var name = "rollback_collMod_fatal";
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);

// 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};
a_conn.getDB(name).foo.ensureIndex({x: 1}, {expireAfterSeconds: 3600});
assert.writeOK(a_conn.getDB(name).foo.insert({x: 1}, options));

// shut down master
replTest.stop(AID);

// do a collMod altering TTL which should cause FATAL when rolled back
master = replTest.getPrimary();
assert(b_conn.host === master.host, "b_conn assumed to be master");
assert.commandWorked(b_conn.getDB(name).runCommand(
    {collMod: "foo", index: {keyPattern: {x: 1}, expireAfterSeconds: 10}}));

// 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 attempt rollback but then fassert
clearRawMongoProgramOutput();
replTest.restart(BID);
assert.soon(function() {
    return rawMongoProgramOutput().match("cannot rollback a collMod command");
}, "B failed to fassert");

replTest.stopSet(undefined, undefined, {allowedExitCodes: [MongoRunner.EXIT_ABRUPT]});
