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/**
* Tests that --repair on WiredTiger correctly and gracefully handles missing data files and
* directories.
*
* @tags: [requires_wiredtiger]
*/
(function() {
load('jstests/disk/libs/wt_file_helper.js');
const baseName = "wt_repair_missing_files";
const collName = "test";
const dbpath = MongoRunner.dataPath + baseName + "/";
resetDbpath(dbpath);
/**
* Test 1. Create a collection, delete it's .wt file, run repair. Verify that repair succeeds at
* re-creating it. The collection should be visible on normal startup.
*/
let mongod = startMongodOnExistingPath(dbpath);
let testColl = mongod.getDB(baseName)[collName];
const doc = {a: 1};
assert.commandWorked(testColl.insert(doc));
let testCollUri = getUriForColl(testColl);
let testCollFile = dbpath + testCollUri + ".wt";
MongoRunner.stopMongod(mongod);
jsTestLog("deleting collection file: " + testCollFile);
removeFile(testCollFile);
assertRepairSucceeds(dbpath, mongod.port);
mongod = startMongodOnExistingPath(dbpath);
testColl = mongod.getDB(baseName)[collName];
assert.eq(testCollUri, getUriForColl(testColl));
assert.eq(testColl.find({}).itcount(), 0);
assert.eq(testColl.count(), 0);
/**
* Test 2. Delete an index file. Verify that repair rebuilds and allows MongoDB to start up
* normally.
*/
assert.commandWorked(testColl.insert(doc));
const indexName = "a_1";
assert.commandWorked(testColl.createIndex({a: 1}, {name: indexName}));
assertQueryUsesIndex(testColl, doc, indexName);
let indexUri = getUriForIndex(testColl, indexName);
MongoRunner.stopMongod(mongod);
let indexFile = dbpath + indexUri + ".wt";
jsTestLog("deleting index file: " + indexFile);
removeFile(indexFile);
assertRepairSucceeds(dbpath, mongod.port);
mongod = startMongodOnExistingPath(dbpath);
testColl = mongod.getDB(baseName)[collName];
// Repair creates new idents.
assert.neq(indexUri, getUriForIndex(testColl, indexName));
assertQueryUsesIndex(testColl, doc, indexName);
assert.eq(testColl.find(doc).itcount(), 1);
assert.eq(testColl.count(), 1);
MongoRunner.stopMongod(mongod);
/**
* Test 3. Delete the sizeStorer. Verify that repair suceeds in recreating it.
*/
let sizeStorerFile = dbpath + "sizeStorer.wt";
jsTestLog("deleting size storer file: " + sizeStorerFile);
removeFile(sizeStorerFile);
assertRepairSucceeds(dbpath, mongod.port);
mongod = startMongodOnExistingPath(dbpath);
testColl = mongod.getDB(baseName)[collName];
assert.eq(testColl.find(doc).itcount(), 1);
assert.eq(testColl.count(), 1);
MongoRunner.stopMongod(mongod);
/**
* Test 4. Delete the _mdb_catalog. Verify that repair suceeds in creating an empty catalog and
* MongoDB starts up normally with no data.
*/
let mdbCatalogFile = dbpath + "_mdb_catalog.wt";
jsTestLog("deleting catalog file: " + mdbCatalogFile);
removeFile(mdbCatalogFile);
assertRepairSucceeds(dbpath, mongod.port);
mongod = startMongodOnExistingPath(dbpath);
testColl = mongod.getDB(baseName)[collName];
assert.isnull(testColl.exists());
assert.eq(testColl.find(doc).itcount(), 0);
assert.eq(testColl.count(), 0);
/**
* Test 5. Verify that using repair with --directoryperdb creates a missing directory and its
* files, allowing MongoDB to start up normally.
*/
MongoRunner.stopMongod(mongod);
resetDbpath(dbpath);
mongod = startMongodOnExistingPath(dbpath, {directoryperdb: ""});
testColl = mongod.getDB(baseName)[collName];
assert.commandWorked(testColl.insert(doc));
testCollUri = getUriForColl(testColl);
MongoRunner.stopMongod(mongod);
let dataDir = dbpath + baseName;
jsTestLog("deleting data directory: " + dataDir);
removeFile(dataDir);
assertRepairSucceeds(dbpath, mongod.port, {directoryperdb: ""});
mongod = startMongodOnExistingPath(dbpath, {directoryperdb: ""});
testColl = mongod.getDB(baseName)[collName];
assert.eq(testCollUri, getUriForColl(testColl));
assert.eq(testColl.find({}).itcount(), 0);
assert.eq(testColl.count(), 0);
MongoRunner.stopMongod(mongod);
})();
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