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2437594 - Server may hang up at the time of shut-down - SAP ASE

Symptom

  • ASE runs with multiple engines in threaded kernel mode.
  • When shutting down ASE by either shutdown or shutdown with nowait command, ASE shows the following messages and hangs up.

server  Shutdown started by user 'sa'. SQL text: shutdown
kernel  XP Server stopped successfully.
server  ASE shutdown by request.
kernel  ueshutdown: exiting
kernel  Main thread performing final shutdown.
kernel  Unable to insert task into scheduler as the scheduler has already shutdown.
kernel  Warning: The internal timer is not progressing. If this message is generated multiple times, report to Sybase Technical Support and restart the server (alarminterval=-xxx).

  • Running an OS command such as pstack to get a stack trace against the hanging ASE process may show the following output.

pollsys
poll
ktpDeleteThreadPool
utpmPrepareShutdown
kserver_shutdown
kistartup
c_main

  • Prior to this problem occurring, ASE always shows the following messages during start-up.

kernel  Thread n (LWP n) of Threadpool syb_default_pool online as engine n
kernel  Cannot allocate shared memory as 'max memory' limit of 'nnnnnnn' pages has been reached. Please increase configuration parameter 'max memory' to allow additional shared memory allocation. Total physical memory allocated so far 'nnnnnnn' pages.
kernel  No memory for Network Buffers bucket pool growth (nnnnnnn bytes)
kernel  ks_falloc: Cannot allocate using ubfalloc(rnetmempool, nnnn).
kernel  Initialization of RSA algorithm for network password encryption failed, algorithm is not available for password encryption.


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Environment

SAP Adaptive Server Enterprise (ASE) 15.7

Product

SAP Adaptive Server Enterprise 15.7

Keywords

shutdown hang up , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem

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