(function() {
'use strict';
const configuredMaxConns = 5;
const configuredReadyAdminThreads = 3;
let conn = MongoRunner.runMongod({
    config: "jstests/noPassthrough/libs/max_conns_override_config.yaml",
    // We check a specific field in this executor's serverStatus section
    serviceExecutor: "synchronous",
});

// Use up all the maxConns with junk connections, all of these should succeed
let maxConns = [];
for (let i = 0; i < 5; i++) {
    maxConns.push(new Mongo(`127.0.0.1:${conn.port}`));
    let tmpDb = maxConns[maxConns.length - 1].getDB("admin");
    assert.commandWorked(tmpDb.runCommand({isMaster: 1}));
}

// Get serverStatus to check that we have the right number of threads in the right places
let status = conn.getDB("admin").runCommand({serverStatus: 1});
const connectionsStatus = status["connections"];
const reservedExecutorStatus = connectionsStatus["adminConnections"];
const normalExecutorStatus = status["network"]["serviceExecutorTaskStats"];

// Log these serverStatus sections so we can debug this easily
print("connections status section: ", tojson(connectionsStatus));
print("normal executor status section: ", tojson(normalExecutorStatus));

// The number of "available" connections should be less than zero, because we've used
// all of maxConns. We're over the limit!
assert.lt(connectionsStatus["available"], 0);
// The number of "current" connections should be greater than maxConns
assert.gt(connectionsStatus["current"], configuredMaxConns);
// The number of ready threads should be the number of readyThreads we configured, since
// every thread spawns a new thread on startup
assert.eq(reservedExecutorStatus["readyThreads"] + reservedExecutorStatus["startingThreads"],
          configuredReadyAdminThreads);
// The number of running admin threads should be greater than the readyThreads, because
// one is being used right now
assert.gt(reservedExecutorStatus["threadsRunning"], reservedExecutorStatus["readyThreads"]);
// The normal serviceExecutor should only be running maxConns number of threads
assert.eq(normalExecutorStatus["threadsRunning"], configuredMaxConns);

MongoRunner.stopMongod(conn);
})();