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/**
* Verifies that a multi-document transaction aborts with WriteConflictError if an index build has
* committed since the transaction's read snapshot.
*
* @tags: [
* requires_replication,
* requires_snapshot_read,
* ]
*/
(function() {
'use strict';
const replTest = new ReplSetTest({nodes: 2});
replTest.startSet();
replTest.initiate();
const primary = replTest.getPrimary();
const db = primary.getDB('test');
// Transaction inserting an index key.
{
assert.commandWorked(db['c'].insertOne({_id: 0, num: 0}));
const s0 = db.getMongo().startSession();
s0.startTransaction();
assert.commandWorked(s0.getDatabase('test')['c'].deleteOne({_id: 0}));
s0.commitTransaction();
const clusterTime = s0.getClusterTime().clusterTime;
assert.commandWorked(db['c'].createIndex({num: 1}));
// Start a transaction whose snapshot predates the completion of the index build, and which
// reserves an oplog entry after the index build commits.
try {
const s1 = db.getMongo().startSession();
s1.startTransaction({readConcern: {level: "snapshot", atClusterTime: clusterTime}});
s1.getDatabase('test').c.insertOne({_id: 1, num: 1});
// Transaction should have failed.
assert(0);
} catch (e) {
assert(e.hasOwnProperty("errorLabels"), tojson(e));
assert.contains("TransientTransactionError", e.errorLabels, tojson(e));
assert.eq(e["code"], ErrorCodes.WriteConflict, tojson(e));
}
}
db.c.drop();
// Transaction deleting an index key.
{
assert.commandWorked(db.createCollection('c'));
const s0 = db.getMongo().startSession();
s0.startTransaction();
assert.commandWorked(s0.getDatabase('test')['c'].insertOne({_id: 0, num: 0}));
s0.commitTransaction();
const clusterTime = s0.getClusterTime().clusterTime;
assert.commandWorked(db['c'].createIndex({num: 1}));
// Start a transaction whose snapshot predates the completion of the index build, and which
// reserves an oplog entry after the index build commits.
try {
const s1 = db.getMongo().startSession();
s1.startTransaction({readConcern: {level: "snapshot", atClusterTime: clusterTime}});
s1.getDatabase('test').c.deleteOne({_id: 0});
// Transaction should have failed.
assert(0);
} catch (e) {
assert(e.hasOwnProperty("errorLabels"), tojson(e));
assert.contains("TransientTransactionError", e.errorLabels, tojson(e));
assert.eq(e["code"], ErrorCodes.WriteConflict, tojson(e));
}
}
replTest.stopSet();
})();
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