edc3dfce51
The updates_in_heterogeneous_repl_set.js test wants to call stepUp() on each of its replica set members to ensure that each one gets an opportunity to handle inserts and updates. However, we found that the stepUp()-triggered election was occasionally failing, because even though a call to awaitReplication() ensured that all members were caught up on their oplogs, some members were not aware that their peers were caught up. The new awaitNodesAgreeOnOpTime() function uses an assert.soon() to wait until all the members are caught up on their peers' status, so that the election always succeeds.
75 lines
2.8 KiB
JavaScript
75 lines
2.8 KiB
JavaScript
// Create a replica set with feature compatibility version set to 3.4, add a
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// binVersion 3.4 member, and then update documents with each member as the
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// primary. Finally, upgrade the 3.4 member to 3.6, upgrade the replica set to
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// feature compatibility version 3.6, and again update documents with each
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// member as the primary.
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const testName = "updates_in_heterogeneous_repl_set";
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(function() {
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"use strict";
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// Initialize the binVersion 3.6 versions of the replica set.
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let replTest =
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new ReplSetTest({name: testName, nodes: [{binVersion: "latest"}, {binVersion: "latest"}]});
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replTest.startSet();
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replTest.initiate();
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let primary = replTest.getPrimary();
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// Set the feature compatibility version to 3.4.
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assert.commandWorked(primary.adminCommand({setFeatureCompatibilityVersion: "3.4"}));
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// Add the binVersion 3.4 member fo the replica set.
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let binVersion34Node = replTest.add({binVersion: "3.4"});
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replTest.reInitiate();
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replTest.awaitSecondaryNodes();
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// Give each member a chance to be primary while updating documents.
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let collIndex = 0;
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replTest.nodes.forEach(function(node) {
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replTest.stepUp(node);
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let coll = node.getDB("test")["coll" + (collIndex++)];
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for (let id = 0; id < 1000; id++) {
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assert.writeOK(coll.insert({_id: id}));
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assert.writeOK(coll.update({_id: id}, {$set: {z: 1, a: 2}}));
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// Because we are using the update system from earlier MongodDB
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// versions (as a result of using feature compatibility version
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// 3.4), we expect to see the new 'z' and 'a' fields to get added in
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// the same order as they appeared in the update document.
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assert.eq(coll.findOne({_id: id}), {_id: id, z: 1, a: 2});
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}
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});
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// Upgrade the binVersion 3.4 member to binVersion 3.6.
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replTest.restart(binVersion34Node, {binVersion: "latest"});
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replTest.awaitSecondaryNodes();
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// Set the replica set feature compatibility version to 3.6.
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primary = replTest.getPrimary();
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assert.commandWorked(primary.adminCommand({setFeatureCompatibilityVersion: "3.6"}));
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// Again, give each member a chance to be primary while updating documents.
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replTest.nodes.forEach(function(node) {
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replTest.stepUp(node);
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let coll = node.getDB("test")["coll" + (collIndex++)];
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for (let id = 0; id < 1000; id++) {
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assert.writeOK(coll.insert({_id: id}));
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assert.writeOK(coll.update({_id: id}, {$set: {z: 1, a: 2}}));
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// We can tell that we are using the new 3.6 update system, because
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// it inserts new fields in lexicographic order, causing the 'a' and
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// 'z' fields to be swapped.
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assert.eq(coll.findOne({_id: id}), {_id: id, a: 2, z: 1});
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}
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});
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replTest.stopSet();
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})();
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