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/**
* Verifies that the validate hook is able to upgrade the feature compatibility version of the
* server regardless of what state any previous upgrades or downgrades have left it in (besides
* the isCleaningServerMetadata state, where we must complete the downgrade before upgrading).
*/
// The global 'db' variable is used by the data consistency hooks.
var db;
(function() {
"use strict";
// We skip doing the data consistency checks while terminating the cluster because they conflict
// with the counts of the number of times the "validate" command is run.
TestData.skipCollectionAndIndexValidation = true;
function makePatternForValidate(dbName, collName) {
return new RegExp(
`Slow query.*"ns":"${dbName}\\.\\$cmd","appName":"MongoDB Shell","command":{"validate":"${
collName}"`,
"g");
}
function makePatternForSetFCV(targetVersion) {
return new RegExp(
`Slow query.*"appName":"MongoDB Shell","command":{"setFeatureCompatibilityVersion":"${
targetVersion}"`,
"g");
}
function makePatternForSetParameter(paramName) {
return new RegExp(
`Slow query.*"appName":"MongoDB Shell","command":{"setParameter":1,"${paramName}":`, "g");
}
function countMatches(pattern, output) {
assert(pattern.global, "the 'g' flag must be used to find all matches");
let numMatches = 0;
while (pattern.exec(output) !== null) {
++numMatches;
}
return numMatches;
}
function runValidateHook(testCase) {
db = testCase.conn.getDB("test");
TestData.forceValidationWithFeatureCompatibilityVersion = latestFCV;
try {
clearRawMongoProgramOutput();
load("jstests/hooks/run_validate_collections.js");
// We terminate the processes to ensure that the next call to rawMongoProgramOutput()
// will return all of their output.
testCase.teardown();
return rawMongoProgramOutput();
} finally {
db = undefined;
TestData.forceValidationWithFeatureCompatibilityVersion = undefined;
}
}
function testStandalone(additionalSetupFn, {
expectedAtTeardownFCV,
expectedSetLastLTSFCV: expectedSetLastLTSFCV = 0,
expectedSetLatestFCV: expectedSetLatestFCV = 0
} = {}) {
const conn =
MongoRunner.runMongod({setParameter: {logComponentVerbosity: tojson({command: 1})}});
assert.neq(conn, "mongod was unable to start up");
// Insert a document so the "validate" command has some actual work to do.
assert.commandWorked(conn.getDB("test").mycoll.insert({}));
// Run the additional setup function to put the server into the desired state.
additionalSetupFn(conn);
const output = runValidateHook({
conn: conn,
teardown: () => {
// The validate hook should leave the server with a feature compatibility version of
// 'expectedAtTeardownFCV' and no targetVersion.
checkFCV(conn.getDB("admin"), expectedAtTeardownFCV);
MongoRunner.stopMongod(conn);
}
});
let pattern = makePatternForValidate("test", "mycoll");
assert.eq(1,
countMatches(pattern, output),
"expected to find " + tojson(pattern) + " from mongod in the log output");
for (let [targetVersion, expectedCount] of [[lastLTSFCV, expectedSetLastLTSFCV],
[latestFCV, expectedSetLatestFCV]]) {
// Since the additionalSetupFn() function may run the setFeatureCompatibilityVersion
// command and we don't have a guarantee those log messages were cleared when
// clearRawMongoProgramOutput() was called, we assert 'expectedSetLastLTSFCV' and
// 'expectedSetLatestFCV' as lower bounds.
const pattern = makePatternForSetFCV(targetVersion);
assert.lte(expectedCount,
countMatches(pattern, output),
"expected to find " + tojson(pattern) + " from mongod in the log output");
}
pattern = makePatternForSetParameter("transactionLifetimeLimitSeconds");
assert.eq(2,
countMatches(pattern, output),
"expected to find " + tojson(pattern) + " from mongod in the log output twice");
}
function forceInterruptedUpgradeOrDowngrade(conn, targetVersion) {
// We create a separate connection to the server exclusively for running the
// setFeatureCompatibilityVersion command so only that operation is ever interrupted by
// the checkForInterruptFail failpoint.
