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// Test checksum validation of journal files.
var testname = "dur_checksum";
var path = MongoRunner.dataPath + testname;
if (0) {
// This is used to create the prototype journal file.
jsTest.log("Just creating prototype journal, not testing anything");
var conn = startMongodEmpty("--port", 30001, "--dbpath", path, "--dur");
var db = conn.getDB("test");
// each insert is in it's own commit.
db.foo.insert({a: 1});
db.runCommand({getlasterror:1, j:1})
db.foo.insert({a: 2});
db.runCommand({getlasterror:1, j:1})
stopMongod(30001, /*signal*/9);
jsTest.log("Journal file left at " + path + "/journal/j._0");
quit();
// A hex editor must be used to replace the checksums of specific journal sections with
// "0BADC0DE 1BADC0DE 2BADC0DE 3BADCD0E"
}
function startMongodWithJournal() {
return startMongodNoReset("--port", 30001,
"--dbpath", path,
"--dur",
"--smallfiles",
"--durOptions", 1 /*DurDumpJournal*/);
}
jsTest.log("Starting with good.journal to make sure everything works");
resetDbpath(path);
mkdir(path + '/journal');
copyFile("jstests/libs/dur_checksum_good.journal", path + "/journal/j._0");
var conn = startMongodWithJournal();
var db = conn.getDB('test');
assert.eq(db.foo.count(), 2);
stopMongod(30001);
// dur_checksum_bad_last.journal is good.journal with the bad checksum on the last section.
jsTest.log("Starting with bad_last.journal");
resetDbpath(path);
mkdir(path + '/journal');
copyFile("jstests/libs/dur_checksum_bad_last.journal", path + "/journal/j._0");
conn = startMongodWithJournal();
var db = conn.getDB('test');
assert.eq(db.foo.count(), 1); // 2nd insert "never happened"
stopMongod(30001);
// dur_checksum_bad_first.journal is good.journal with the bad checksum on the prior section.
// This means there is a good commit after the bad one. We currently ignore this, but a future
// version of the server may be able to detect this case.
jsTest.log("Starting with bad_first.journal");
resetDbpath(path);
mkdir(path + '/journal');
copyFile("jstests/libs/dur_checksum_bad_first.journal", path + "/journal/j._0");
conn = startMongodWithJournal();
var db = conn.getDB('test');
assert.eq(db.foo.count(), 0); // Neither insert happened.
stopMongod(30001);
// If we detect an error in a non-final journal file, that is considered an error.
jsTest.log("Starting with bad_last.journal followed by good.journal");
resetDbpath(path);
mkdir(path + '/journal');
copyFile("jstests/libs/dur_checksum_bad_first.journal", path + "/journal/j._0");
copyFile("jstests/libs/dur_checksum_good.journal", path + "/journal/j._1");
exitCode = runMongoProgram("mongod",
"--port", 30001,
"--dbpath", path,
"--dur",
"--smallfiles",
"--durOptions", 1 /*DurDumpJournal*/
+ 2 /*DurScanOnly*/);
assert.eq(exitCode, 100 /*EXIT_UNCAUGHT*/);
// TODO Possibly we could check the mongod log to verify that the correct type of exception was
// thrown. But that would introduce a dependency on the mongod log format, which we may not want.
jsTest.log("SUCCESS checksum.js");
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