IBM Support

IT36524: TRAP IN FUNCTION SQLPLRL WHEN DROPPING A SYSTEM TEMPORARY TABLE CREATED BY A QUERY RUNNING ON A HADR STANDBY

A fix is available

Db2 Version 11.1 Mod 4 Fix Pack 7 for Linux, UNIX, and Windows

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • When replay-only window avoidance is enabled on a HADR standby,
a trap could be encountered during drop of a system temporary
table that was created by a query running on the standby and the
temporary table was created in a temporary tablespace that is
managed by database. A stack similar to the following will be
seen



<StackTrace>

-----FUNC-ADDR---- ------FUNCTION + OFFSET------

0x00007F1632B48CA6
_Z25ossDumpStackTraceInternalmR11OSSTrapFileiP7siginfoPvmm +
0x0356


(/udb/home/udbxinsp/sqllib/lib64/libdb2osse.so.1)

0x00007F1632B488EB ossDumpStackTraceV98 + 0x002b


(/udb/home/udbxinsp/sqllib/lib64/libdb2osse.so.1)

0x00007F1632B44AD7 _ZN11OSSTrapFile6dumpExEmiP7siginfoPvm +
0x00d7


(/udb/home/udbxinsp/sqllib/lib64/libdb2osse.so.1)

0x00007F163A3AC5E7 sqlo_trce + 0x03c7

                (/udb/home/udbxinsp/sqllib/lib64/libdb2e.so.1)

0x00007F163A51863B sqloEDUCodeTrapHandler + 0x03cb

                (/udb/home/udbxinsp/sqllib/lib64/libdb2e.so.1)

0x00007F16420B3630 address: 0x00007F16420B3630 ; dladdress:
0x00007F16420A4000 ; offset in lib: 0x000000000000F630 ;

                (/lib64/libpthread.so.0)

0x00007F163A7A5F00 _Z7sqlplrlP9sqeBsuEduP14SQLP_LOCK_INFOm +
0x02f0

                (/udb/home/udbxinsp/sqllib/lib64/libdb2e.so.1)

0x00007F1635263D56
_Z11sqldDropObjP8sqeAgentP12SQLB_GLOBALSP8SQLD_TCBP16SQLB_OBJECT
_DESCi + 0x05f6

                (/udb/home/udbxinsp/sqllib/lib64/libdb2e.so.1)

0x00007F1635262BE5
_Z13sqldDropTableP8sqeAgentP12SQLB_GLOBALSP8SQLD_TCBi + 0x06c5

                (/udb/home/udbxinsp/sqllib/lib64/libdb2e.so.1)

0x00007F1634DD44B3
_Z26sqlbPFPrefetcherEntryPointP16sqbPrefetcherEdu + 0x1023

                (/udb/home/udbxinsp/sqllib/lib64/libdb2e.so.1)

0x00007F1634DD3404 _ZN16sqbPrefetcherEdu6RunEDUEv + 0x0024

                (/udb/home/udbxinsp/sqllib/lib64/libdb2e.so.1)

0x00007F163BFEFEEE _ZN9sqzEDUObj9EDUDriverEv + 0x01be

                (/udb/home/udbxinsp/sqllib/lib64/libdb2e.so.1)

0x00007F163A515B1A sqloEDUEntry + 0x057a

                (/udb/home/udbxinsp/sqllib/lib64/libdb2e.so.1)

0x00007F16420ABEA5 address: 0x00007F16420ABEA5 ; dladdress:
0x00007F16420A4000 ; offset in lib: 0x0000000000007EA5 ;

                (/lib64/libpthread.so.0)

0x00007F1631B508DD clone + 0x006d

                (/lib64/libc.so.6)

Local fix

  • Workaround :
The problem occurs when avoid replay only window is enabled,  a
read on standby query creates a temporary table and the
temporary tablespace used for the temp table is managed by
database. Customer can check that they are using database
managed temporary tablespaces by running "db2 list tablespaces"


Two options to get around the issue

 db2set DB2_HADR_ROS_AVOID_REPLAY_ONLY_WINDOW=OFF
 OR
create system temporary tablespace as managed by system

Problem summary

  • ****************************************************************
* USERS AFFECTED:                                              *
* ALL                                                          *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to 11.1.4.7                                          *
****************************************************************

Problem conclusion

  • Upgrade to 11.1.4.7

Temporary fix

  • See local fix

Comments

  • 



APAR Information




    

  • APAR number
    IT36524
    • 

  • 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
    2021-04-09
    • 

  • Closed date
    2022-04-17
    • 

  • Last modified date
    2022-04-17
    • 





    

  • 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":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            03 May 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
Page Feedback