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2024493 - Infected with Signal 11 in lock__semawait leaves ASE in a hung state - ASE

Symptom

  • Client process unexpectedly terminated
  • Phantom locks are left behind (syslocks shows locks with a spid that does not exist in sysprocesses)
  • sp_who may show processes stuck in "lock sleep", "latch sleep" or "PLC sleep" blocked by the phantom process.
  • Errorlog contains an infected with signal 11 (SIGSEGV) error with a stacktrace that shows the following functions:

lock__semawait()
lock_psema()
log__lock()
plc__flush()


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Environment

  • SAP Adaptive Server Enterprise (ASE) 15.7
  • SAP Adaptive Server Enterprise (ASE) 16.0

Product

SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 16.0

Keywords

Sybase, infected, signal, SEGV, SIGSEGV, segment violation, storage access violation, kisignal, CR764908, CR#764908 , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed

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