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2979907 - SIgnal 11 with empty stack traces - SAP ASE


  •  ASE errorlog reports an "infected with Signal 11" error with a stack trace:

Current process (0x9d004f) infected with signal 11 (SIGSEGV)
Address 0x2020203d20202020 (), siginfo (code, address) = (50, 0x2020203d20202020)

  • The stack trace includes the following functions:


  Note: A complete stack trace is available under Attachments.

  • On AIX**, if the "secondary signal handling" configuration parameter set to 0, it is followed by the message and the ASE server keeps running:

Task 10289231 is made zombie because it cannot be cleaned up during its termination. This task may have resources allocated to it.

  • On AIX**, if the "secondary signal handling" configuration parameter set to 1 (default), it is followed by the looping messages with similar stack traces:

FATAL UNHANDLED EXCEPTION: signal 11 hit while handling a previously hit signal. The server cannot continue and will shut down.

  The ASE server ends up with detecting a stack overflow and a stack guardword corruption, and it crashes.

  • The terminated user process was attempting to run the following SQL:

DECLARE      @client                 Nvarchar(100)
SET @client = 'xxxxx'
Declare @sql Nvarchar(3000)
Set  @sql = '
CREATE OR REPLACE PROCEDURE dbo.procname _' + @client  + '
( @my_id       INT

AS' +

+ '
….. ‘ 

  • ** SAP's repro on Linux shows that the user process is terminated cleanly. No zombie tasks are left behind and ASE does not crash.



SAP Adaptive Server Enterprise (ASE) 16.0


SAP Adaptive Server Enterprise 16.0


CR823126, CR#823126, 823126, SEGV, segmentation, storage, access, violation, fault, segfault, kisignal, stacktrace,  registers, literal, autoparam, literal_autoparam , KBA , kill query , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed

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