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/**
* Test to ensure that rollback waits for in-progress background index builds to finish before
* starting the rollback process. Only applies to Recoverable Rollback via WiredTiger checkpoints.
*
* @tags: [
* requires_wiredtiger,
* requires_journaling,
* requires_majority_read_concern,
* ]
*/
(function() {
'use strict';
load('jstests/noPassthrough/libs/index_build.js');
load("jstests/replsets/rslib.js");
load('jstests/replsets/libs/rollback_test.js');
let bgIndexThread;
const dbName = "dbWithBgIndex";
const collName = "coll";
/**
* Operations that will get replicated to both replica set nodes before rollback.
*
* These common operations are run against the node that will eventually go into rollback, so
* the failpoints will only be enabled on the rollback node.
*/
function CommonOps(node) {
// Create a collection on both data bearing nodes, so we can create an index on it.
const testDB = node.getDB(dbName);
assert.commandWorked(testDB.createCollection(collName));
// Insert document into collection to avoid optimization for index creation on an empty
// collection. This allows us to pause index builds on the collection using a fail point.
const testColl = testDB.getCollection(collName);
assert.commandWorked(testColl.insert({a: 1}));
// Pause all index builds.
IndexBuildTest.pauseIndexBuilds(node);
jsTestLog("Starting background index build in parallel shell.");
bgIndexThread = IndexBuildTest.startIndexBuild(node, testColl.getFullName(), {x: 1});
jsTestLog("Waiting for background index build to start.");
IndexBuildTest.waitForIndexBuildToStart(testDB, collName, "x_1");
}
const replTest = new ReplSetTest({
name: jsTestName(),
nodes: 3,
useBridge: true,
});
replTest.startSet();
let config = replTest.getReplSetConfig();
config.members[2].priority = 0;
config.settings = {
chainingAllowed: false
};
replTest.initiateWithHighElectionTimeout(config);
const rollbackTest = new RollbackTest(jsTestName(), replTest);
const originalPrimary = rollbackTest.getPrimary();
const testDB = originalPrimary.getDB(dbName);
CommonOps(originalPrimary);
// Insert a document so that there is an operation to rollback.
const rollbackNode = rollbackTest.transitionToRollbackOperations();
assert.commandWorked(rollbackNode.getDB(dbName)["rollbackColl"].insert({x: 1}));
// Allow rollback to start. There are no sync source ops.
rollbackTest.transitionToSyncSourceOperationsBeforeRollback();
rollbackTest.transitionToSyncSourceOperationsDuringRollback();
// Make sure that rollback is hung waiting for the background index operation to complete.
jsTestLog("Waiting for rollback to block on the background index build completion.");
let msg1 = "Waiting for all background operations to complete before starting rollback";
checkLog.contains(rollbackNode, msg1);
jsTestLog("Resuming index builds on the original primary.");
reconnect(originalPrimary);
IndexBuildTest.resumeIndexBuilds(originalPrimary);
// Make sure the background index build completed before rollback started.
checkLog.contains(rollbackNode,
"Finished waiting for background operations to complete before rollback");
// Wait for rollback to finish.
rollbackTest.transitionToSteadyStateOperations();
// Ensure index build is not running.
IndexBuildTest.waitForIndexBuildToStop(testDB, collName, "x_1");
// Check the replica set.
rollbackTest.stop();
}());
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