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// test that a rollback of collMod altering TTL will cause the node to go into a FATAL state
//
// 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]
// set up a set and grab things for later
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, 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};
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 ] });
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