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/*
* Test that the server is able to roll back a 'dropDatabase' entry correctly. This test creates
* a collection, then executes a 'dropDatabase' command, partitioning the primary such that the
* final 'dropDatabase' oplog entry is not replicated. The test then forces rollback of that entry.
*
* The 'dropDatabase' command drops each collection, ensures that the last drop is committed,
* and only then logs a 'dropDatabase' oplog entry. This is therefore the only entry that could
* get rolled back.
*/
(function() {
load("jstests/replsets/libs/rollback_test.js");
load("jstests/libs/check_log.js");
const testName = "rollback_drop_database";
const oldDbName = "oldDatabase";
const newDbName = "newDatabase";
let rollbackTest = new RollbackTest(testName);
let rollbackNode = rollbackTest.getPrimary();
let syncSourceNode = rollbackTest.getSecondary();
// Perform initial insert (common operation).
assert.commandWorked(rollbackNode.getDB(oldDbName)["beforeRollback"].insert({"num": 1}));
// Set a failpoint on the original primary, so that it blocks after it commits the last
// 'dropCollection' entry but before the 'dropDatabase' entry is logged.
assert.commandWorked(rollbackNode.adminCommand(
{configureFailPoint: "dropDatabaseHangBeforeInMemoryDrop", mode: "alwaysOn"}));
// Issue a 'dropDatabase' command.
let dropDatabaseFn = function() {
const rollbackDb = "oldDatabase";
var primary = db.getMongo();
jsTestLog("Dropping database " + rollbackDb + " on primary node " + primary.host);
var dbToDrop = db.getSiblingDB(rollbackDb);
assert.commandWorked(dbToDrop.dropDatabase({w: 1}));
};
let waitForDropDatabaseToFinish = startParallelShell(dropDatabaseFn, rollbackNode.port);
// Ensure that we've hit the failpoint before moving on.
checkLog.contains(rollbackNode,
"dropDatabase - fail point dropDatabaseHangBeforeInMemoryDrop enabled.");
// Wait for the secondary to finish dropping the collection (the last replicated entry).
// We use the default 10-minute timeout for this.
assert.soon(function() {
let res = syncSourceNode.getDB(oldDbName).getCollectionNames().includes("beforeRollback");
return !res;
}, "Sync source did not finish dropping collection beforeRollback", 10 * 60 * 1000);
rollbackTest.transitionToRollbackOperations();
// Allow the final 'dropDatabase' entry to be logged on the now isolated primary.
// This is the rollback node's divergent oplog entry.
assert.commandWorked(rollbackNode.adminCommand(
{configureFailPoint: "dropDatabaseHangBeforeInMemoryDrop", mode: "off"}));
waitForDropDatabaseToFinish();
assert.eq(false, rollbackNode.getDB(oldDbName).getCollectionNames().includes("beforeRollback"));
jsTestLog("Database " + oldDbName + " successfully dropped on primary node " + rollbackNode.host);
rollbackTest.transitionToSyncSourceOperationsBeforeRollback();
// Perform an insert on another database while interfacing with the new primary.
// This is the sync source's divergent oplog entry.
assert.commandWorked(syncSourceNode.getDB(newDbName)["afterRollback"].insert({"num": 2}));
rollbackTest.transitionToSyncSourceOperationsDuringRollback();
rollbackTest.transitionToSteadyStateOperations();
rollbackTest.stop();
})();
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