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/**
* Test the behavior of per-batch writeConcern in dbCheck.
*
* @tags: [
* # We need persistence as we temporarily restart nodes.
* requires_persistence,
* assumes_against_mongod_not_mongos,
* ]
*/
(function() {
"use strict";
const replSet = new ReplSetTest({
name: "dbCheckWriteConcern",
nodes: 2,
nodeOptions: {setParameter: {dbCheckHealthLogEveryNBatches: 1}},
settings: {
// Prevent the primary from stepping down when we temporarily shut down the secondary.
electionTimeoutMillis: 60000
}
});
replSet.startSet();
replSet.initiate();
function forEachSecondary(f) {
for (let secondary of replSet.getSecondaries()) {
f(secondary);
}
}
function forEachNode(f) {
f(replSet.getPrimary());
forEachSecondary(f);
}
// Clear local.system.healthlog.
function clearLog() {
forEachNode(conn => conn.getDB("local").system.healthlog.drop());
}
const dbName = "dbCheck-writeConcern";
const collName = "test";
const primary = replSet.getPrimary();
const db = primary.getDB(dbName);
const coll = db[collName];
const healthlog = db.getSiblingDB('local').system.healthlog;
// Validate that w:majority behaves normally.
(function testWMajority() {
clearLog();
coll.drop();
// Insert 1000 docs and run a few small batches to ensure we wait for write concern between
// each one.
const nDocs = 1000;
const maxDocsPerBatch = 100;
assert.commandWorked(coll.insertMany([...Array(nDocs).keys()].map(x => ({a: x}))));
assert.commandWorked(db.runCommand({
dbCheck: coll.getName(),
maxDocsPerBatch: maxDocsPerBatch,
batchWriteConcern: {w: 'majority'},
}));
// Confirm dbCheck logs the expected number of batches.
assert.soon(function() {
return (healthlog.find({operation: "dbCheckBatch", severity: "info"}).itcount() ==
nDocs / maxDocsPerBatch);
}, "dbCheck doesn't seem to complete", 60 * 1000);
// Confirm there are no warnings or errors.
assert.eq(healthlog.find({operation: "dbCheckBatch", severity: "warning"}).itcount(), 0);
assert.eq(healthlog.find({operation: "dbCheckBatch", severity: "error"}).itcount(), 0);
})();
// Validate that w:2 behaves normally.
(function testW2() {
clearLog();
coll.drop();
// Insert 1000 docs and run a few small batches to ensure we wait for write concern between
// each one.
const nDocs = 1000;
const maxDocsPerBatch = 100;
assert.commandWorked(coll.insertMany([...Array(nDocs).keys()].map(x => ({a: x}))));
assert.commandWorked(db.runCommand({
dbCheck: coll.getName(),
maxDocsPerBatch: maxDocsPerBatch,
batchWriteConcern: {w: 2},
}));
// Confirm dbCheck logs the expected number of batches.
assert.soon(function() {
return (healthlog.find({operation: "dbCheckBatch", severity: "info"}).itcount() ==
nDocs / maxDocsPerBatch);
}, "dbCheck doesn't seem to complete", 60 * 1000);
// Confirm there are no warnings or errors.
assert.eq(healthlog.find({operation: "dbCheckBatch", severity: "warning"}).itcount(), 0);
assert.eq(healthlog.find({operation: "dbCheckBatch", severity: "error"}).itcount(), 0);
})();
// Validate that dbCheck completes with w:majority even when the secondary is down and a wtimeout is
// specified.
(function testWMajorityUnavailable() {
clearLog();
coll.drop();
// Insert 1000 docs and run a few small batches to ensure we wait for write concern between
// each one.
const nDocs = 1000;
const maxDocsPerBatch = 100;
assert.commandWorked(coll.insertMany([...Array(nDocs).keys()].map(x => ({a: x}))));
replSet.awaitReplication();
// Stop the secondary and expect that the dbCheck batches still complete on the primary.
const secondaryConn = replSet.getSecondary();
const secondaryNodeId = replSet.getNodeId(secondaryConn);
replSet.stop(secondaryNodeId, {forRestart: true /* preserve dbPath */});
assert.commandWorked(db.runCommand({
dbCheck: coll.getName(),
maxDocsPerBatch: maxDocsPerBatch,
batchWriteConcern: {w: 'majority', wtimeout: 10},
}));
// Confirm dbCheck logs the expected number of batches.
assert.soon(function() {
return (healthlog.find({operation: "dbCheckBatch", severity: "info"}).itcount() ==
nDocs / maxDocsPerBatch);
}, "dbCheck doesn't seem to complete", 60 * 1000);
// Confirm dbCheck logs a warning for every batch.
assert.soon(function() {
return (healthlog.find({operation: "dbCheckBatch", severity: "warning"}).itcount() ==
nDocs / maxDocsPerBatch);
}, "dbCheck did not log writeConcern warnings", 60 * 1000);
// There should be no errors.
assert.eq(healthlog.find({operation: "dbCheckBatch", severity: "error"}).itcount(), 0);
replSet.start(secondaryNodeId, {}, true /*restart*/);
replSet.awaitNodesAgreeOnPrimaryNoAuth();
replSet.awaitReplication();
})();
// Validate that an invalid 'w' setting still allows dbCheck to succeed when presented with a
// wtimeout.
(function testW3Unavailable() {
clearLog();
coll.drop();
// Insert 1000 docs and run a few small batches to ensure we wait for write concern between
// each one.
const nDocs = 1000;
const maxDocsPerBatch = 100;
assert.commandWorked(coll.insertMany([...Array(nDocs).keys()].map(x => ({a: x}))));
replSet.awaitReplication();
// Stop the secondary and expect that the dbCheck batches still complete on the primary.
const secondaryConn = replSet.getSecondary();
const secondaryNodeId = replSet.getNodeId(secondaryConn);
replSet.stop(secondaryNodeId, {forRestart: true /* preserve dbPath */});
assert.commandWorked(db.runCommand({
dbCheck: coll.getName(),
maxDocsPerBatch: maxDocsPerBatch,
batchWriteConcern: {w: 3, wtimeout: 10},
}));
// Confirm dbCheck logs the expected number of batches.
assert.soon(function() {
return (healthlog.find({operation: "dbCheckBatch", severity: "info"}).itcount() ==
nDocs / maxDocsPerBatch);
}, "dbCheck doesn't seem to complete", 60 * 1000);
// Confirm dbCheck logs a warning for every batch.
assert.soon(function() {
return (healthlog.find({operation: "dbCheckBatch", severity: "warning"}).itcount() ==
nDocs / maxDocsPerBatch);
}, "dbCheck did not log writeConcern warnings", 60 * 1000);
// There should be no errors.
assert.eq(healthlog.find({operation: "dbCheckBatch", severity: "error"}).itcount(), 0);
})();
replSet.stopSet();
})();
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