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// Tests serverStatus tracking of connections opened
var testDB = 'connectionsOpenedTest';
var signalCollection = 'keepRunning';
function createPersistentConnection() {
return new Mongo(db.getMongo().host);
}
function createTemporaryConnection() {
// Creates a connection by spawing a shell that polls the signal collection until it is told to
// terminate.
var pollString = "assert.soon(function() {"
+ "return db.getSiblingDB('" + testDB + "').getCollection('" + signalCollection + "')"
+ ".findOne().stop;}, \"Parallel shell never told to terminate\", 10 * 60000);";
return startParallelShell(pollString);
}
function waitForConnections(expectedCurrentConnections, expectedTotalConnections) {
assert.soon(function() {
currentConnInfo = db.serverStatus().connections;
return (expectedCurrentConnections == currentConnInfo.current) &&
(expectedTotalConnections, currentConnInfo.totalCreated);
},
{toString: function() {
return "Incorrect connection numbers. Expected " + expectedCurrentConnections +
" current connections and " + expectedTotalConnections + " total" +
" connections. Connection info from serverStatus: " +
tojson(db.serverStatus().connections); } },
5 * 60000);
}
var originalConnInfo = db.serverStatus().connections;
assert.gt(originalConnInfo.current, 0);
assert.gt(originalConnInfo.totalCreated, 0);
jsTestLog("Creating persistent connections");
var permConns = [];
for (var i = 0; i < 100; i++) {
permConns.push(createPersistentConnection());
}
jsTestLog("Testing that persistent connections increased the current and totalCreated counters");
waitForConnections(originalConnInfo.current + 100, originalConnInfo.totalCreated + 100);
jsTestLog("Creating temporary connections");
db.getSiblingDB(testDB).dropDatabase();
db.getSiblingDB(testDB).getCollection(signalCollection).insert({stop:false});
var tempConns = [];
for (var i = 0; i < 100; i++) {
tempConns.push(createTemporaryConnection());
}
jsTestLog("Testing that temporary connections increased the current and totalCreated counters");
waitForConnections(originalConnInfo.current + 200, originalConnInfo.totalCreated + 200);
jsTestLog("Waiting for all temporary connections to be closed");
// Notify waiting parallel shells to terminate, causing the connection count to go back down.
db.getSiblingDB(testDB).getCollection(signalCollection).update({}, {$set : {stop:true}});
for (var i = 0; i < tempConns.length; i++) {
tempConns[i](); // wait on parallel shell to terminate
}
jsTestLog("Testing that current connections counter went down after temporary connections closed");
waitForConnections(originalConnInfo.current + 100, originalConnInfo.totalCreated + 200);
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