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//
// Tests what happens when a replica set primary goes down with pooled connections.
//
(function() {
"use strict";
load("jstests/replsets/rslib.js");
var st = new ShardingTest({shards: {rs0: {nodes: 2}}, mongos: 1});
// Stop balancer to eliminate weird conn stuff
st.stopBalancer();
var mongos = st.s0;
var coll = mongos.getCollection("foo.bar");
var db = coll.getDB();
// Test is not valid for Win32
var is32Bits = (db.serverBuildInfo().bits == 32);
if (is32Bits && _isWindows()) {
// Win32 doesn't provide the polling interface we need to implement the check tested here
jsTest.log("Test is not valid on Win32 platform.");
} else {
// Non-Win32 platform
var primary = st.rs0.getPrimary();
var secondary = st.rs0.getSecondary();
jsTest.log("Creating new connections...");
// Create a bunch of connections to the primary node through mongos.
// jstest ->(x10)-> mongos ->(x10)-> primary
var conns = [];
for (var i = 0; i < 50; i++) {
conns.push(new Mongo(mongos.host));
conns[i].getCollection(coll + "").findOne();
}
jsTest.log("Returning the connections back to the pool.");
for (var i = 0; i < conns.length; i++) {
conns[i] = null;
}
// Make sure we return connections back to the pool
gc();
// Don't make test fragile by linking to format of shardConnPoolStats, but this is useful if
// something goes wrong.
var connPoolStats = mongos.getDB("admin").runCommand({shardConnPoolStats: 1});
printjson(connPoolStats);
jsTest.log("Stepdown primary and then step back up...");
var stepDown = function(node, timeSecs) {
assert.commandWorked(
node.getDB("admin").runCommand({replSetStepDown: timeSecs, force: true}));
};
stepDown(primary, 0);
jsTest.log("Waiting for mongos to acknowledge stepdown...");
awaitRSClientHosts(mongos,
secondary,
{ismaster: true},
st.rs0,
2 * 60 * 1000); // slow hosts can take longer to recognize sd
jsTest.log("Stepping back up...");
stepDown(secondary, 10000);
jsTest.log("Waiting for mongos to acknowledge step up...");
awaitRSClientHosts(mongos, primary, {ismaster: true}, st.rs0, 2 * 60 * 1000);
jsTest.log("Waiting for socket timeout time...");
// Need to wait longer than the socket polling time.
sleep(2 * 5000);
jsTest.log("Run queries using new connections.");
var numErrors = 0;
for (var i = 0; i < conns.length; i++) {
var newConn = new Mongo(mongos.host);
try {
printjson(newConn.getCollection("foo.bar").findOne());
} catch (e) {
printjson(e);
numErrors++;
}
}
assert.eq(0, numErrors);
} // End Win32 check
jsTest.log("DONE!");
st.stop();
}());
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