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2617724 - Timeslice in ubfshrink() with server crash due to holding SSQLCACHE_SPIN - SAP ASE

Symptom

  • ASE errorlog reports timeslice errors in the module ubfshrink() with stack traces:

timeslice -1001, current process infected at 0x161b7e2 (ubfshrink+0xb5)

  • Stack traces include the following functions:

(null)
ssql__rmplans
ssql_save_SQL
sqt_put_in_stmtcache
s_compile

  Note: A sample stack trace is available under Attachments.

  • As the spid is holding spinlock (SSQLCACHE_SPIN), ASE crashes:

Spinlocks held by kpid 12345678
Spinlock SSQLCACHE_SPIN at address 0x0000000144846100 owned by 731710040


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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

CR802761, CR#802761, 802761, CR802811, CR#802811, 802811, dynamic, statement , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , BC-SYB-ASE-CE , ASE Cluster Edition (Standalone) , Bug Filed

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