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(function() {
'use strict';
load("jstests/libs/host_ipaddr.js");
const configuredMaxConns = 5;
const configuredReadyAdminThreads = 3;
let conn = MongoRunner.runMongod({
config: "jstests/noPassthrough/libs/max_conns_override_config.yaml",
});
// Get serverStatus to check that we have the right number of threads in the right places
function getStats() {
return assert.commandWorked(conn.getDB("admin").runCommand({serverStatus: 1}));
}
function verifyStats({exemptCount, normalCount}) {
const totalCount = exemptCount + normalCount;
// Verify that we have updated serverStatus.
assert.soon(() => {
const serverStatus = getStats();
const executors = serverStatus.network.serviceExecutors;
const currentCount = serverStatus.connections.current;
if (currentCount != totalCount) {
print(`Not yet at the expected count of connections: ${currentCount} != ${totalCount}`);
return false;
}
const readyAdminThreads =
executors.reserved.threadsRunning - executors.reserved.clientsRunning;
if (readyAdminThreads < configuredReadyAdminThreads) {
print("Not enough admin threads yet: " +
`${readyAdminThreads} < ${configuredReadyAdminThreads}`);
return false;
}
const threadedCount = serverStatus.connections.threaded;
const threadedExecutorCount =
executors.passthrough.clientsInTotal + executors.reserved.clientsInTotal;
if (threadedCount != threadedExecutorCount) {
print("Not enough running threaded clients yet: " +
`${threadedCount} != ${threadedExecutorCount}`);
return false;
}
const totalExecutorCount = threadedExecutorCount + executors.fixed.clientsInTotal;
if (totalCount != totalExecutorCount) {
print(`Not enough running clients yet: ${totalCount} != ${totalExecutorCount}`);
return false;
}
return true;
}, "Failed to verify initial conditions", 10000);
const serverStatus = getStats();
const connectionsStatus = serverStatus.connections;
const reservedExecutorStatus = serverStatus.network.serviceExecutors.reserved;
const fixedExecutorStatus = serverStatus.network.serviceExecutors.fixed;
const executorStatus = serverStatus.network.serviceExecutors.passthrough;
// Log these serverStatus sections so we can debug this easily.
const filteredSections = {
connections: connectionsStatus,
network: {
serviceExecutors: {
passthrough: executorStatus,
fixed: fixedExecutorStatus,
reserved: reservedExecutorStatus
}
}
};
print(`serverStatus: ${tojson(filteredSections)}`);
if (totalCount > configuredMaxConns) {
// If we're over maxConns, there are no available connections.
assert.lte(connectionsStatus["available"], -1);
} else {
assert.eq(connectionsStatus["available"], configuredMaxConns - totalCount);
}
// All connections on an exempt CIDR should be marked as limitExempt.
assert.eq(connectionsStatus["limitExempt"], exemptCount);
// The normal serviceExecutor should only be running at most maxConns number of threads.
assert.lte(executorStatus["threadsRunning"], configuredMaxConns);
// Clients on the normal executor own their thread and cannot wait asynchronously.
assert.eq(executorStatus["clientsRunning"], executorStatus["clientsInTotal"]);
assert.lte(executorStatus["clientsRunning"], executorStatus["threadsRunning"]);
assert.eq(executorStatus["clientsWaitingForData"], 0);
// Clients on the reserved executor run on a thread and cannot wait asynchronously.
assert.eq(reservedExecutorStatus["clientsRunning"], reservedExecutorStatus["clientsInTotal"]);
assert.lte(reservedExecutorStatus["clientsRunning"], reservedExecutorStatus["threadsRunning"]);
assert.eq(reservedExecutorStatus["clientsWaitingForData"], 0);
// Clients on the fixed executor borrow one thread and can wait asynchronously
assert.lte(fixedExecutorStatus["clientsRunning"], fixedExecutorStatus["clientsInTotal"]);
assert.lte(fixedExecutorStatus["clientsRunning"], fixedExecutorStatus["threadsRunning"]);
assert.lte(fixedExecutorStatus["clientsWaitingForData"], fixedExecutorStatus["clientsInTotal"]);
}
// Use the external ip to avoid our exempt CIDR.
let ip = get_ipaddr();
try {
let adminConns = [];
let normalConns = [];
// We start with one exempt control socket.
let exemptCount = 1;
let normalCount = 0;
// Do an initial verification.
verifyStats({exemptCount: exemptCount, normalCount: normalCount});
for (let i = 0; i < 2 * configuredMaxConns; i++) {
// Make some connections using the exempt CIDR and some using the normal CIDR.
let isExempt = (i % 2 == 0);
try {
if (isExempt) {
adminConns.push(new Mongo(`127.0.0.1:${conn.port}`));
++exemptCount;
} else {
normalConns.push(new Mongo(`${ip}:${conn.port}`));
++normalCount;
}
} catch (e) {
print(e);
// If we couldn't connect, that means we've exceeded maxConns and we're using the normal
// CIDR.
assert(!isExempt);
assert(i >= configuredMaxConns);
}
verifyStats({exemptCount: exemptCount, normalCount: normalCount});
}
// Some common sense assertions around what was admitted.
assert.eq(exemptCount, configuredMaxConns + 1);
assert.lte(normalCount, configuredMaxConns);
// Destroy all admin connections and verify assumptions.
while (adminConns.length) {
adminConns.pop().close();
--exemptCount;
verifyStats({exemptCount: exemptCount, normalCount: normalCount});
}
// Destroy all normal connections and verify assumptions.
while (normalConns.length) {
normalConns.pop().close();
--normalCount;
verifyStats({exemptCount: exemptCount, normalCount: normalCount});
}
} finally {
MongoRunner.stopMongod(conn);
}
})();
|
