SAP Knowledge Base Article - Preview

2636316 - Signal 11 in mem__pageallocate_this_engine() when using the hashbytes() built-in function with the MD5 algorithm - SAP ASE

Symptom

  • Memory corruption in the procedure cache memory pool or engine local cache.
     
  • A connection unexpectedly terminates and the errorlog contains a signal 11 error in the routine mem__pageallocate_this_engine() together with a stacktrace:

Current process (0x290015) infected with signal 11 (SIGSEGV)
Address 0x0x0000000001d2c2d2 (mem__pageallocate_this_engine+0x342), siginfo (code, address) = (1, 0x0x0000004887140008)

  • The stacktrace includes functions: 

mem__pageallocate_this_engine
mem_pageallocate)                 
mem_getpages
memalloc
hashbifs_md5_lerun

  Note: A complete stack trace is available under Attachments.

  • The errorlog may also include messages which start with ELC_VALIDATION_ERROR.
     
  • The ASE may also shutdown after a message saying it was holding Spinlock eresourcep->erprocelc_spin, for example:

Spinlocks held by  kpid 2686997
Spinlock eresourcep->erprocelc_spin at address 0x00000001451b7880 owned by 2686997

  • Built-in function hashbytes() with algorithm MD5 is used.  Some examples:
    • use  the replication utility rs_subcmd with FACTCMP='Y'
    • select hashbytes('md5', ......)
       
  • ASE version is between 16.0 SP03 and 16.0 SP03 PL04.


Read more...

Environment

  • SAP Adaptive Server Enterprise (ASE) 15.7
  • SAP Adaptive Server Enterprise (ASE) Cluster Edition (CE) 15.7
  • SAP Adaptive Server Enterprise (ASE) Cluster Edition (CE) 16.0
  • SAP Adaptive Server Enterprise (ASE) 16.0 SP03 - 16.0 SP03 PL04

Product

SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 15.7 Cluster Edition ; SAP Adaptive Server Enterprise 16.0 ; SAP Adaptive Server Enterprise 16.0 Cluster Edition ; Sybase Adaptive Server Enterprise Cluster Edition 15.7

Keywords

CR814837, CR#814198, 814198, SEGV, segmentation, storage, access, violation, fault, segfault, kisignal, stacktrace,  stack, registers , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , BC-SYB-ASE-CE , ASE Cluster Edition (Standalone) , Bug Filed

About this page

This is a preview of a SAP Knowledge Base Article. Click more to access the full version on SAP ONE Support launchpad (Login required).

Search for additional results

Visit SAP Support Portal's SAP Notes and KBA Search.