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// Test that causally consistent majority-committed read-only transactions will wait for the
// majority commit point to move past 'afterClusterTime' before they can commit.
// @tags: [
// requires_majority_read_concern,
// uses_transactions,
// ]
(function() {
"use strict";
load("jstests/libs/write_concern_util.js"); // For stopReplicationOnSecondaries.
const dbName = "test";
const collName = "coll";
const rst = new ReplSetTest({nodes: 2});
rst.startSet();
rst.initiate();
const session = rst.getPrimary().getDB(dbName).getMongo().startSession({causalConsistency: false});
const primaryDB = session.getDatabase(dbName);
let txnNumber = 0;
function testReadConcernLevel(level) {
// Stop replication.
stopReplicationOnSecondaries(rst);
// Perform a write and get its op time.
const res = assert.commandWorked(primaryDB.runCommand({insert: collName, documents: [{}]}));
assert(res.hasOwnProperty("opTime"), tojson(res));
assert(res.opTime.hasOwnProperty("ts"), tojson(res));
const clusterTime = res.opTime.ts;
// A majority-committed read-only transaction on the primary after the new cluster time
// should time out at commit time waiting for the cluster time to be majority committed.
assert.commandWorked(primaryDB.runCommand({
find: collName,
txnNumber: NumberLong(++txnNumber),
startTransaction: true,
autocommit: false,
readConcern: {level: level, afterClusterTime: clusterTime}
}));
assert.commandFailedWithCode(primaryDB.adminCommand({
commitTransaction: 1,
txnNumber: NumberLong(txnNumber),
autocommit: false,
writeConcern: {w: "majority"},
maxTimeMS: 1000
}),
ErrorCodes.MaxTimeMSExpired);
// Restart replication.
restartReplicationOnSecondaries(rst);
// A majority-committed read-only transaction on the primary after the new cluster time now
// succeeds.
assert.commandWorked(primaryDB.runCommand({
find: collName,
txnNumber: NumberLong(++txnNumber),
startTransaction: true,
autocommit: false,
readConcern: {level: level, afterClusterTime: clusterTime}
}));
assert.commandWorked(primaryDB.adminCommand({
commitTransaction: 1,
txnNumber: NumberLong(txnNumber),
autocommit: false,
writeConcern: {w: "majority"}
}));
}
testReadConcernLevel("majority");
testReadConcernLevel("snapshot");
rst.stopSet();
}());
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