const setFCVConn = new Mongo(conn.host);
const myUriRes = assert.commandWorked(setFCVConn.adminCommand({whatsmyuri: 1}));
const myUri = myUriRes.you;
const curOpRes = assert.commandWorked(setFCVConn.adminCommand({currentOp: 1, client: myUri}));
const threadName = curOpRes.inprog[0].desc;
assert.commandWorked(conn.adminCommand({
configureFailPoint: "checkForInterruptFail",
mode: "alwaysOn",
data: {threadName, chance: 0.05},
}));
let attempts = 0;
assert.soon(
function() {
let res = setFCVConn.adminCommand({setFeatureCompatibilityVersion: targetVersion});
if (res.ok === 1) {
assert.commandWorked(res);
} else {
assert.commandFailedWithCode(res, ErrorCodes.Interrupted);
}
++attempts;
res = assert.commandWorked(
conn.adminCommand({getParameter: 1, featureCompatibilityVersion: 1}));
if (res.featureCompatibilityVersion.hasOwnProperty("targetVersion")) {
const fcvDoc = conn.getDB("admin")
.system.version.find({_id: "featureCompatibilityVersion"})
.limit(1)
.readConcern("local")
.next();
if (fcvDoc.isCleaningServerMetadata) {
checkFCV(conn.getDB("admin"),
lastLTSFCV,
targetVersion,
true /*isCleaningServerMetadata*/);
// If the setFCV command was interrupted while in the isCleaningServerMetadata
// state, we must complete the FCV downgrade successfully.
assert.commandWorked(
conn.adminCommand({setFeatureCompatibilityVersion: lastLTSFCV}));
} else {
checkFCV(conn.getDB("admin"), lastLTSFCV, targetVersion);
jsTest.log(`Reached partially downgraded state after ${attempts} attempts`);
return true;
}
}
// Either upgrade the feature compatibility version so we can try downgrading again,
// or downgrade the feature compatibility version so we can try upgrading again.
// Note that we're using 'conn' rather than 'setFCVConn' to avoid the upgrade being
// interrupted.
assert.commandWorked(conn.adminCommand({
setFeatureCompatibilityVersion: targetVersion === lastLTSFCV ? latestFCV
: lastLTSFCV
}));
},
"failed to get featureCompatibilityVersion document into a partially downgraded" +
" state");
assert.commandWorked(conn.adminCommand({
configureFailPoint: "checkForInterruptFail",
mode: "off",
}));
}
(function testStandaloneInLatestFCV() {
testStandalone(conn => {
checkFCV(conn.getDB("admin"), latestFCV);
}, {expectedAtTeardownFCV: latestFCV});
})();
(function testStandaloneInLastLTSFCV() {
testStandalone(conn => {
assert.commandWorked(conn.adminCommand({setFeatureCompatibilityVersion: lastLTSFCV}));
checkFCV(conn.getDB("admin"), lastLTSFCV);
}, {expectedAtTeardownFCV: lastLTSFCV, expectedSetLastLTSFCV: 1, expectedSetLatestFCV: 1});
})();
(function testStandaloneWithInterruptedFCVDowngrade() {
testStandalone(conn => {
forceInterruptedUpgradeOrDowngrade(conn, lastLTSFCV);
}, {expectedAtTeardownFCV: lastLTSFCV, expectedSetLastLTSFCV: 2, expectedSetLatestFCV: 1});
})();
(function testStandaloneWithInterruptedFCVUpgrade() {
testStandalone(conn => {
assert.commandWorked(conn.adminCommand({setFeatureCompatibilityVersion: lastLTSFCV}));
forceInterruptedUpgradeOrDowngrade(conn, latestFCV);
}, {expectedAtTeardownFCV: lastLTSFCV, expectedSetLastLTSFCV: 1, expectedSetLatestFCV: 1});
})();
})();
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