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2321379 - Signal 11 at address ct__tds_dynres_undo - SAP ASE

Symptom

  • ASE errorlog reports signal 11 at address ct__tds_dynres_undo
    • when having a remote (CIS) connection or
    • when executing a dynamic prepare statement
  • ASE in Process mode can shutdown as a result as the scheduler is affected

The errorlog in Process mode will show entries including

Current process (0x0) infected with signal 11 (SIGSEGV)
Address 0x0x0000000001ded156 (ct__tds_dynres_undo+0x16)
...
kechkfault: engine #: scheduler infected with signal 11 (SIGSEGV)
...
ueshutdown: exiting

with a stack including some or most of these modules:

ct__tds_dynres_undo
ct__tds_rd_done
ct__tds_read_token
ct__tds_resproc
ct_async_exec_stack
ct_poll

tdsrecv__dynexec_xoltp
tdsrecv__dynexec
tdsrecv_dynamic

  • ASE in Threaded mode may not shutdown but appear hung - no new logins or remote connections are possible. Reboot ASE.

The errorlog in Threaded mode may show

Current process (0x0) infected with signal 11 (SIGSEGV)
Address 0x0x0000000001ded156 (ct__tds_dynres_undo+0x16)

and one of these stacks including some or most of these modules:

ct__tds_dynres_undo
ct__tds_read_token
ct__tds_resproc
ct_async_exec_stack
ct_async_iopost
np__io_fillbuf_cb
sybnet__do_poll
sybnet__async_poll
thread_create_handler
Run to completion task 'CtlibController' exiting.

ct__tds_migresume_clear
ct__api_rp_clear
ct__50cont_results
ct_async_exec_stack
ct_async_iopost
np__io_fillbuf_cb
sybnet__async_poll
Run to completion task 'CtlibController' exiting.

 
ct__tds_resproc
ct_async_exec_stack
ct_async_iopost
np__io_fillbuf_cb
sybnet__async_poll
Run to completion task 'CtlibController' exiting.


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Environment

  • SAP Adaptive Server Enterprise (ASE) 15.7 SP136 & SP137
  • SAP Adaptive Server Enterprise (ASE0 16.0 SP02 PL0x

Product

SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 16.0 ; SAP Adaptive Server Enterprise SDK 16.0 ; SAP Replication Server all versions ; Sybase Software Developer Kit 15.7

Keywords

CR#79379, CR793749, 793749 , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed

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