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load("jstests/libs/conn_pool_helpers.js");
/**
* @tags: [requires_replication, requires_sharding, sets_replica_set_matching_strategy]
*/
(function() {
"use strict";
const kDbName = 'test';
const minConns = 4;
var stepParams = {
ShardingTaskExecutorPoolMinSize: minConns,
ShardingTaskExecutorPoolMaxSize: 10,
ShardingTaskExecutorPoolMaxConnecting: 5,
ShardingTaskExecutorPoolHostTimeoutMS: 300000,
ShardingTaskExecutorPoolRefreshRequirementMS: 60000,
ShardingTaskExecutorPoolRefreshTimeoutMS: 20000,
ShardingTaskExecutorPoolReplicaSetMatching: "disabled",
};
const st = new ShardingTest({
config: {nodes: 1},
shards: 1,
rs0: {nodes: 1},
mongos: [{setParameter: stepParams}],
});
const mongos = st.s0;
const rst = st.rs0;
const primary = rst.getPrimary();
const cfg = primary.getDB('local').system.replset.findOne();
const allHosts = cfg.members.map(x => x.host);
const mongosDB = mongos.getDB(kDbName);
const primaryOnly = [primary.name];
var threads = [];
var currentCheckNum = 0;
function updateSetParameters(params) {
var cmd = Object.assign({"setParameter": 1}, params);
assert.commandWorked(mongos.adminCommand(cmd));
}
function dropConnections() {
assert.commandWorked(mongos.adminCommand({dropConnections: 1, hostAndPort: allHosts}));
}
function resetPools() {
dropConnections();
mongos.adminCommand({multicast: {ping: 0}});
currentCheckNum = assertHasConnPoolStats(mongos, allHosts, {ready: 4}, currentCheckNum);
}
function runSubTest(name, fun) {
jsTestLog("Running test for " + name);
resetPools();
fun();
updateSetParameters(stepParams);
}
assert.commandWorked(mongosDB.test.insert({x: 1}));
assert.commandWorked(mongosDB.test.insert({x: 2}));
assert.commandWorked(mongosDB.test.insert({x: 3}));
st.rs0.awaitReplication();
runSubTest("MinSize", function() {
dropConnections();
// Launch an initial find to trigger to min
launchFinds(mongos, threads, {times: 1, readPref: "primary"});
currentCheckNum = assertHasConnPoolStats(mongos, allHosts, {ready: minConns}, currentCheckNum);
// Increase by one
updateSetParameters({ShardingTaskExecutorPoolMinSize: 5});
currentCheckNum = assertHasConnPoolStats(mongos, allHosts, {ready: 5}, currentCheckNum);
// Increase to MaxSize
updateSetParameters({ShardingTaskExecutorPoolMinSize: 10});
currentCheckNum = assertHasConnPoolStats(mongos, allHosts, {ready: 10}, currentCheckNum);
// Decrease to zero
updateSetParameters({ShardingTaskExecutorPoolMinSize: 0});
});
runSubTest("MaxSize", function() {
configureReplSetFailpoint(st, kDbName, "waitInFindBeforeMakingBatch", "alwaysOn");
dropConnections();
// Launch 10 blocked finds
launchFinds(mongos, threads, {times: 10, readPref: "primary"});
currentCheckNum =
assertHasConnPoolStats(mongos, allHosts, {active: 10, hosts: primaryOnly}, currentCheckNum);
// Increase by 5 and Launch another 4 blocked finds
updateSetParameters({ShardingTaskExecutorPoolMaxSize: 15});
launchFinds(mongos, threads, {times: 4, readPref: "primary"});
currentCheckNum =
assertHasConnPoolStats(mongos, allHosts, {active: 14, hosts: primaryOnly}, currentCheckNum);
// Launch yet another 2, these should add only 1 connection
launchFinds(mongos, threads, {times: 2, readPref: "primary"});
currentCheckNum =
assertHasConnPoolStats(mongos, allHosts, {active: 15, hosts: primaryOnly}, currentCheckNum);
configureReplSetFailpoint(st, kDbName, "waitInFindBeforeMakingBatch", "off");
currentCheckNum = assertHasConnPoolStats(
mongos, allHosts, {ready: 15, pending: 0, hosts: primaryOnly}, currentCheckNum);
});
// Test maxConnecting
runSubTest("MaxConnecting", function() {
const maxPending1 = 2;
const maxPending2 = 4;
const conns = 6;
updateSetParameters({
ShardingTaskExecutorPoolMaxSize: 100,
ShardingTaskExecutorPoolMaxConnecting: maxPending1,
