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3075572 - signal 11 in uwpredisconnect holding spinlock kwt_spinlock

Symptom

  • ASE hits a signal 11 at address uwpredisconnect
  • Stack trace includes function err_disconnect_allchildren and err_pll_secondary_processing
  • Server goes down because the spid is holding Kernel->kwt->kwt_spinlock
  • Error log entries include:

    a full stack example is attached in file Full_stack_example.txt

    Current process (0x5ceb0126) infected with signal 11 (SIGSEGV)
    Address 0x0x000000000157cb1e (uwpredisconnect+0x55e), siginfo (code, address) = (1, 0x0x000000000000001c)

    Spinlocks held by  kpid 1558905126
    Spinlock Kernel->kwt->kwt_spinlock at address 0x0000000147d79f80 owned by 1558905126

  • stack trace including:
           
         uwpredisconnect
         err_disconnect_allchildren
         err_pll_secondary_processing
         pll_parent_handler
         exec_lava
         s_execute
         sequencer
         execproc
         s_execute
         sequencer
         tdsrecv__dynexec
         tdsrecv_dynamic


  


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Environment

  • SAP Adaptive Server Enterprise (ASE) 16.0

Product

SAP Solution Manager 7.2

Keywords

infected, signal 11, spinlock, kwt_spinlock, shutdown, uwpredisconnect, err_disconnect_allchildren, err_pll_secondary_processing, CR#825172, CR 825172, 825172 , KBA , BW-SYS-DB-SYB , BW on Adaptive Server Enterprise , Problem

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