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/**
* Initial sync runs in several phases - the first 3 are as follows:
* 1) fetches the last oplog entry (op_start1) on the source;
* 2) copies all non-local databases from the source; and
* 3) fetches and applies operations from the source after op_start1.
*
* This test updates and deletes a document on the source between phases 1 and 2. The
* secondary will initially fail to apply the update operation in phase 3 and subsequently have
* to attempt to check the source for a new copy of the document. Before the secondary checks the
* source, we insert a new copy of the document into this collection on the source and mark the
* collection on which the document to be fetched resides as drop pending, thus effectively
* renaming the collection but preserving the UUID. This ensures the secondary fetches the
* document by UUID rather than namespace.
*/
(function() {
load("jstests/libs/check_log.js");
load("jstests/replsets/libs/two_phase_drops.js"); // For TwoPhaseDropCollectionTest.
var name = 'initial_sync_update_missing_doc3';
var replSet = new ReplSetTest({
name: name,
nodes: [{}, {rsConfig: {arbiterOnly: true}}],
});
replSet.startSet();
replSet.initiate();
var primary = replSet.getPrimary();
// Check for 'system.drop' two phase drop support.
if (!TwoPhaseDropCollectionTest.supportsDropPendingNamespaces(replSet)) {
jsTestLog('Drop pending namespaces not supported by storage engine. Skipping test.');
replSet.stopSet();
return;
}
var coll = primary.getDB('test').getCollection(name);
assert.writeOK(coll.insert({_id: 0, x: 1}));
// Add a secondary node but make it hang after retrieving the last op on the source
// but before copying databases.
var secondary = replSet.add();
secondary.setSlaveOk();
assert.commandWorked(secondary.getDB('admin').runCommand(
{configureFailPoint: 'initialSyncHangBeforeCopyingDatabases', mode: 'alwaysOn'}));
assert.commandWorked(secondary.getDB('admin').runCommand(
{configureFailPoint: 'initialSyncHangBeforeGettingMissingDocument', mode: 'alwaysOn'}));
replSet.reInitiate();
// Wait for fail point message to be logged.
checkLog.contains(secondary,
'initial sync - initialSyncHangBeforeCopyingDatabases fail point enabled');
assert.writeOK(coll.update({_id: 0}, {x: 2}, {upsert: false, writeConcern: {w: 1}}));
assert.writeOK(coll.remove({_id: 0}, {justOne: true, writeConcern: {w: 1}}));
assert.commandWorked(secondary.getDB('admin').runCommand(
{configureFailPoint: 'initialSyncHangBeforeCopyingDatabases', mode: 'off'}));
checkLog.contains(secondary, 'update of non-mod failed');
checkLog.contains(secondary, 'Fetching missing document');
checkLog.contains(
secondary, 'initial sync - initialSyncHangBeforeGettingMissingDocument fail point enabled');
var doc = {_id: 0, x: 3};
// Re-insert deleted document.
assert.writeOK(coll.insert(doc, {writeConcern: {w: 1}}));
// Mark the collection as drop pending so it gets renamed, but retains the UUID.
assert.commandWorked(primary.getDB('test').runCommand({"drop": name}));
var res = assert.commandWorked(secondary.adminCommand({replSetGetStatus: 1}));
assert.eq(res.initialSyncStatus.fetchedMissingDocs, 0);
var firstOplogEnd = res.initialSyncStatus.initialSyncOplogEnd;
secondary.getDB('test').setLogLevel(1, 'replication');
assert.commandWorked(secondary.getDB('admin').runCommand(
{configureFailPoint: 'initialSyncHangBeforeGettingMissingDocument', mode: 'off'}));
checkLog.contains(secondary, 'Inserted missing document');
secondary.getDB('test').setLogLevel(0, 'replication');
checkLog.contains(secondary, 'initial sync done');
replSet.awaitReplication();
replSet.awaitSecondaryNodes();
replSet.stopSet();
})();
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