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/**
* Test basic read committed maxTimeMS timeout while waiting for a committed snapshot:
* - Reads with an 'afterOpTime' snapshot >= current time should be able to see things that
* happened before or at that opTime.
* - Reads should time out if there are no snapshots available on secondary.
*/
load("jstests/replsets/rslib.js"); // For reconfig and startSetIfSupportsReadMajority.
(function() {
"use strict";
// Set up a set and grab things for later.
var name = "read_committed_no_snapshots";
var replTest = new ReplSetTest({
name: name,
nodes: [
{},
{rsConfig: {priority: 0}},
{
setParameter: {"failpoint.disableSnapshotting": "{'mode':'alwaysOn'}"},
rsConfig: {priority: 0}
}
],
nodeOptions: {enableMajorityReadConcern: ''},
settings: {protocolVersion: 1}
});
if (!startSetIfSupportsReadMajority(replTest)) {
jsTest.log("skipping test since storage engine doesn't support committed reads");
replTest.stopSet();
return;
}
// Cannot wait for a stable checkpoint due to the no-snapshot secondary.
replTest.initiateWithAnyNodeAsPrimary(
null, "replSetInitiate", {doNotWaitForStableCheckpoint: true});
// Get connections and collection.
var primary = replTest.getPrimary();
var healthySecondary = replTest._slaves[0];
healthySecondary.setSlaveOk();
var noSnapshotSecondary = replTest._slaves[1];
noSnapshotSecondary.setSlaveOk();
// Do a write, wait for it to replicate, and ensure it is visible.
var res = primary.getDB(name).runCommandWithMetadata( //
{
insert: "foo",
documents: [{_id: 1, state: 0}],
writeConcern: {w: "majority", wtimeout: ReplSetTest.kDefaultTimeoutMS}
},
{"$replData": 1});
assert.commandWorked(res.commandReply);
// We need to propagate the lastOpVisible from the primary as afterOpTime in the secondaries to
// ensure we wait for the write to be in the majority committed view.
var lastOp = res.metadata["$replData"].lastOpVisible;
// Timeout is based on heartbeat timeout.
assert.commandWorked(healthySecondary.getDB(name).foo.runCommand(
'find',
{"readConcern": {"level": "majority", "afterOpTime": lastOp}, "maxTimeMS": 10 * 1000}));
// Ensure maxTimeMS times out while waiting for this snapshot
assert.commandFailedWithCode(
noSnapshotSecondary.getDB(name).foo.runCommand(
'find', {"readConcern": {"level": "majority"}, "maxTimeMS": 1000}),
ErrorCodes.MaxTimeMSExpired);
// Reconfig to make the no-snapshot secondary the primary
var config = primary.getDB("local").system.replset.findOne();
config.members[0].priority = 0;
config.members[2].priority = 1;
config.version++;
primary = reconfig(replTest, config, true);
// Ensure maxTimeMS times out while waiting for this snapshot
assert.commandFailedWithCode(
primary.getSiblingDB(name).foo.runCommand(
'find', {"readConcern": {"level": "majority"}, "maxTimeMS": 1000}),
ErrorCodes.MaxTimeMSExpired);
replTest.stopSet();
})();
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