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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 threading, time
+from helper import simulate_crash_restart
+from test_rollback_to_stable01 import test_rollback_to_stable_base
+from wiredtiger import stat
+from wtdataset import SimpleDataSet
+from wtscenario import make_scenarios
+from wtthread import checkpoint_thread
+
+# test_prepare21.py
+# Test prepare rollback doesn't crash because of triggering out of order fix.
+class test_prepare21(test_rollback_to_stable_base):
+
+ format_values = [
+ ('column', dict(key_format='r', value_format='S')),
+ ('column_fix', dict(key_format='r', value_format='8t')),
+ ('row_integer', dict(key_format='i', value_format='S')),
+ ]
+
+ scenarios = make_scenarios(format_values)
+
+ def conn_config(self):
+ config = 'cache_size=10MB,statistics=(all),timing_stress_for_test=[history_store_checkpoint_delay]'
+ return config
+
+ def evict_cursor(self, uri, nrows):
+ # Configure debug behavior on a cursor to evict the page positioned on when the reset API is used.
+ evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
+ self.session.begin_transaction("ignore_prepare=true")
+ for i in range (1, nrows + 1):
+ evict_cursor.set_key(i)
+ evict_cursor.search()
+ evict_cursor.reset()
+ evict_cursor.close()
+ self.session.rollback_transaction()
+
+ def test_prepare_rollback(self):
+ nrows = 10
+
+ # Create a table.
+ uri = "table:prepare21"
+ ds = SimpleDataSet(self, uri, 0, key_format=self.key_format, value_format=self.value_format)
+ ds.populate()
+
+ if self.value_format == '8t':
+ value_a = 97
+ value_b = 98
+ value_c = 99
+ value_d = 100
+ else:
+ value_a = "aaaaa" * 100
+ value_b = "bbbbb" * 100
+ value_c = "ccccc" * 100
+ value_d = "ddddd" * 100
+
+ # Pin oldest and stable to timestamp 10.
+ self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(10) +
+ ',stable_timestamp=' + self.timestamp_str(10))
+
+ self.large_updates(uri, value_a, ds, nrows, False, 20)
+ self.large_updates(uri, value_b, ds, nrows, False, 30)
+ self.large_removes(uri, ds, nrows, False, 40)
+
+ prepare_session = self.conn.open_session()
+ prepare_session.begin_transaction()
+ cursor = prepare_session.open_cursor(uri)
+ for i in range (1, nrows + 1):
+ cursor[i] = value_c
+ cursor.close()
+ prepare_session.prepare_transaction('prepare_timestamp=' + self.timestamp_str(50))
+
+ # Verify data is visible and correct.
+ self.check(value_a, uri, nrows, None, 20)
+ self.check(value_b, uri, nrows, None, 30)
+
+ self.evict_cursor(uri, nrows)
+
+ # Pin stable to timestamp 40.
+ self.conn.set_timestamp('stable_timestamp=' + self.timestamp_str(40))
+
+ # Rollback the prepared update
+ prepare_session.rollback_transaction()
+ self.large_updates(uri, value_d, ds, nrows, False, 60)
+
+ done = threading.Event()
+ ckpt = checkpoint_thread(self.conn, done)
+ try:
+ ckpt.start()
+
+ # Wait for checkpoint to start before committing last transaction.
+ ckpt_started = 0
+ while not ckpt_started:
+ stat_cursor = self.session.open_cursor('statistics:', None, None)
+ ckpt_started = stat_cursor[stat.conn.txn_checkpoint_running][2]
+ stat_cursor.close()
+
+ self.evict_cursor(uri, nrows)
+ finally:
+ done.set()
+ ckpt.join()
+
+ # Verify data is visible and correct.
+ self.check(value_a, uri, nrows, None, 20)
+ self.check(value_b, uri, nrows, None, 30)
+ self.check(value_d, uri, nrows, None, 60)
+
+if __name__ == '__main__':
+ wttest.run()