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// @tags: [requires_replication, requires_sharding]
(function() {
'use strict';
// This test makes assertions about the number of sessions, which are not compatible with
// implicit sessions.
TestData.disableImplicitSessions = true;
load("jstests/libs/retryable_writes_util.js");
if (!RetryableWritesUtil.storageEngineSupportsRetryableWrites(jsTest.options().storageEngine)) {
jsTestLog("Retryable writes are not supported, skipping test");
return;
}
function Repl(lifetime) {
this.rst = new ReplSetTest({
nodes: 1,
nodeOptions: {setParameter: {TransactionRecordMinimumLifetimeMinutes: lifetime}},
});
this.rst.startSet();
this.rst.initiate();
}
Repl.prototype.stop = function() {
this.rst.stopSet();
};
Repl.prototype.getConn = function() {
return this.rst.getPrimary();
};
Repl.prototype.getTransactionConn = function() {
return this.rst.getPrimary();
};
function Sharding(lifetime) {
this.st = new ShardingTest({
shards: 1,
mongos: 1,
config: 1,
other: {
rs: true,
rsOptions: {setParameter: {TransactionRecordMinimumLifetimeMinutes: lifetime}},
rs0: {nodes: 1},
},
});
this.st.s0.getDB("admin").runCommand({enableSharding: "test"});
this.st.s0.getDB("admin").runCommand({shardCollection: "test.test", key: {_id: 1}});
// Ensure that the sessions collection exists.
assert.commandWorked(
this.st.c0.getDB("admin").runCommand({refreshLogicalSessionCacheNow: 1}));
assert.commandWorked(
this.st.rs0.getPrimary().getDB("admin").runCommand({refreshLogicalSessionCacheNow: 1}));
}
Sharding.prototype.stop = function() {
this.st.stop();
};
Sharding.prototype.getConn = function() {
return this.st.s0;
};
Sharding.prototype.getTransactionConn = function() {
return this.st.rs0.getPrimary();
};
const nSessions = 1500;
function Fixture(impl) {
this.impl = impl;
this.conn = impl.getConn();
this.transactionConn = impl.getTransactionConn();
this.sessions = [];
for (var i = 0; i < nSessions; i++) {
// make a session and get it to the collection
var session = this.conn.startSession({retryWrites: 1});
session.getDatabase("test").test.count({});
this.sessions.push(session);
}
this.refresh();
this.assertOutstandingTransactions(0);
this.assertOutstandingSessions(nSessions);
for (var i = 0; i < nSessions; i++) {
// make a session and get it to the collection
var session = this.sessions[i];
assert.writeOK(session.getDatabase("test").test.save({a: 1}));
}
// Ensure a write flushes a transaction
this.assertOutstandingTransactions(nSessions);
this.assertOutstandingSessions(nSessions);
// Ensure a refresh/reap doesn't remove the transaction
this.refresh();
this.reap();
this.assertOutstandingTransactions(nSessions);
this.assertOutstandingSessions(nSessions);
}
Fixture.prototype.assertOutstandingTransactions = function(count) {
assert.eq(count, this.transactionConn.getDB("config").transactions.count());
};
Fixture.prototype.assertOutstandingSessions = function(count) {
assert.eq(count, this.getDB("config").system.sessions.count());
};
Fixture.prototype.refresh = function() {
assert.commandWorked(this.getDB("admin").runCommand({refreshLogicalSessionCacheNow: 1}));
};
Fixture.prototype.reap = function() {
assert.commandWorked(
this.transactionConn.getDB("admin").runCommand({reapLogicalSessionCacheNow: 1}));
};
Fixture.prototype.getDB = function(db) {
return this.conn.getDB(db);
};
Fixture.prototype.stop = function() {
this.sessions.forEach(function(session) {
session.endSession();
});
return this.impl.stop();
};
[Repl, Sharding].forEach(function(Impl) {
{
var fixture = new Fixture(new Impl(-1));
// Remove a session
fixture.getDB("config").system.sessions.remove({});
fixture.assertOutstandingTransactions(nSessions);
fixture.assertOutstandingSessions(0);
// See the transaction get reaped as a result
fixture.reap();
fixture.assertOutstandingTransactions(0);
fixture.assertOutstandingSessions(0);
fixture.stop();
}
{
var fixture = new Fixture(new Impl(30));
// Remove a session
fixture.getDB("config").system.sessions.remove({});
fixture.assertOutstandingTransactions(nSessions);
fixture.assertOutstandingSessions(0);
// See the transaction was not reaped as a result
fixture.reap();
fixture.assertOutstandingTransactions(nSessions);
fixture.assertOutstandingSessions(0);
fixture.stop();
}
});
})();
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