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// Tests that the $changeStream stage returns an error when run against a standalone mongod.
// @tags: [requires_sharding, uses_change_streams]
(function() {
"use strict";
load("jstests/aggregation/extras/utils.js"); // For assertErrorCode.
// For supportsMajorityReadConcern().
load("jstests/multiVersion/libs/causal_consistency_helpers.js");
load("jstests/libs/feature_compatibility_version.js"); // For checkFCV.
// Skip this test if running with --nojournal and WiredTiger.
if (jsTest.options().noJournal &&
(!jsTest.options().storageEngine || jsTest.options().storageEngine === "wiredTiger")) {
print("Skipping test because running WiredTiger without journaling isn't a valid" +
" replica set configuration");
return;
}
if (!supportsMajorityReadConcern()) {
jsTestLog("Skipping test since storage engine doesn't support majority read concern.");
return;
}
function assertChangeStreamNotSupportedOnConnection(conn) {
const notReplicaSetErrorCode = 40573;
assertErrorCode(
conn.getDB("test").non_existent, [{$changeStream: {}}], notReplicaSetErrorCode);
assertErrorCode(conn.getDB("test").non_existent,
[{$changeStream: {fullDocument: "updateLookup"}}],
notReplicaSetErrorCode);
}
const conn = MongoRunner.runMongod({enableMajorityReadConcern: ""});
assert.neq(null, conn, "mongod was unable to start up");
// $changeStream cannot run on a non-existent database.
assert.writeOK(conn.getDB("test").ensure_db_exists.insert({}));
assertChangeStreamNotSupportedOnConnection(conn);
assert.eq(0, MongoRunner.stopMongod(conn));
// Test a sharded cluster with standalone shards.
// TODO: Remove 'shardAsReplicaSet: false' when SERVER-32672 is fixed.
const clusterWithStandalones = new ShardingTest({
shards: 2,
other: {shardOptions: {enableMajorityReadConcern: ""}},
config: 1,
shardAsReplicaSet: false
});
// Make sure the database exists before running any commands.
const mongosDB = clusterWithStandalones.getDB("test");
// enableSharding will create the db at the cluster level but not on the shards. $changeStream
// through mongoS will be allowed to run on the shards despite the lack of a database.
assert.commandWorked(mongosDB.adminCommand({enableSharding: "test"}));
assertChangeStreamNotSupportedOnConnection(clusterWithStandalones.s);
// Shard the 'ensure_db_exists' collection on a hashed key before running $changeStream on the
// shards directly. This will ensure that the database is created on both shards.
assert.commandWorked(
mongosDB.adminCommand({shardCollection: "test.ensure_db_exists", key: {_id: "hashed"}}));
assertChangeStreamNotSupportedOnConnection(clusterWithStandalones.shard0);
assertChangeStreamNotSupportedOnConnection(clusterWithStandalones.shard1);
clusterWithStandalones.stop();
}());
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