#16745: Random OperationalError: disk I/O error
---------------------------------+-------------------------------
   Reporter:  vbraun             |            Owner:
       Type:  defect             |           Status:  new
   Priority:  major              |        Milestone:  sage-6.3
  Component:  doctest framework  |         Keywords:  random_fail
  Merged in:                     |          Authors:
  Reviewers:                     |  Report Upstream:  N/A
Work issues:                     |           Branch:
     Commit:                     |     Dependencies:
   Stopgaps:                     |
---------------------------------+-------------------------------
 I see this occasionally on different buildbots, so it is not a hardware
 problem. Looks like a race with the IPython sqlite history database.
 {{{
 sage: sig_on_count() ## line 923 ##
 0
 sage: ascii_art(tuple(DyckWords(3))) ## line 933 ##
 (                                   /\   )
 (            /\    /\      /\/\    /  \  )
 ( /\/\/\, /\/  \, /  \/\, /    \, /    \ )
 sage: sig_on_count() ## line 937 ##
 0

 **********************************************************************
 Traceback (most recent call last):
   File "/Users/buildslave-sage/slave/sage_git/build/local/lib/python2.7
 /site-packages/sage/doctest/forker.py", line 2117, in __call__
     atexit._run_exitfuncs()
   File "/Users/buildslave-
 sage/slave/sage_git/build/local/lib/python/atexit.py", line 24, in
 _run_exitfuncs
     func(*targs, **kargs)
   File "/Users/buildslave-sage/slave/sage_git/build/local/lib/python2.7
 /site-packages/IPython/core/interactiveshell.py", line 3189, in
 atexit_operations
     self.history_manager.end_session()
   File "/Users/buildslave-sage/slave/sage_git/build/local/lib/python2.7
 /site-packages/IPython/core/history.py", line 525, in end_session
     len(self.input_hist_parsed)-1, self.session_number))
 OperationalError: disk I/O error
 }}}

--
Ticket URL: <http://trac.sagemath.org/ticket/16745>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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