mirror of https://github.com/mongodb/mongo
82 lines
3.0 KiB
JavaScript
82 lines
3.0 KiB
JavaScript
// ensure removing a chained node does not break reporting of replication progress (SERVER-15849)
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import {ReplSetTest} from "jstests/libs/replsettest.js";
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import {syncFrom} from "jstests/replsets/rslib.js";
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let numNodes = 5;
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let host = getHostName();
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let name = "chaining_removal";
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let replTest = new ReplSetTest({name: name, nodes: numNodes});
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let nodes = replTest.startSet();
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let port = replTest.ports;
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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].host, priority: 3},
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{_id: 1, host: nodes[1].host, priority: 0},
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{_id: 2, host: nodes[2].host, priority: 0},
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{_id: 3, host: nodes[3].host, priority: 0},
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{_id: 4, host: nodes[4].host, priority: 0},
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],
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});
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replTest.awaitNodesAgreeOnPrimary(replTest.timeoutMS, nodes, nodes[0]);
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let primary = replTest.getPrimary();
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// The default WC is majority and stopServerReplication could prevent satisfying any majority
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// writes.
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assert.commandWorked(
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primary.adminCommand({setDefaultRWConcern: 1, defaultWriteConcern: {w: 1}, writeConcern: {w: "majority"}}),
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);
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replTest.awaitReplication();
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// When setting up chaining on slow machines, we do not want slow writes or delayed heartbeats
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// to cause our nodes to invalidate the sync source provided in the 'replSetSyncFrom' command.
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// To achieve this, we disable the server parameter 'maxSyncSourceLagSecs' (see
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// repl_settings_init.cpp and TopologyCoordinatorImpl::Options) in
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// TopologyCoordinatorImpl::shouldChangeSyncSource().
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assert.commandWorked(
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nodes[1].getDB("admin").runCommand({configureFailPoint: "disableMaxSyncSourceLagSecs", mode: "alwaysOn"}),
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);
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assert.commandWorked(
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nodes[4].getDB("admin").runCommand({configureFailPoint: "disableMaxSyncSourceLagSecs", mode: "alwaysOn"}),
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);
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// Force node 1 to sync directly from node 0.
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syncFrom(nodes[1], nodes[0], replTest);
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// Force node 4 to sync through node 1.
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syncFrom(nodes[4], nodes[1], replTest);
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// write that should reach all nodes
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let timeout = ReplSetTest.kDefaultTimeoutMS;
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let options = {writeConcern: {w: numNodes, wtimeout: timeout}};
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assert.commandWorked(primary.getDB(name).foo.insert({x: 1}, options));
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// Re-enable 'maxSyncSourceLagSecs' checking on sync source.
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assert.commandWorked(
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nodes[1].getDB("admin").runCommand({configureFailPoint: "disableMaxSyncSourceLagSecs", mode: "off"}),
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);
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assert.commandWorked(
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nodes[4].getDB("admin").runCommand({configureFailPoint: "disableMaxSyncSourceLagSecs", mode: "off"}),
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);
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let config = primary.getDB("local").system.replset.findOne();
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config.members.pop();
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config.version++;
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// remove node 4
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replTest.stop(4);
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try {
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primary.adminCommand({replSetReconfig: config});
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} catch (e) {
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print("error: " + e);
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}
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// ensure writing to all four nodes still works
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primary = replTest.getPrimary();
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const liveSecondaries = [nodes[1], nodes[2], nodes[3]];
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replTest.awaitReplication(null, null, liveSecondaries);
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options.writeConcern.w = 4;
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assert.commandWorked(primary.getDB(name).foo.insert({x: 2}, options));
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replTest.stopSet();
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