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// Test parsing of readConcern option 'atClusterTime'.
//
// Only run this test with the WiredTiger storage engine, since we expect other storage engines to
// return early because they do not support snapshot read concern.
// @tags: [requires_wiredtiger, uses_transactions, uses_atclustertime]
function _getClusterTime(rst) {
const pingRes = assert.commandWorked(rst.getPrimary().adminCommand({ping: 1}));
assert(pingRes.hasOwnProperty("$clusterTime"), tojson(pingRes));
assert(pingRes.$clusterTime.hasOwnProperty("clusterTime"), tojson(pingRes));
return pingRes.$clusterTime.clusterTime;
}
(function() {
"use strict";
// Skip this test if running with --nojournal and WiredTiger.
if (jsTest.options().noJournal &&
(!jsTest.options().storageEngine || jsTest.options().storageEngine === "wiredTiger")) {
print("Skipping test because running WiredTiger without journaling isn't a valid" +
" replica set configuration");
return;
}
const dbName = "test";
const collName = "coll";
const rst = new ReplSetTest({nodes: 1});
rst.startSet();
rst.initiate();
const testDB = rst.getPrimary().getDB(dbName);
if (!testDB.serverStatus().storageEngine.supportsSnapshotReadConcern) {
rst.stopSet();
return;
}
const session = testDB.getMongo().startSession({causalConsistency: false});
const sessionDb = session.getDatabase(dbName);
const clusterTime = _getClusterTime(rst);
// 'atClusterTime' can be used with readConcern level 'snapshot'.
session.startTransaction({readConcern: {level: "snapshot", atClusterTime: clusterTime}});
assert.commandWorked(sessionDb.runCommand({find: collName}));
assert.commandWorked(session.commitTransaction_forTesting());
// 'atClusterTime' cannot be greater than the current cluster time.
const futureClusterTime = new Timestamp(clusterTime.getTime() + 1000, 1);
session.startTransaction({readConcern: {level: "snapshot", atClusterTime: futureClusterTime}});
assert.commandFailedWithCode(sessionDb.runCommand({find: collName}), ErrorCodes.InvalidOptions);
assert.commandFailedWithCode(session.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
// 'atClusterTime' must have type Timestamp.
session.startTransaction({readConcern: {level: "snapshot", atClusterTime: "bad"}});
assert.commandFailedWithCode(sessionDb.runCommand({find: collName}), ErrorCodes.TypeMismatch);
assert.commandFailedWithCode(session.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
// 'atClusterTime' cannot be used with readConcern level 'majority'.
session.startTransaction({readConcern: {level: "majority", atClusterTime: clusterTime}});
assert.commandFailedWithCode(sessionDb.runCommand({find: collName}), ErrorCodes.InvalidOptions);
assert.commandFailedWithCode(session.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
// 'atClusterTime' cannot be used with readConcern level 'local'.
session.startTransaction({readConcern: {level: "local", atClusterTime: clusterTime}});
assert.commandFailedWithCode(sessionDb.runCommand({find: collName}), ErrorCodes.InvalidOptions);
assert.commandFailedWithCode(session.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
// 'atClusterTime' cannot be used with readConcern level 'available'.
session.startTransaction({readConcern: {level: "available", atClusterTime: clusterTime}});
assert.commandFailedWithCode(sessionDb.runCommand({find: collName}), ErrorCodes.InvalidOptions);
assert.commandFailedWithCode(session.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
// 'atClusterTime' cannot be used with readConcern level 'linearizable'.
session.startTransaction({readConcern: {level: "linearizable", atClusterTime: clusterTime}});
assert.commandFailedWithCode(sessionDb.runCommand({find: collName}), ErrorCodes.InvalidOptions);
assert.commandFailedWithCode(session.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
// 'atClusterTime' cannot be used without readConcern level (level is 'local' by default).
session.startTransaction({readConcern: {atClusterTime: clusterTime}});
assert.commandFailedWithCode(sessionDb.runCommand({find: collName}), ErrorCodes.InvalidOptions);
assert.commandFailedWithCode(session.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
// 'atClusterTime' cannot be used with 'afterOpTime'.
session.startTransaction({
readConcern: {
level: "snapshot",
atClusterTime: clusterTime,
afterOpTime: {ts: Timestamp(1, 2), t: 1}
}
});
assert.commandFailedWithCode(sessionDb.runCommand({find: collName}), ErrorCodes.InvalidOptions);
assert.commandFailedWithCode(session.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
// 'atClusterTime' cannot be used outside of a session.
assert.commandFailedWithCode(
testDB.runCommand(
{find: collName, readConcern: {level: "snapshot", atClusterTime: clusterTime}}),
ErrorCodes.InvalidOptions);
// 'atClusterTime' cannot be used with 'afterClusterTime'.
session.startTransaction({
readConcern:
{level: "snapshot", atClusterTime: clusterTime, afterClusterTime: clusterTime}
});
assert.commandFailedWithCode(sessionDb.runCommand({find: collName}), ErrorCodes.InvalidOptions);
assert.commandFailedWithCode(session.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
session.endSession();
rst.stopSet();
// readConcern with 'atClusterTime' should succeed regardless of value of 'enableTestCommands'.
{
jsTest.setOption('enableTestCommands', false);
let rst = new ReplSetTest({nodes: 1});
rst.startSet();
rst.initiate();
let session =
rst.getPrimary().getDB(dbName).getMongo().startSession({causalConsistency: false});
let sessionDb = session.getDatabase(dbName);
session.startTransaction(
{readConcern: {level: "snapshot", atClusterTime: _getClusterTime(rst)}});
assert.commandWorked(sessionDb.runCommand({find: collName}));
assert.commandWorked(session.commitTransaction_forTesting());
session.endSession();
rst.stopSet();
jsTest.setOption('enableTestCommands', true);
rst = new ReplSetTest({nodes: 1});
rst.startSet();
rst.initiate();
session =
rst.getPrimary().getDB(dbName).getMongo().startSession({causalConsistency: false});
sessionDb = session.getDatabase(dbName);
session.startTransaction(
{readConcern: {level: "snapshot", atClusterTime: _getClusterTime(rst)}});
assert.commandWorked(sessionDb.runCommand({find: collName}));
assert.commandWorked(session.commitTransaction_forTesting());
session.endSession();
rst.stopSet();
}
// readConcern with 'atClusterTime' is not allowed when enableMajorityReadConcern=false.
{
let rst = new ReplSetTest({nodes: [{"enableMajorityReadConcern": "false"}]});
rst.startSet();
rst.initiate();
let session =
rst.getPrimary().getDB(dbName).getMongo().startSession({causalConsistency: false});
let sessionDb = session.getDatabase(dbName);
session.startTransaction(
{readConcern: {level: "snapshot", atClusterTime: _getClusterTime(rst)}});
assert.commandFailedWithCode(sessionDb.runCommand({find: collName}),
ErrorCodes.InvalidOptions);
assert.commandFailedWithCode(session.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
session.endSession();
rst.stopSet();
}
}());
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