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// Test background index creation w/ constraints
// @tags: [SERVER-40561, requires_document_locking]
(function() {
"use strict";
load("jstests/noPassthrough/libs/index_build.js");
load("jstests/libs/check_log.js");
const conn = MongoRunner.runMongod({smallfiles: "", nojournal: ""});
assert.neq(null, conn, "mongod failed to start.");
let db = conn.getDB("test");
let baseName = "jstests_index12";
let parallel = function() {
return db[baseName + "_parallelStatus"];
};
let resetParallel = function() {
parallel().drop();
};
// Return the PID to call `waitpid` on for clean shutdown.
let doParallel = function(work) {
resetParallel();
return startMongoProgramNoConnect(
"mongo",
"--eval",
work + "; db." + baseName + "_parallelStatus.save( {done:1} );",
db.getMongo().host);
};
let indexBuild = function() {
let fullName = "db." + baseName;
return doParallel(fullName + ".ensureIndex( {i:1}, {background:true, unique:true} )");
};
let doneParallel = function() {
return !!parallel().findOne();
};
let waitParallel = function() {
assert.soon(function() {
return doneParallel();
}, "parallel did not finish in time", 300000, 1000);
};
let turnFailPointOn = function(failPointName, i) {
assert.commandWorked(conn.adminCommand(
{configureFailPoint: failPointName, mode: "alwaysOn", data: {"i": i}}));
};
let turnFailPointOff = function(failPointName) {
assert.commandWorked(conn.adminCommand({configureFailPoint: failPointName, mode: "off"}));
};
// Unique background index build fails when there exists duplicate indexed values
// for the duration of the build.
let failOnExistingDuplicateValue = function(coll) {
let duplicateKey = 0;
assert.writeOK(coll.save({i: duplicateKey}));
let bgIndexBuildPid = indexBuild();
waitProgram(bgIndexBuildPid);
assert.eq(1, coll.getIndexes().length, "Index should fail. There exist duplicate values.");
// Revert to unique key set
coll.deleteOne({i: duplicateKey});
};
// Unique background index build fails when started with a unique key set,
// but a document with a duplicate key is inserted prior to that key being indexed.
let failOnInsertedDuplicateValue = function(coll) {
let duplicateKey = 7;
turnFailPointOn("hangBeforeIndexBuildOf", duplicateKey);
let bgIndexBuildPid;
try {
bgIndexBuildPid = indexBuild();
jsTestLog("Waiting to hang before index build of i=" + duplicateKey);
checkLog.contains(conn, "Hanging before index build of i=" + duplicateKey);
assert.writeOK(coll.save({i: duplicateKey}));
} finally {
turnFailPointOff("hangBeforeIndexBuildOf");
}
waitProgram(bgIndexBuildPid);
assert.eq(1,
coll.getIndexes().length,
"Index should fail. Duplicate key is inserted prior to that key being indexed.");
// Revert to unique key set
coll.deleteOne({i: duplicateKey});
};
// Unique background index build succeeds:
// 1) when a document is inserted with a key that has already been indexed
// (with the insert failing on duplicate key error).
// 2) when a document with a key not present in the initial set is inserted twice
// (with the initial insert succeeding and the second failing on duplicate key error).
let succeedWithWriteErrors = function(coll, newKey) {
let duplicateKey = 3;
turnFailPointOn("hangAfterIndexBuildOf", duplicateKey);
let bgIndexBuildPid;
try {
bgIndexBuildPid = indexBuild();
jsTestLog("Waiting to hang after index build of i=" + duplicateKey);
checkLog.contains(conn, "Hanging after index build of i=" + duplicateKey);
assert.writeError(coll.save({i: duplicateKey, n: true}));
// First insert on key not present in initial set
assert.writeOK(coll.save({i: newKey, n: true}));
} catch (e) {
turnFailPointOff("hangAfterIndexBuildOf");
throw e;
}
try {
// We are currently hanging after indexing document with {i: duplicateKey}.
// To perform next check, we need to hang after indexing document with {i: newKey}.
// Add a hang before indexing document {i: newKey}, then turn off current hang
// so we are always in a known state and don't skip over the indexing of {i: newKey}.
turnFailPointOn("hangBeforeIndexBuildOf", newKey);
turnFailPointOff("hangAfterIndexBuildOf");
turnFailPointOn("hangAfterIndexBuildOf", newKey);
turnFailPointOff("hangBeforeIndexBuildOf");
// Second insert on key not present in intial set fails with duplicate key error
jsTestLog("Waiting to hang after index build of i=" + newKey);
checkLog.contains(conn, "Hanging after index build of i=" + newKey);
assert.writeError(coll.save({i: newKey, n: true}));
} finally {
turnFailPointOff("hangBeforeIndexBuildOf");
turnFailPointOff("hangAfterIndexBuildOf");
}
waitProgram(bgIndexBuildPid);
assert.eq(2, coll.getIndexes().length, "Index build should succeed");
};
let doTest = function() {
"use strict";
const size = 10;
let coll = db[baseName];
coll.drop();
for (let i = 0; i < size; ++i) {
assert.writeOK(coll.save({i: i}));
}
assert.eq(size, coll.count());
assert.eq(1, coll.getIndexes().length, "_id index should already exist");
failOnExistingDuplicateValue(coll);
assert.eq(size, coll.count());
failOnInsertedDuplicateValue(coll);
assert.eq(size, coll.count());
succeedWithWriteErrors(coll, size);
waitParallel();
};
doTest();
MongoRunner.stopMongod(conn);
})();
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