6745d91683
Makes all JS tests access the replica set member state from the class itself instead of the object instance. Also removes some unused code.
85 lines
3.2 KiB
JavaScript
85 lines
3.2 KiB
JavaScript
// test that a rollback of an update with empty o2 causes a message to be logged
|
|
//
|
|
// If all data-bearing nodes in a replica set are using an ephemeral storage engine, the set will
|
|
// not be able to survive a scenario where all data-bearing nodes are down simultaneously. In such a
|
|
// scenario, none of the members will have any data, and upon restart will each look for a member to
|
|
// inital sync from, so no primary will be elected. This test induces such a scenario, so cannot be
|
|
// run on ephemeral storage engines.
|
|
// @tags: [requires_persistence]
|
|
|
|
// function to check the logs for an entry
|
|
doesEntryMatch = function(array, regex) {
|
|
var found = false;
|
|
for (i = 0; i < array.length; i++) {
|
|
if (regex.test(array[i])) {
|
|
found = true;
|
|
}
|
|
}
|
|
return found;
|
|
}
|
|
|
|
// set up a set and grab things for later
|
|
var name = "rollback_empty_o2";
|
|
var replTest = new ReplSetTest({name: name, nodes: 3});
|
|
var nodes = replTest.nodeList();
|
|
var conns = replTest.startSet();
|
|
replTest.initiate({"_id": name,
|
|
"members": [
|
|
{ "_id": 0, "host": nodes[0], priority: 3 },
|
|
{ "_id": 1, "host": nodes[1] },
|
|
{ "_id": 2, "host": nodes[2], arbiterOnly: true}]
|
|
});
|
|
var a_conn = conns[0];
|
|
var b_conn = conns[1];
|
|
var AID = replTest.getNodeId(a_conn);
|
|
var BID = replTest.getNodeId(b_conn);
|
|
|
|
replTest.waitForState(replTest.nodes[0], ReplSetTest.State.PRIMARY, 60 * 1000);
|
|
|
|
// get master and do an initial write
|
|
var master = replTest.getPrimary();
|
|
assert(master === conns[0], "conns[0] assumed to be master");
|
|
assert(a_conn.host === master.host, "a_conn assumed to be master");
|
|
var options = {writeConcern: {w: 2, wtimeout: 60000}, upsert: true};
|
|
assert.writeOK(a_conn.getDB(name).foo.insert({x: 1}, options));
|
|
|
|
// shut down master
|
|
replTest.stop(AID);
|
|
|
|
// insert a fake oplog entry with an empty o2
|
|
master = replTest.getPrimary();
|
|
assert(b_conn.host === master.host, "b_conn assumed to be master");
|
|
options = {writeConcern: {w: 1, wtimeout: 60000}, upsert: true};
|
|
// another insert to set minvalid ahead
|
|
assert.writeOK(b_conn.getDB(name).foo.insert({x: 123}));
|
|
var oplog_entry = b_conn.getDB("local").oplog.rs.find().sort({$natural: -1})[0];
|
|
oplog_entry["ts"] = Timestamp(oplog_entry["ts"].t, oplog_entry["ts"].i + 1);
|
|
oplog_entry["op"] = "u";
|
|
oplog_entry["o2"] = {};
|
|
assert.writeOK(b_conn.getDB("local").oplog.rs.insert(oplog_entry));
|
|
|
|
// shut down B and bring back the original master
|
|
replTest.stop(BID);
|
|
replTest.restart(AID);
|
|
master = replTest.getPrimary();
|
|
assert(a_conn.host === master.host, "a_conn assumed to be master");
|
|
|
|
// do a write so that B will have to roll back
|
|
options = {writeConcern: {w: 1, wtimeout: 60000}, upsert: true};
|
|
assert.writeOK(a_conn.getDB(name).foo.insert({x: 2}, options));
|
|
|
|
// restart B, which should rollback and log a message about not rolling back empty o2'd oplog entry
|
|
replTest.restart(BID);
|
|
var msg = RegExp("ignoring op on rollback : ");
|
|
assert.soon(function() {
|
|
try {
|
|
var log = b_conn.getDB("admin").adminCommand({getLog: "global"}).log;
|
|
return doesEntryMatch(log, msg);
|
|
}
|
|
catch (e) {
|
|
return false;
|
|
}
|
|
}, "Did not see a log entry about skipping the empty o2'd oplog entry during rollback");
|
|
|
|
replTest.stopSet();
|