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.
69 lines
2.4 KiB
JavaScript
69 lines
2.4 KiB
JavaScript
load("jstests/replsets/rslib.js");
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// Tests that the replica set's term increases once per election, and persists across a restart of
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// the entire set.
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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 replica set configuration document after a restart,
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// so cannot elect a primary. This test induces such a scenario, so cannot be run on ephemeral
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// storage engines.
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// @tags: [requires_persistence]
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(function() {
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"use strict";
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function getCurrentTerm(primary) {
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var res = primary.adminCommand({replSetGetStatus: 1});
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assert.commandWorked(res);
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return res.term;
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}
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var name = "restore_term";
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var rst = new ReplSetTest({name: name, nodes: 2});
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rst.startSet();
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// Initiate the replset in protocol version 1.
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var conf = rst.getReplSetConfig();
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conf.settings = conf.settings || { };
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conf.settings.electionTimeoutMillis = 2000;
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conf.protocolVersion = 1;
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rst.initiate(conf);
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rst.awaitSecondaryNodes();
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var primary = rst.getPrimary();
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var primaryColl = primary.getDB("test").coll;
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// Current term may be greater than 1 if election race happens.
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var firstSuccessfulTerm = getCurrentTerm(primary);
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assert.gte(firstSuccessfulTerm, 1);
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assert.writeOK(primaryColl.insert({x: 1}, {writeConcern: {w: "majority"}}));
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assert.eq(getCurrentTerm(primary), firstSuccessfulTerm);
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// Check that the insert op has the initial term.
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var latestOp = getLatestOp(primary);
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assert.eq(latestOp.op, "i");
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assert.eq(latestOp.t, firstSuccessfulTerm);
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// Step down to increase the term.
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try {
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var res = primary.adminCommand({replSetStepDown: 0});
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} catch (err) {
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print("caught: " + err + " on stepdown");
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}
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rst.awaitSecondaryNodes();
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// The secondary became the new primary now with a higher term.
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// Since there's only one secondary who may run for election, the new term is higher by 1.
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assert.eq(getCurrentTerm(rst.getPrimary()), firstSuccessfulTerm + 1);
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// Restart the replset and verify the term is the same.
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rst.stopSet(null /* signal */, true /* forRestart */);
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rst.startSet({restart: true});
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rst.awaitSecondaryNodes();
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primary = rst.getPrimary();
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assert.eq(primary.getDB("test").coll.find().itcount(), 1);
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// After restart, the new primary stands up with the newer term.
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assert.gte(getCurrentTerm(primary), firstSuccessfulTerm + 1);
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})();
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