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/**
* Tests that arbiters cannot be used to acknowledge w:number writes even when some of the
* required secondaries are unavailable. After a write commits, the corresponding
* lastCommittedOpTime becomes the lastAppliedOpTime on arbiters in the set. This particular test
* uses a PSSAA set where both of the secondaries are non-voting, which makes the majority only one
* node. The effect of this configuration is that writes only need to be on the primary to commit.
* A w:2 write would thus require only one additional member to fully satisfy the write concern
* after committing. This test therefore shuts down both secondaries and verifies that neither of
* the arbiters gets picked in its place and the w:2 write times out instead.
*/
(function() {
"use strict";
const name = "arbiters_not_included_in_w2_wc";
const rst = new ReplSetTest({name: name, nodes: 5});
const nodes = rst.nodeList();
rst.startSet();
rst.initiate({
"_id": name,
"members": [
{"_id": 0, "host": nodes[0]},
{"_id": 1, "host": nodes[1], priority: 0, votes: 0},
{"_id": 2, "host": nodes[2], priority: 0, votes: 0},
{"_id": 3, "host": nodes[3], "arbiterOnly": true},
{"_id": 4, "host": nodes[4], "arbiterOnly": true}
]
});
const dbName = "test";
const collName = name;
const primary = rst.getPrimary();
const testDB = primary.getDB(dbName);
const testColl = testDB.getCollection(collName);
assert.writeOK(testColl.insert({"a": 1}, {writeConcern: {w: 2}}));
jsTestLog("Shutting down both secondaries");
rst.stop(1);
rst.stop(2);
jsTestLog("Issuing a w:2 write and confirming that it times out");
const res = testDB.runCommand(
{insert: collName, documents: [{"b": 2}], writeConcern: {w: 2, wtimeout: 5 * 1000}});
assert.commandWorked(res); // Commands with write concern errors still report success.
assert(res.writeConcernError);
assert.eq(ErrorCodes.WriteConcernFailed, res.writeConcernError.code);
rst.stopSet();
})();
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