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2694998 - Signal 11 at address pipe_read crashing ASE due to dbt_pipemgrspin spinlock - SAP ASE


  • ASE errorlog reports a timeslice or signal 11 at address pipe_read
  • While holding spinlock dbt_pipemgrspin which crashes ASE:

Current process (0x7f503fb) infected with signal 11 (SIGSEGV)
Address 0x0000000100637860 (pipe_read+0x198)

Spinlocks held by kpid 12345678
Spinlock Dbtable->dbt_pipemgrspin at address ....

  • followed by stacktrace including functions:


  • Preceding errors pointing to parellel processing may be seen in the log
    • If so, there may be (very) many of them:

Error: 9566, Severity: 20, State: 1
Worker Process internal plan copy error for EVAL E_LPAD.
Consider running this query serially by setting the session parameter 'parallel_degree' to 1.
Please contact SAP Technical Support.

Thread (spid=1234) initiating parallel primary error processing.

followed by (many) stacktraces including function copy__eop_eval_list

  • See attachment Stack_Example.txt for un-sanitized log entries



  • SAP Adaptive Server Enterprise (ASE) 16.0 for Business Suite
  • SAP Adaptive Server Enterprise (ASE) 16.0


SAP Adaptive Server Enterprise 16.0 ; SAP ERP 6.0


spinlocks, parallel, pipe_read, pipe_write, dbt_pipemgrspin, unptn_pllscan, CR819479, CR816694, 816694, 819479, , KBA , BC-DB-SYB , SAP Business Suite on Sybase ASE Database Platform , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed

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