Add a test case for checkpoint consistency.

We recently fixed a bug where updating a page after the write leaves
phase of a checkpoint had completed, then either checkpointed again or
closed the database. We would end up with inconsistent data. That was the
case because we weren't marking trees dirty all the time.

This test case reproduces the scenario so we don't reintroduce the failure.

Refs #1735 SUPPORT-1248, SERVER-17506

1 files changed, 103 insertions, 0 deletions

diff --git a/test/suite/test_bug010.py b/test/suite/test_bug010.py
new file mode 100644
index 00000000000..31e9777aa8e
--- /dev/null
+++ b/test/suite/test_bug010.py
@@ -0,0 +1,103 @@
+#!/usr/bin/env python
+#
+# Public Domain 2014-2015 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.
+#
+# test_bug010.py
+#       check that checkpoints don't leave files marked clean when they
+#       did not write all updates out.
+#
+
+import wiredtiger, wttest, wtthread
+import threading, time
+
+class test_bug010(wttest.WiredTigerTestCase):
+    name = 'test_bug010'
+    uri = 'table:' + name
+    num_tables = 1000
+
+    # Overrides WiredTigerTestCase
+    def setUpConnectionOpen(self, dir):
+        self.home = dir
+        # Disable checkpoint sync, to make checkpoints faster and
+        # increase the likelyhood of triggering the symptom
+        conn_params = ',create,checkpoint_sync=false'
+        conn = wiredtiger.wiredtiger_open(dir, conn_params)
+        return conn
+
+    def test_checkpoint_dirty(self):
+        # Create a lot of tables 
+        # insert the same item in each
+        # Start a checkpoint with some of the updates
+        # Create another checkpoint that should contain all data consistently
+        # Read from the checkpoint and make sure the data is consistent
+        for i in range(0, self.num_tables):
+            self.printVerbose(3, 'Creating table ' + str(i))
+            self.session.create(self.uri + str(i),
+            'key_format=S,value_format=i')
+            c = self.session.open_cursor(self.uri + str(i), None)
+            c.set_key('a')
+            c.set_value(0)
+            c.insert()
+            c.close()
+
+        self.session.checkpoint()
+
+        iterations = 1
+        expected_val = 0
+        for its in range(1, 10):
+            self.printVerbose(3, 'Doing iteration ' + str(its))
+
+            # Create a checkpoint thread
+            done = threading.Event()
+            ckpt = wtthread.checkpoint_thread(self.conn, done)
+            ckpt.start()
+            try:
+                expected_val += 1
+                for i in range(0, self.num_tables):
+                    c = self.session.open_cursor(self.uri + str(i), None)
+                    c.set_key('a')
+                    c.set_value(expected_val)
+                    c.insert()
+                    c.close()
+            finally:
+                done.set()
+                ckpt.join()
+
+            # Execute another checkpoint, to make sure we have a consistent
+            # view of the data.
+            self.session.checkpoint()
+            for i in range(0, self.num_tables):
+                c = self.session.open_cursor(
+                    self.uri + str(i), None, 'checkpoint=WiredTigerCheckpoint')
+                c.next()
+                self.assertEquals(c.get_value(), expected_val,
+                    msg='Mismatch on iteration ' + str(its) +\
+					' for table ' + str(i))
+                c.close()
+
+if __name__ == '__main__':
+    wttest.run()