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#!/usr/bin/env python
#
# Public Domain 2014-present MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
#
# In jurisdictions that recognize copyright laws, the author or authors
# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
import wiredtiger, wttest
# test_debug_mode01.py
# Test the debug mode settings. Test rollback_error in this one.
class test_debug_mode01(wttest.WiredTigerTestCase):
conn_config = 'log=(enabled=true),debug_mode=(rollback_error=5)'
session_config = 'isolation=snapshot'
uri = 'file:test_debug'
entries = 22
min_error = entries // 5
def rollback_error(self, val, insert=True):
keys = range(1, self.entries)
c = self.session.open_cursor(self.uri, None)
# We expect some operations to return an exception so we cannot
# use the simple 'c[k] = 1'. But we must explicitly set the key
# and value and then use the insert or update primitives.
#
# Look for a generic 'WT_ROLLBACK' string not the specific
# simulated reason string.
msg = '/WT_ROLLBACK/'
rollback = 0
for k in keys:
self.session.begin_transaction()
c.set_key(k)
c.set_value(val)
# Execute the insert or update. It will return true if the simulated
# conflict exception is raised, false if no exception occurred.
if insert:
conflict = self.assertRaisesException(wiredtiger.WiredTigerError, \
lambda:c.insert(), msg, True)
else:
conflict = self.assertRaisesException(wiredtiger.WiredTigerError, \
lambda:c.update(), msg, True)
if conflict:
rollback += 1
self.pr("Key: " + str(k) + " Rolled back")
self.session.rollback_transaction()
else:
self.session.commit_transaction()
c.close()
return rollback
def test_rollback_error(self):
self.session.create(self.uri, 'key_format=i,value_format=i')
rollback = self.rollback_error(1)
rollback += self.rollback_error(2, False)
self.pr("Rollback: " + str(rollback))
self.pr("Minimum: " + str(self.min_error))
self.assertTrue(rollback >= self.min_error)
def test_rollback_error_off(self):
# The setting is added in to wiredtiger_open via the config above.
# Test that we can properly turn the setting off via reconfigure.
# There should then be no rollback errors.
self.conn.reconfigure("debug_mode=(rollback_error=0)")
self.session.create(self.uri, 'key_format=i,value_format=i')
rollback = self.rollback_error(1)
rollback += self.rollback_error(2)
self.assertTrue(rollback == 0)
if __name__ == '__main__':
wttest.run()
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