IBM Support

IT39943: THREAD ON PRIMARY OF HDR PAIR CAN HANG IN CDRLSQN_WAIT WHEN DRINTERVAL 0 AND HDR_TXN_SCOPE NEAR_SYNC

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APAR status

  • Closed as program error.

Error description

  • When you have a single sqlexec thread executing DML, it is
possible that it can hang for unexpectedly long
durations sleeping forever trying to commit in a stack
like:

0x0000000001c14ed2 (oninit) yield_processor_mvp
0x0000000001be7b09 (oninit) mt_yield
0x000000000150d54f (oninit) cdrLSNQ_Wait
0x0000000001780143 (oninit) hdrSyncTxnMode
0x00000000018af936 (oninit) proxyWaitForAllNodesFromPrimary
0x0000000000ff21a3 (oninit) rscommit
0x0000000001276298 (oninit) iscommit
0x00000000008a27c0 (oninit) sqiscommit
0x000000000083c6a0 (oninit) sqcommit
0x000000000077e667 (oninit) aud_sqcommit
0x0000000000c1e745 (oninit) sql_commit
0x0000000000c1e43b (oninit) sq_commit
0x0000000000d4c0e7 (oninit) sqmain
0x0000000001dbeecd (oninit) listen_verify
0x0000000001dbdf08 (oninit) spawn_thread
0x0000000001ba9c27 (oninit) th_init_initgls
0x0000000001c336ad (oninit) startup

The hang can be remedied simply enough through a log buffer
flush by some other session's
DML activity, but when this is the only thread executing DML it
may continue to hang until
either a checkpoint or possibly dbscheduler activity.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 12.10.xC16 and 14.10.xC8.  *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 12.10.xC16 or 14.10.xC8.          *
****************************************************************

    



Problem conclusion


    

  • Fixed in Informix Server 12.10.xC16 and 14.10.xC8.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT39943
    • 

  • Reported component name
    INFORMIX SERVER
    • 

  • Reported component ID
    5725A3900
    • 

  • Reported release
    C10
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2022-02-11
    • 

  • Closed date
    2023-05-08
    • 

  • Last modified date
    2023-05-08
    • 





    

  • 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":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSGU8G","label":"Informix Servers"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"C10","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            08 May 2023
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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