IT13451: ASSERT FAILURE IN LOWMEMORYMGR THREAD WITHIN KILL_IDLE_SESSIONS WHICH ALSO RESULTS IN A SYSTEM HANG

APAR status

• Closed as program error.

Error description

• ENV : IDS 12.10.TC6
  
  The online.log shows ...
  
  12:31:06  Assert Failed: Exception Caught. Type: MT_EX_OS,
  Context: mem
  12:31:06   Who: Session(34, informix@, 0, 00000000)
                  Thread(66, LowMemoryMgr, 0, 1)
                  File: mtex.c Line: 1174
  
  and the stack shows ...
  
  Exception happened at address=0x00AF0746
  Exception is EXCEPTION_ACCESS_VIOLATION (code 0xc0000005)
  Attempt to read location 0x119c
  Register Contents:
      EAX=0x0000119c  ESI=0x0008eef9  EFLAGS=0x00010206
      EBX=0x0e63fb98  EDI=0x0de75880     EIP=0x00af0746
      ECX=0x00000000  ESP=0x0e63fae4
      EDX=0x00000000  EBP=0x0e63faf8
  Call Stack for thread #66 - LowMemoryMgr
  (oninit)_kill_idle_sessions
  (oninit)_db_low_memory_mgr
  (oninit)_udrlm_clang_execute_internal
  (oninit)_udrlm_clang_execute
  (oninit)_udrlm_exec_routine
  (oninit)_udr_execute
  (oninit)_dbsched_start_udr
  (oninit)_th_init_initgls
  (oninit)_startup
  
  The assert failure and shared memory dump are created but the
  system then remains in a hung / zombie state and no one can
  connect and no onmode commands work.  The engine has to be
  killed.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Any Windows user.                                            *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Update to IBM Informix Server 12.10.xC7                      *
  ****************************************************************
  

Problem conclusion

• Problem Fixed In IBM Informix Server 12.10.xC7
  

Temporary fix

Comments

APAR Information

• 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

• RC10 PSN

     UP

• RC10 PSY

     UP