});
configureReplSetFailpoint(st, kDbName, "waitInHello", "alwaysOn");
configureReplSetFailpoint(st, kDbName, "waitInFindBeforeMakingBatch", "alwaysOn");
dropConnections();
// Go to the limit of maxConnecting, so we're stuck here
launchFinds(mongos, threads, {times: maxPending1, readPref: "primary"});
currentCheckNum =
assertHasConnPoolStats(mongos, allHosts, {pending: maxPending1}, currentCheckNum);
// More won't run right now
launchFinds(mongos, threads, {times: conns - maxPending1, readPref: "primary"});
currentCheckNum =
assertHasConnPoolStats(mongos, allHosts, {pending: maxPending1}, currentCheckNum);
// If we increase our limit, it should fill in some of the connections
updateSetParameters({ShardingTaskExecutorPoolMaxConnecting: maxPending2});
currentCheckNum =
assertHasConnPoolStats(mongos, allHosts, {pending: maxPending2}, currentCheckNum);
// Dropping the limit doesn't cause us to drop pending
updateSetParameters({ShardingTaskExecutorPoolMaxConnecting: maxPending1});
currentCheckNum =
assertHasConnPoolStats(mongos, allHosts, {pending: maxPending2}, currentCheckNum);
// Release our pending and walk away
configureReplSetFailpoint(st, kDbName, "waitInHello", "off");
currentCheckNum =
assertHasConnPoolStats(mongos,
allHosts,
{
// Expects the number of pending connections to be zero.
checkStatsFunc: function(stats) {
return stats.refreshing == 0;
}
},
currentCheckNum);
configureReplSetFailpoint(st, kDbName, "waitInFindBeforeMakingBatch", "off");
});
runSubTest("Timeouts", function() {
const conns = minConns;
const pendingTimeoutMS = 5000;
const toRefreshTimeoutMS = 1000;
const idleTimeoutMS1 = 20000;
const idleTimeoutMS2 = 15500;
// Updating separately since the validation depends on existing params
updateSetParameters({
ShardingTaskExecutorPoolRefreshTimeoutMS: pendingTimeoutMS,
});
updateSetParameters({
ShardingTaskExecutorPoolRefreshRequirementMS: toRefreshTimeoutMS,
});
updateSetParameters({
ShardingTaskExecutorPoolHostTimeoutMS: idleTimeoutMS1,
});
configureReplSetFailpoint(st, kDbName, "waitInFindBeforeMakingBatch", "alwaysOn");
dropConnections();
// Make ready connections
launchFinds(mongos, threads, {times: conns, readPref: "primary"});
configureReplSetFailpoint(st, kDbName, "waitInFindBeforeMakingBatch", "off");
currentCheckNum = assertHasConnPoolStats(mongos, allHosts, {ready: conns}, currentCheckNum);
// Block refreshes and wait for the toRefresh timeout
configureReplSetFailpoint(st, kDbName, "waitInHello", "alwaysOn");
sleep(toRefreshTimeoutMS);
// Confirm that we're in pending for all of our conns
currentCheckNum = assertHasConnPoolStats(mongos, allHosts, {pending: conns}, currentCheckNum);
// Set our min conns to 0 to make sure we don't refresh after pending timeout
updateSetParameters({
ShardingTaskExecutorPoolMinSize: 0,
});
// Wait for our pending timeout
sleep(pendingTimeoutMS);
currentCheckNum = assertHasConnPoolStats(mongos, allHosts, {}, currentCheckNum);
configureReplSetFailpoint(st, kDbName, "waitInHello", "off");
// Reset the min conns to make sure normal refresh doesn't extend the timeout
updateSetParameters({
ShardingTaskExecutorPoolMinSize: minConns,
});
// Wait for our host timeout and confirm the pool drops
sleep(idleTimeoutMS1);
currentCheckNum = assertHasConnPoolStats(mongos, allHosts, {isAbsent: true}, currentCheckNum);
// Reset the pool
resetPools();
// Sleep for a shorter timeout and then update so we're already expired
sleep(idleTimeoutMS2);
updateSetParameters({ShardingTaskExecutorPoolHostTimeoutMS: idleTimeoutMS2});
currentCheckNum = assertHasConnPoolStats(mongos, allHosts, {isAbsent: true}, currentCheckNum);
});
threads.forEach(function(thread) {
thread.join();
});
st.stop();
})();
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