c078dc37a9
This is just a cleanup work to hide some of the private state of ReplSetTest so it is easier to encapsulate and add new logic. Also enables strict mode.
79 lines
2.5 KiB
JavaScript
79 lines
2.5 KiB
JavaScript
/**
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* This checks rollback, which shouldn't happen unless we have reached minvalid.
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* 1. make 3-member set w/arb (2)
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* 2. shut down slave
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* 3. do writes to master
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* 4. modify master's minvalid
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* 5. shut down master
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* 6. start up slave
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* 7. writes on former slave (now primary)
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* 8. start up master
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* 9. check master does not rollback
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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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print("1. make 3-member set w/arb (2)");
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var name = "minvalid"
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var replTest = new ReplSetTest({name: name, nodes: 3, oplogSize:1});
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var host = getHostName();
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var nodes = replTest.startSet();
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replTest.initiate({_id : name, members : [
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{_id : 0, host : host+":"+replTest.ports[0]},
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{_id : 1, host : host+":"+replTest.ports[1]},
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{_id : 2, host : host+":"+replTest.ports[2], arbiterOnly : true}
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]});
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var slaves = replTest.liveNodes.slaves;
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var master = replTest.getPrimary();
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var masterId = replTest.getNodeId(master);
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var slave = slaves[0];
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var slaveId = replTest.getNodeId(slave);
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var mdb = master.getDB("foo");
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mdb.foo.save({a: 1000});
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replTest.awaitReplication();
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print("2: shut down slave");
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replTest.stop(slaveId);
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print("3: write to master");
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assert.writeOK(mdb.foo.insert({a: 1001}, { writeConcern: { w: 1 } }));
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print("4: modify master's minvalid");
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var local = master.getDB("local");
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var lastOp = local.oplog.rs.find().sort({$natural:-1}).limit(1).next();
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printjson(lastOp);
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// Overwrite minvalid document to simulate an inconsistent state (as might result from a server
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// crash.
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local.replset.minvalid.update({},{ ts:new Timestamp(lastOp.ts.t, lastOp.ts.i+1) }, {upsert: true});
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printjson(local.replset.minvalid.findOne());
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print("5: shut down master");
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replTest.stop(masterId);
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print("6: start up slave");
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replTest.restart(slaveId);
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print("7: writes on former slave")
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master = replTest.getPrimary();
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mdb1 = master.getDB("foo");
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mdb1.foo.save({a:1002});
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print("8: start up former master");
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clearRawMongoProgramOutput();
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replTest.restart(masterId);
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print("9: check former master does not roll back");
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assert.soon(function(){
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return rawMongoProgramOutput().match("need to rollback, but in inconsistent state");
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});
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replTest.stopSet(15);
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