IBM Support

IT40737: ASSERT POSSIBLE IN SSC_LINK WITH STMT_CACHE ENABLED IF SHMTOTAL IS STRESSED

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APAR status

  • Closed as program error.

Error description

  • The following stacks where observed in 14.10.FC8 on linux
x86_64.  Initial testing showed the problem existed in
14.10.FC4W1

These stacks are common

04/19/2022 11:51:26   Size of resident + virtual segments
16260KB + 420124KB > 420000KB
04/19/2022 11:51:26           total allowed by configuration
parameter SHMTOTAL

04/19/2022 11:51:26   Assert Failed: No Exception Handler
04/19/2022 11:51:26   IBM Informix Dynamic Server Version
14.10.FC8
04/19/2022 11:51:26    Who: Session(1978, informix@hostname,
8405, 0x45fe3da8)
                Thread(1996, sqlexec, 45fc2028, 1)
                File: mtex.c Line: 569
04/19/2022 11:51:26    Results: Exception Caught. Type:
MT_EX_OS, Context: mem
04/19/2022 11:51:26    Action: Please notify IBM Informix
Technical Support.
04/19/2022 11:51:26    See Also:
/tmp/af.bb4e88e

11:51:26  Stack for thread: 1996 sqlexec

0x00000000014cfead (oninit) afstack
0x00000000014d2c99 (oninit) mt_ex_throw_sig
0x00000000014d4890 (oninit) afsig_handler
0x00007f26025775e0 (Linux) <signal frame>
0x000000000075d455 (oninit) ssc_link
0x0000000000aa8372 (oninit) parsecmd
0x0000000000aa75c3 (oninit) sqcmd
0x0000000000aa70fd (oninit) sq_prepare
0x0000000000b93e2e (oninit) sqmain
0x0000000001603a79 (oninit) spawn_thread
0x00000000014bcfb3 (oninit) th_init_initgls
0x00000000015054cf (oninit) startup


04/19/2022 12:04:52   Size of resident + virtual segments
16260KB + 420124KB > 420000KB
04/19/2022 12:04:52           total allowed by configuration
parameter SHMTOTAL

04/19/2022 12:04:52   Assert Failed: No Exception Handler
04/19/2022 12:04:52   IBM Informix Dynamic Server Version
14.10.FC8
04/19/2022 12:04:52    Who: Session(2075,
informix@hostname,1659, 0x45fe2fa8)
                Thread(2092, sqlexec, 45fc6828, 1)
                File: mtex.c Line: 569
04/19/2022 12:04:52    Results: Exception Caught. Type:
MT_EX_OS, Context: mem
04/19/2022 12:04:52    Action: Please notify IBM Informix
Technical Support.
04/19/2022 12:04:52    See Also:
/tmp/af.c14ebb3

12:04:52  Stack for thread: 2092 sqlexec
0x00000000014cfead (oninit) afstack
0x00000000014d2c99 (oninit) mt_ex_throw_sig
0x00000000014d4890 (oninit) afsig_handler
0x00007f81793ff5e0 (Linux) <signal frame>
0x0000000000616601 (oninit) sqmktab
0x00000000006772f0 (oninit) sel2cb
0x0000000000674720 (oninit) qblk2cb
0x0000000000666cc4 (oninit) stmt2cb
0x00000000006656cd (oninit) p_sp2cb
0x000000000075cf31 (oninit) ssc_link
0x0000000000aa8372 (oninit) parsecmd
0x0000000000aa75c3 (oninit) sqcmd
0x0000000000aa70fd (oninit) sq_prepare
0x0000000000b93e2e (oninit) sqmain
0x0000000001603a79 (oninit) spawn_thread
0x00000000014bcfb3 (oninit) th_init_initgls
0x00000000015054cf (oninit) startup

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 14.10.xC9.                 *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 14.10.xC9.                        *
****************************************************************

    



Problem conclusion


    

  • Fixed in Informix Server 14.10.xC9.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT40737
    • 

  • Reported component name
    INFORMIX SERVER
    • 

  • Reported component ID
    5725A3900
    • 

  • Reported release
    E10
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2022-04-25
    • 

  • Closed date
    2022-09-29
    • 

  • Last modified date
    2022-09-29
    • 





    

  • 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
    INFORMIX SERVER
    • 

  • Fixed component ID
    5725A3900
    • 



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSGU8G","label":"Informix Servers"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"E10","Line of Business":[{"code":"LOB10","label":"Data and AI"}]}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            29 September 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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