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// Verifies the serverStatus output and FTDC output for the read write concern defaults.
//
// @tags: [requires_sharding]
(function() {
"use strict";
load("jstests/libs/ftdc.js");
// Verifies the transaction server status response has the fields that we expect.
function verifyServerStatus(conn,
{expectedRC, expectedWC, expectNoDefaultsDocument, expectNothing},
isImplicitDefaultWCMajority) {
const res = assert.commandWorked(conn.adminCommand({serverStatus: 1}));
if (expectNothing) {
assert.eq(undefined, res.defaultRWConcern, tojson(res.defaultRWConcern));
return;
}
assert.hasFields(res, ["defaultRWConcern"]);
const defaultsRes = res.defaultRWConcern;
assert.hasFields(defaultsRes, ["defaultReadConcernSource"]);
if (!expectedRC) {
assert.eq("implicit", defaultsRes.defaultReadConcernSource, tojson(defaultsRes));
expectedRC = {level: "local"};
} else {
assert.eq("global", defaultsRes.defaultReadConcernSource, tojson(defaultsRes));
}
if (expectedRC) {
assert.eq(expectedRC, defaultsRes.defaultReadConcern, tojson(defaultsRes));
} else {
assert.eq(undefined, defaultsRes.defaultReadConcern, tojson(defaultsRes));
}
assert.hasFields(defaultsRes, ["defaultWriteConcernSource"]);
if (!expectedWC) {
assert.eq("implicit", defaultsRes.defaultWriteConcernSource, tojson(defaultsRes));
if (isImplicitDefaultWCMajority) {
expectedWC = {w: "majority", wtimeout: 0};
}
} else {
assert.eq("global", defaultsRes.defaultWriteConcernSource, tojson(defaultsRes));
}
if (expectedWC) {
assert.eq(expectedWC, defaultsRes.defaultWriteConcern, tojson(defaultsRes));
} else {
assert.eq(undefined, defaultsRes.defaultWriteConcern, tojson(defaultsRes));
}
if (expectNoDefaultsDocument) {
// When defaults have never been set (or the defaults document was deleted) the response
// should only contain localUpdateWallClockTime.
assert.hasFields(defaultsRes, ["localUpdateWallClockTime"]);
assert.eq(undefined, defaultsRes.updateWallClockTime, tojson(defaultsRes));
assert.eq(undefined, defaultsRes.updateOpTime, tojson(defaultsRes));
} else {
// These fields are always set once a read or write concern has been set at least once and
// the defaults document is still present.
assert.hasFields(defaultsRes,
["updateOpTime", "updateWallClockTime", "localUpdateWallClockTime"]);
}
}
function testServerStatus(conn, isImplicitDefaultWCMajority) {
// When no defaults have been set.
verifyServerStatus(conn, {expectNoDefaultsDocument: true}, isImplicitDefaultWCMajority);
// When only read concern is set.
assert.commandWorked(
conn.adminCommand({setDefaultRWConcern: 1, defaultReadConcern: {level: "majority"}}));
verifyServerStatus(conn, {expectedRC: {level: "majority"}}, isImplicitDefaultWCMajority);
// When read concern is explicitly unset and write concern is unset.
assert.commandWorked(conn.adminCommand(
{setDefaultRWConcern: 1, defaultReadConcern: {}, defaultWriteConcern: {}}));
verifyServerStatus(conn, {}, isImplicitDefaultWCMajority);
// When only write concern is set.
assert.commandWorked(conn.adminCommand(
{setDefaultRWConcern: 1, defaultReadConcern: {}, defaultWriteConcern: {w: "majority"}}));
verifyServerStatus(
conn, {expectedWC: {w: "majority", wtimeout: 0}}, isImplicitDefaultWCMajority);
// When both read and write concern are set.
assert.commandWorked(conn.adminCommand({
setDefaultRWConcern: 1,
defaultReadConcern: {level: "majority"},
defaultWriteConcern: {w: "majority"}
}));
verifyServerStatus(conn,
{expectedRC: {level: "majority"}, expectedWC: {w: "majority", wtimeout: 0}},
isImplicitDefaultWCMajority);
// When the defaults document has been deleted.
assert.commandWorked(conn.getDB("config").settings.remove({_id: "ReadWriteConcernDefaults"}));
assert.soon(() => {
// Wait for the cache to discover the defaults were deleted. Note the cache is invalidated
// on delete on a mongod, so this is only to handle the mongos case.
const res = conn.adminCommand({getDefaultRWConcern: 1, inMemory: true});
return !res.hasOwnProperty("updateOpTime");
}, "mongos failed to pick up deleted default rwc", undefined, 1000, {runHangAnalyzer: false});
verifyServerStatus(conn, {expectNoDefaultsDocument: true}, isImplicitDefaultWCMajority);
}
function testFTDC(conn, ftdcDirPath, expectNothingOnRotation = false) {
//
// The periodic samples used for FTDC shouldn't include the default read write concerns.
