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// ensure removing a chained node does not break reporting of replication progress (SERVER-15849)
(function() {
"use strict";
var numNodes = 5;
var host = getHostName();
var name = "chaining_removal";
var replTest = new ReplSetTest({name: name, nodes: numNodes});
var nodes = replTest.startSet();
var port = replTest.ports;
replTest.initiate({
_id: name,
members: [
{_id: 0, host: nodes[0].host, priority: 3},
{_id: 1, host: nodes[1].host, priority: 0},
{_id: 2, host: nodes[2].host, priority: 0},
{_id: 3, host: nodes[3].host, priority: 0},
{_id: 4, host: nodes[4].host, priority: 0},
],
});
replTest.waitForState(nodes[0], ReplSetTest.State.PRIMARY);
replTest.awaitNodesAgreeOnPrimary();
var primary = replTest.getPrimary();
replTest.awaitReplication();
// Force node 1 to sync directly from node 0.
assert.commandWorked(nodes[1].getDB("admin").runCommand({"replSetSyncFrom": nodes[0].host}));
var res;
assert.soon(
function() {
res = nodes[1].getDB("admin").runCommand({"replSetGetStatus": 1});
return res.syncingTo === nodes[0].host;
},
function() {
return "node 1 failed to start syncing from node 0: " + tojson(res);
});
// Force node 4 to sync through node 1.
assert.commandWorked(nodes[4].getDB("admin").runCommand({"replSetSyncFrom": nodes[1].host}));
assert.soon(
function() {
res = nodes[4].getDB("admin").runCommand({"replSetGetStatus": 1});
return res.syncingTo === nodes[1].host;
},
function() {
return "node 4 failed to start chaining through node 1: " + tojson(res);
});
// write that should reach all nodes
var timeout = 60 * 1000;
var options = {writeConcern: {w: numNodes, wtimeout: timeout}};
assert.writeOK(primary.getDB(name).foo.insert({x: 1}, options));
var config = primary.getDB("local").system.replset.findOne();
config.members.pop();
config.version++;
// remove node 4
replTest.stop(4);
try {
primary.adminCommand({replSetReconfig: config});
} catch (e) {
print("error: " + e);
}
// ensure writing to all four nodes still works
primary = replTest.getPrimary();
replTest.awaitReplication();
options.writeConcern.w = 4;
assert.writeOK(primary.getDB(name).foo.insert({x: 2}, options));
replTest.stopSet();
}());
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