictable Corruption                           *
****************************************************************
* USERS AFFECTED: All IBM i operating system users.            *
****************************************************************
* RECOMMENDATION: Apply LIC PTF MF64910 for i 7.3.             *
****************************************************************
A heap leak associated with a particular SQE SQL optimizer user
heap eventually caused heap allocation failures when attempting
to optimize a SQL query.                                        

Problem Conclusion

The SQE SQL optimizer attempts to clean up an internal object  
twice and this caused a silent exception that allows other heap
allocations to be leaked. The optimizer code will change to    
avoid the double delete which will prevent the heap leak from  
occurring.                                                      

Temporary Fix

                       *********                                
                       * HIPER *                                
                       *********                                

Comments

0600BADD                                                        
0600 BADD                                                      

Circumvention


PTFs Available

R720 MF64906 PTF Cover Letter   8249
R730 MF64910 PTF Cover Letter   8242

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... Yes
Component.................................. 9400DG3DB
Failing Module.......................... RCHMGR
Reported Release................... R720
Duplicate Of..............................




System i Support

IBM disclaims all warranties, whether express or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. By furnishing this document, IBM grants no licenses to any related patents or copyrights. Copyright © 1996,1997,1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 IBM Corporation. Any trademarks and product or brand names referenced in this document are the property of their respective owners. Consult the Terms of use link for trademark information

[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG15Q","label":"APARs - OS\/400 General"},"Component":"","ARM Category":[],"Platform":[{"code":"PF012","label":"IBM i"}],"Version":"V7R1M0;V7R2M0;V7R3M0","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG16C","label":"APARs - IBM i 7.1 environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF012","label":"IBM i"}],"Version":"V7R1M0;V7R2M0;V7R3M0","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG16E","label":"APARs - IBM i 7.2 environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF012","label":"IBM i"}],"Version":"V7R1M0;V7R2M0;V7R3M0","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG16G","label":"APARs - IBM i 7.3 environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF012","label":"IBM i"}],"Version":"V7R1M0;V7R2M0;V7R3M0","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
14 September 2018