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2701636 - Boot time trace flag-T4049 may cause ASE scheduler infected and ASE down -- SAP ASE


Sequence of three events in ASE errorlogs:

  1. Timed out new connection -- due to -T4049

    "server Timed out waiting for login on logical connection 0"
  2. Signal 11 in routine usrcancel() and stack trace
    "kernel Current process (0x0) infected with signal 11 (SIGSEGV)
     kernel Current Process is running on Engine 3
     kernel Address 0x0x00000000014bf78e (usrcancel+0xce), siginfo (code, address) = (1, 0x0x0000000000000040)"
  3. Scheduler infected
    "kernel Scheduler infected: exiting"



  • SAP Adaptive Server Enterprise (ASE) 15.7 and 16.0
  • SAP Adaptive Server Enterprise Cluster Edition (ASE CE) 15.7 and 16.0


SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 16.0


Signal 11, usrcancel, -T4049, trace flag 4049, 4049, Scheduler infected, Timed out waiting for login on logical connection , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem

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