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#!/usr/bin/env python
#
# Public Domain 2014-2020 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_txn22.py
# Transactions: test salvage with removed
import fnmatch, os, shutil, time
from wtscenario import make_scenarios
from suite_subprocess import suite_subprocess
import wiredtiger, wttest
def copy_for_crash_restart(olddir, newdir):
''' Simulate a crash from olddir and restart in newdir. '''
# with the connection still open, copy files to new directory
shutil.rmtree(newdir, ignore_errors=True)
os.mkdir(newdir)
for fname in os.listdir(olddir):
fullname = os.path.join(olddir, fname)
# Skip lock file on Windows since it is locked
if os.path.isfile(fullname) and \
"WiredTiger.lock" not in fullname and \
"Tmplog" not in fullname and \
"Preplog" not in fullname:
shutil.copy(fullname, newdir)
class test_txn22(wttest.WiredTigerTestCase, suite_subprocess):
base_config = 'cache_size=1GB'
conn_config = base_config
# File to be corrupted
filename_scenarios = [
('WiredTiger', dict(filename='WiredTiger')),
('WiredTiger.basecfg', dict(filename='WiredTiger.basecfg')),
('WiredTiger.turtle', dict(filename='WiredTiger.turtle')),
('WiredTiger.wt', dict(filename='WiredTiger.wt')),
('WiredTigerHS.wt', dict(filename='WiredTigerHS.wt')),
('test_txn22.wt', dict(filename='test_txn22.wt')),
]
# In many cases, wiredtiger_open without any salvage options will
# just work. We list those cases here.
openable = [
"removal:WiredTiger.basecfg",
"removal:WiredTiger.turtle",
]
# The cases for which salvage will not work
not_salvageable = [
"removal:WiredTiger.turtle",
"removal:WiredTiger.wt",
]
scenarios = make_scenarios(filename_scenarios)
uri = 'table:test_txn22'
create_params = 'key_format=i,value_format=S'
nrecords = 1000 # records per table.
def valuegen(self, i):
return str(i) + 'A' * 1024
# Insert a list of keys
def inserts(self, keylist):
c = self.session.open_cursor(self.uri)
for i in keylist:
c[i] = self.valuegen(i)
c.close()
def checks(self):
c = self.session.open_cursor(self.uri)
gotlist = []
for key, value in c:
gotlist.append(key)
self.assertEqual(self.valuegen(key), value)
c.close()
def corrupt_meta(self, homedir):
# Mark this test has having corrupted files
self.databaseCorrupted()
filename = os.path.join(homedir, self.filename)
os.remove(filename)
def is_openable(self):
key = 'removal:' + self.filename
return key in self.openable
def is_salvageable(self):
key = 'removal:' + self.filename
return key not in self.not_salvageable
def test_corrupt_meta(self):
newdir = "RESTART"
newdir2 = "RESTART2"
expect = list(range(0, self.nrecords))
salvage_config = self.base_config + ',salvage=true'
self.session.create(self.uri, self.create_params)
self.inserts(expect)
# Simulate a crash by copying the contents of the directory
# before closing. After we corrupt the copy, make another
# copy of the corrupted directory.
#
# The first corrupted copy will be used to run:
# wiredtiger_open without salvage flag, followed by:
# wiredtiger_open with salvage flag.
# The second directory will be used to run:
# wiredtiger_open with salvage flag first.
copy_for_crash_restart(self.home, newdir)
self.close_conn()
self.corrupt_meta(newdir)
copy_for_crash_restart(newdir, newdir2)
for salvagedir in [ newdir, newdir2 ]:
# Removing the 'WiredTiger.turtle' file has weird behavior:
# Immediately doing wiredtiger_open (without salvage) succeeds.
# Following that, wiredtiger_open w/ salvage also succeeds.
#
# But, immediately after the corruption, if we run
# wiredtiger_open with salvage, it will fail.
# This anomoly should be fixed or explained.
if self.filename == 'WiredTiger.turtle':
continue
if self.is_salvageable():
if self.filename == 'WiredTigerHS.wt':
# Without salvage, they result in an error during the wiredtiger_open.
# But the nature of the messages produced during the error is variable
# by which case it is, and even variable from system to system.
with self.expectedStdoutPattern('.'):
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda: self.reopen_conn(salvagedir, self.base_config),
'/.*/')
self.reopen_conn(salvagedir, salvage_config)
if self.filename == 'test_txn22':
self.checks()
else:
# Certain cases are not currently salvageable, they result in
# an error during the wiredtiger_open. But the nature of the
# messages produced during the error is variable by which case
# it is, and even variable from system to system.
with self.expectedStdoutPattern('.'):
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda: self.reopen_conn(salvagedir, salvage_config),
'/.*/')
# The test may output the following error message while opening a file that
# does not exist. Ignore that.
self.ignoreStderrPatternIfExists('No such file or directory')
if __name__ == '__main__':
wttest.run()
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