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// Test the populating lastOpVisible field of the ReplSetMetadata.
// First we do a writeConcern-free write and ensure that a local read will return the same
// lastOpVisible, and that majority read with afterOpTime of lastOpVisible will return it as well.
// We then confirm that a writeConcern majority write will be seen as the lastVisibleOp by a
// majority read.
(function() {
"use strict";
var name = 'lastOpVisible';
var replTest = new ReplSetTest({name: name,
nodes: 3,
nodeOptions: {enableMajorityReadConcern: ''}});
try {
replTest.startSet();
} catch (e) {
var conn = MongoRunner.runMongod();
if (!conn.getDB('admin').serverStatus().storageEngine.supportsCommittedReads) {
print("Skipping read_majority.js since storageEngine doesn't support it.");
MongoRunner.stopMongod(conn);
return;
}
throw e;
}
replTest.initiate();
var primary = replTest.getPrimary();
// Do an insert without writeConcern.
var res = primary.getDB(name).runCommandWithMetadata("insert",
{insert: name, documents: [{x:1}]},
{"$replData": 1});
assert.commandWorked(res.commandReply);
var last_op_visible = res.metadata["$replData"].lastOpVisible;
// A find should return the same lastVisibleOp.
res = primary.getDB(name).runCommandWithMetadata("find",
{find: name, readConcern: {level: "local"}},
{"$replData": 1});
assert.commandWorked(res.commandReply);
assert.eq(last_op_visible, res.metadata["$replData"].lastOpVisible);
// A majority readConcern with afterOpTime: lastOpVisible should also return the same lastVisibleOp.
res = primary.getDB(name).runCommandWithMetadata(
"find",
{find: name, readConcern: {level: "majority", afterOpTime: last_op_visible}},
{"$replData": 1});
assert.commandWorked(res.commandReply);
assert.eq(last_op_visible, res.metadata["$replData"].lastOpVisible);
// Do an insert without writeConcern.
res = primary.getDB(name).runCommandWithMetadata(
"insert",
{insert: name, documents: [{x:1}], writeConcern: {w: "majority"}},
{"$replData": 1});
assert.commandWorked(res.commandReply);
last_op_visible = res.metadata["$replData"].lastOpVisible;
// A majority readConcern should return the same lastVisibleOp.
res = primary.getDB(name).runCommandWithMetadata("find",
{find: name, readConcern: {level: "majority"}},
{"$replData": 1});
assert.commandWorked(res.commandReply);
assert.eq(last_op_visible, res.metadata["$replData"].lastOpVisible);
}());
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