//
const latestPeriodicFTDC = verifyGetDiagnosticData(conn.getDB("admin"));
assert.hasFields(latestPeriodicFTDC, ["serverStatus"]);
assert.eq(undefined,
latestPeriodicFTDC.serverStatus.defaultRWConcern,
tojson(latestPeriodicFTDC.serverStatus));
//
// The first sample in the FTDC file should have the default read write concern, if the node is
// expected to collect it on log file rotation.
//
const ftdcFiles = listFiles(ftdcDirPath);
// Read from the first non-interim file.
const firstFullFile =
ftdcFiles.filter(fileDesc => fileDesc.baseName.indexOf("interim") == -1)[0];
var ftdcData;
assert.soon(() => {
try {
ftdcData = _readDumpFile(firstFullFile.name);
return true;
} catch (error) {
jsTestLog(`Caught unexpected error: ${tojson(error)}`);
return false;
}
});
assert.hasFields(ftdcData[0], ["doc"], tojson(ftdcData));
// Look for the defaults in the first metadata object.
const firstMetadataObj = ftdcData.filter(obj => obj.type == 0)[0];
assert.hasFields(firstMetadataObj, ["doc"]);
if (expectNothingOnRotation) {
assert.eq(undefined, firstMetadataObj.doc.getDefaultRWConcern, tojson(ftdcData[0].doc));
} else {
assert.hasFields(firstMetadataObj.doc, ["getDefaultRWConcern"]);
}
}
jsTestLog("Testing sharded cluster...");
{
const testPathMongos = MongoRunner.toRealPath("ftdc_dir_mongos");
const testPathConfig = MongoRunner.toRealPath("ftdc_dir_config");
const testPathShard = MongoRunner.toRealPath("ftdc_dir_shard");
const st = new ShardingTest({
shards: [{setParameter: {diagnosticDataCollectionDirectoryPath: testPathShard}}],
mongos: {
s0: {setParameter: {diagnosticDataCollectionDirectoryPath: testPathMongos}},
},
config: 1,
configOptions: {setParameter: {diagnosticDataCollectionDirectoryPath: testPathConfig}}
});
testServerStatus(st.s, true /* isImplicitDefaultWCMajority */);
testFTDC(st.s, testPathMongos);
testServerStatus(st.configRS.getPrimary(), true /* isImplicitDefaultWCMajority */);
testFTDC(st.configRS.getPrimary(), testPathConfig);
// Set a default before verifying it isn't included by shards.
assert.commandWorked(
st.s.adminCommand({setDefaultRWConcern: 1, defaultWriteConcern: {w: "majority"}}));
verifyServerStatus(
st.rs0.getPrimary(), {expectNothing: true}, true /* isImplicitDefaultWCMajority */);
testFTDC(st.rs0.getPrimary(), testPathShard, true /* expectNothingOnRotation */);
st.stop();
}
jsTestLog("Testing plain replica set...");
{
const testPath = MongoRunner.toRealPath("ftdc_dir_repl_node");
const rst = new ReplSetTest(
{nodes: 1, nodeOptions: {setParameter: {diagnosticDataCollectionDirectoryPath: testPath}}});
rst.startSet();
rst.initiate();
testServerStatus(rst.getPrimary(), true /* isImplicitDefaultWCMajority */);
testFTDC(rst.getPrimary(), testPath);
rst.stopSet();
}
jsTestLog("Testing server status for plain replica set with implicit default WC {w:1}");
{
const rst = new ReplSetTest({nodes: [{}, {}, {arbiter: true}]});
rst.startSet();
rst.initiate();
testServerStatus(rst.getPrimary(), false /* isImplicitDefaultWCMajority */);
rst.stopSet();
}
jsTestLog("Testing standalone server...");
{
const testPath = MongoRunner.toRealPath("ftdc_dir_standalone");
const standalone =
MongoRunner.runMongod({setParameter: {diagnosticDataCollectionDirectoryPath: testPath}});
verifyServerStatus(standalone, {expectNothing: true}, true /* isImplicitDefaultWCMajority */);
testFTDC(standalone, testPath, true /* expectNothingOnRotation */);
MongoRunner.stopMongod(standalone);
}
}());
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