85 lines
3.3 KiB
JavaScript
85 lines
3.3 KiB
JavaScript
/**
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* Test that a rollback of a non-rollbackable command causes a message to be logged
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*
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* If all data-bearing nodes in a replica set are using an ephemeral storage engine, the set will
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* not be able to survive a scenario where all data-bearing nodes are down simultaneously. In such a
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* scenario, none of the members will have any data, and upon restart will each look for a member to
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* initial sync from, so no primary will be elected. This test induces such a scenario, so cannot be
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* run on ephemeral storage engines.
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* @tags: [requires_persistence]
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*/
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// Sets up a replica set and grabs things for later.
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var name = "rollback_cmd_unrollbackable";
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var replTest = new ReplSetTest({name: name, nodes: 3});
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var nodes = replTest.nodeList();
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var conns = replTest.startSet();
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replTest.initiate({
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"_id": name,
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"members": [
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{"_id": 0, "host": nodes[0], priority: 3},
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{"_id": 1, "host": nodes[1]},
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{"_id": 2, "host": nodes[2], arbiterOnly: true}
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]
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});
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var a_conn = conns[0];
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var b_conn = conns[1];
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var AID = replTest.getNodeId(a_conn);
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var BID = replTest.getNodeId(b_conn);
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// Gets master and do an initial write.
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replTest.waitForState(replTest.nodes[0], ReplSetTest.State.PRIMARY);
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var master = replTest.getPrimary();
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assert(master === conns[0], "conns[0] assumed to be master");
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assert(a_conn.host === master.host, "a_conn assumed to be master");
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var options = {writeConcern: {w: 2, wtimeout: ReplSetTest.kDefaultTimeoutMS}, upsert: true};
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assert.writeOK(a_conn.getDB(name).foo.insert({x: 1}, options));
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// Shuts down the master.
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replTest.stop(AID);
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// Inserts a fake oplog entry with a non-rollbackworthy command.
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master = replTest.getPrimary();
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assert(b_conn.host === master.host, "b_conn assumed to be master");
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options = {
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writeConcern: {w: 1, wtimeout: ReplSetTest.kDefaultTimeoutMS},
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upsert: true
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};
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// Inserts another oplog entry to set minValid ahead.
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assert.writeOK(b_conn.getDB(name).foo.insert({x: 123}));
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var oplog_entry = b_conn.getDB("local").oplog.rs.find().sort({$natural: -1})[0];
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oplog_entry["ts"] = Timestamp(oplog_entry["ts"].t, oplog_entry["ts"].i + 1);
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oplog_entry["op"] = "c";
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oplog_entry["o"] = {
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"emptycapped": 1
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};
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assert.writeOK(b_conn.getDB("local").oplog.rs.insert(oplog_entry));
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// Shuts down B and brings back the original master.
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replTest.stop(BID);
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replTest.restart(AID);
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master = replTest.getPrimary();
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assert(a_conn.host === master.host, "a_conn assumed to be master");
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// Does a write so that B will have to roll back.
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options = {
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writeConcern: {w: 1, wtimeout: ReplSetTest.kDefaultTimeoutMS},
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upsert: true
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};
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assert.writeOK(a_conn.getDB(name).foo.insert({x: 2}, options));
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// Restarts B, which should attempt to rollback but then fassert.
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jsTestLog("Restarting node B (" + b_conn.host + ") and waiting for it to fassert.");
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clearRawMongoProgramOutput();
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// Don't wait for a connection to the node after startup, since it might roll back and crash
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// immediately.
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replTest.start(BID, {waitForConnect: false}, true /*restart*/);
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var msg = RegExp("Can't roll back this command yet: ");
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assert.soon(function() {
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return rawMongoProgramOutput().match(msg);
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}, "Did not see a log entry about skipping the nonrollbackable command during rollback");
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replTest.stop(BID, undefined, {allowedExitCode: MongoRunner.EXIT_ABRUPT});
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replTest.stopSet();
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