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/**
* Tests that data is consistent after a failover, clean, or unclean shutdown occurs in the middle
* of a batched delete.
* @tags: [
* # TODO (SERVER-55909): make WUOW 'groupOplogEntries' the only mode of operation.
* does_not_support_transactions,
* exclude_from_large_txns,
* requires_replication,
* requires_fcv_61
* ]
*/
(function() {
"use strict";
load("jstests/libs/collection_drop_recreate.js"); // For 'assertDropCollection()'
load("jstests/libs/fail_point_util.js"); // For 'configureFailPoint()'
load("jstests/libs/parallelTester.js"); // For 'startParallelShell()'
load('jstests/libs/parallel_shell_helpers.js'); // For 'funWithArgs()'
Random.setRandomSeed();
function stepUpNewPrimary(replSet) {
jsTestLog(`Stepping up new primary`);
let originalPrimary = replSet.getPrimary();
let secondaries = replSet.getSecondaries();
// The test relies on the batched delete failing to commit on the primary. The original primary
// must step down to ensure the batched delete cannot succeed. Additionally, if the original
// primary doesn't step down, the 'batchedDeleteStageSleepAfterNDocuments' failpoint will never
// get cancelled and the test will hang.
assert.soon(() => {
const newPrimaryIdx = Random.randInt(secondaries.length);
const newPrimary = secondaries[newPrimaryIdx];
let res;
try {
res = newPrimary.adminCommand({replSetStepUp: 1});
} catch (e) {
if (!isNetworkError(e)) {
throw e;
}
jsTest.log(
`Got a network error ${tojson(e)} while` +
` attempting to step up secondary ${newPrimary.host}. This is likely due to` +
` the secondary previously having transitioned through ROLLBACK and closing` +
` its user connections. Will retry stepping up the same secondary again`);
res = newPrimary.adminCommand({replSetStepUp: 1});
}
if (res.ok === 1) {
replSet.awaitNodesAgreeOnPrimary();
assert.eq(newPrimary, replSet.getPrimary());
return true;
}
jsTest.log(`Failed to step up secondary ${newPrimary.host} and` +
` got error ${tojson(res)}. Will retry until one of the secondaries step up`);
return false;
});
}
function killAndRestartPrimaryOnShard(replSet) {
jsTestLog(`Killing and restarting primary`);
const originalPrimaryConn = replSet.getPrimary();
const SIGKILL = 9;
const opts = {allowedExitCode: MongoRunner.EXIT_SIGKILL};
replSet.restart(originalPrimaryConn, opts, SIGKILL);
replSet.awaitNodesAgreeOnPrimary();
}
function shutdownAndRestartPrimary(replSet) {
jsTestLog(`Shutting down and restarting primary`);
const originalPrimaryConn = replSet.getPrimary();
const SIGTERM = 15;
replSet.restart(originalPrimaryConn, {}, SIGTERM);
replSet.awaitNodesAgreeOnPrimary();
}
function getCollection(rst, dbName, collName) {
return rst.getPrimary().getDB(dbName).getCollection(collName);
}
const rst = new ReplSetTest({
nodes: 3,
});
const nodes = rst.startSet();
rst.initiate();
rst.awaitNodesAgreeOnPrimary();
const dbName = "test";
const collName = "collHangBatchedDelete";
function runTest(failoverFn, clustered, expectNetworkErrorOnDelete) {
let primary = rst.getPrimary();
let testDB = primary.getDB(dbName);
let coll = testDB.getCollection(collName);
const ns = coll.getFullName();
assertDropCollection(testDB, collName);
if (clustered) {
assert.commandWorked(
testDB.createCollection(collName, {clusteredIndex: {key: {_id: 1}, unique: true}}));
}
const collCount = 5032; // Intentionally not a multiple of the default batch size.
const docs = [...Array(collCount).keys()].map(x => ({_id: x, a: "a".repeat(1024), b: 2 * x}));
assert.commandWorked(coll.insertMany(docs, {ordered: false}));
// Create secondary indexes.
assert.commandWorked(coll.createIndex({a: 1, b: -1}));
assert.commandWorked(coll.createIndex({_id: 1, a: 1}));
assert.commandWorked(coll.createIndex({b: 1}));
const hangAfterApproxNDocs = Random.randInt(collCount);
jsTestLog(`About to hang batched delete after evaluating approximately ${
hangAfterApproxNDocs} documents`);
// When the delete fails, the failpoint will automatically unpause. If the connection is killed,
// it is unsafe to try and disable the failpoint tied to testDB's original connection.
const fp = configureFailPoint(
testDB,
"batchedDeleteStageSleepAfterNDocuments",
{nDocs: hangAfterApproxNDocs, ns: coll.getFullName(), sleepMs: 60 * 60 * 1000});
const awaitDeleteFails = startParallelShell(
funWithArgs((dbName, collName, expectNetworkErrorOnDelete) => {
const testDB = db.getSiblingDB(dbName);
const coll = testDB.getCollection(collName);
try {
assert.commandFailed(testDB.runCommand(
{delete: collName, deletes: [{q: {_id: {$gte: 0}}, limit: 0}]}));
} catch (e) {
if (!isNetworkError(e) || !expectNetworkErrorOnDelete) {
// On unclean shutdown, expect a network error.
throw e;
}
}
}, dbName, collName, expectNetworkErrorOnDelete), primary.port);
fp.wait();
failoverFn(rst);
awaitDeleteFails();
rst.awaitReplication();
coll = getCollection(rst, dbName, collName);
const docsDeleted = collCount - coll.count();
assert.lte(docsDeleted, hangAfterApproxNDocs);
rst.checkReplicatedDataHashes();
}
function runTestSet(clustered) {
jsTestLog(`Running set of tests - collections clustered? ${clustered ? "true" : "false"}`);
runTest(stepUpNewPrimary, clustered, false /* expectNetworkErrorOnDelete */);
runTest(killAndRestartPrimaryOnShard, clustered, true /* expectNetworkErrorOnDelete */);
runTest(shutdownAndRestartPrimary, clustered, false /* expectNetworkErrorOnDelete */);
}
runTestSet(false);
runTestSet(true);
rst.stopSet();
})();
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