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'use strict';
/**
* Runs findAndModify, update, delete, find, and getMore within a transaction.
*
* @tags: [uses_transactions, state_functions_share_transaction]
*/
load('jstests/concurrency/fsm_workload_helpers/cleanup_txns.js');
var $config = (function() {
function quietly(func) {
const printOriginal = print;
try {
print = Function.prototype;
func();
} finally {
print = printOriginal;
}
}
function autoRetryTxn(data, func) {
// joinAndRetry is true either if there is a TransientTransactionError or if
// startTransaction fails with ConflictingOperationInProgress. The latter occurs when we
// attempt to start a transaction with a txnNumber that is already active on this session.
// In both cases, we will re-run the command with this txnNumber without calling
// startTransaction, and essentially join the already running transaction.
let joinAndRetry = false;
do {
try {
joinAndRetry = false;
func();
} catch (e) {
if (e.code === ErrorCodes.TransactionTooOld ||
e.code === ErrorCodes.NoSuchTransaction ||
e.code === ErrorCodes.TransactionCommitted) {
// We pass `ignoreActiveTxn = true` to startTransaction so that we will not
// throw `Transaction already in progress on this session` when trying to start
// a new transaction on this client session that already has an active
// transaction on it. We instead will catch the ConflictingOperationInProgress
// error that the server later throws, and will re-run the command with
// 'startTransaction = false' so that we join the already running transaction.
data.session.startTransaction_forTesting({readConcern: {level: 'snapshot'}},
{ignoreActiveTxn: true});
data.txnNumber++;
joinAndRetry = true;
continue;
}
if ((e.hasOwnProperty('errorLabels') &&
e.errorLabels.includes('TransientTransactionError')) ||
e.code === ErrorCodes.ConflictingOperationInProgress) {
joinAndRetry = true;
continue;
}
throw e;
}
} while (joinAndRetry);
}
const states = {
init: function init(db, collName) {
this.session = db.getMongo().startSession({causalConsistency: true});
this.sessionDb = this.session.getDatabase(db.getName());
this.iteration = 1;
this.session.startTransaction_forTesting({readConcern: {level: 'snapshot'}});
this.txnNumber = 0;
},
runFindAndModify: function runFindAndModify(db, collName) {
autoRetryTxn(this, () => {
const collection = this.session.getDatabase(db.getName()).getCollection(collName);
assertAlways.commandWorked(collection.runCommand(
'findAndModify', {query: {_id: this.tid}, update: {$inc: {x: 1}}, new: true}));
});
},
runUpdate: function runUpdate(db, collName) {
autoRetryTxn(this, () => {
const collection = this.session.getDatabase(db.getName()).getCollection(collName);
assertAlways.commandWorked(collection.runCommand('update', {
updates: [{q: {_id: this.tid}, u: {$inc: {x: 1}}}],
}));
});
},
runDelete: function runDelete(db, collName) {
autoRetryTxn(this, () => {
const collection = this.session.getDatabase(db.getName()).getCollection(collName);
assertAlways.commandWorked(collection.runCommand('delete', {
deletes: [{q: {_id: this.tid}, limit: 1}],
}));
});
},
runFindAndGetMore: function runFindAndGetMore(db, collName) {
autoRetryTxn(this, () => {
const collection = this.session.getDatabase(db.getName()).getCollection(collName);
const documents = collection.find().batchSize(2).toArray();
});
},
commitTxn: function commitTxn(db, collName) {
// shouldJoin is true when commitTransaction fails with ConflictingOperationInProgress.
// This occurs when there's a transaction with the same txnNumber running on this
// session. In this case we "join" this other transaction and retry the commit, meaning
// all operations that were run on this thread will be committed in the same transaction
// as the transaction we join.
let shouldJoin;
do {
try {
shouldJoin = false;
quietly(() =>
assert.commandWorked(this.session.commitTransaction_forTesting()));
} catch (e) {
if (e.code === ErrorCodes.TransactionTooOld ||
e.code === ErrorCodes.TransactionCommitted ||
e.code === ErrorCodes.NoSuchTransaction) {
// If we get TransactionTooOld, TransactionCommitted, or NoSuchTransaction
// we do not try to commit this transaction.
break;
}
if ((e.hasOwnProperty('errorLabels') &&
e.errorLabels.includes('TransientTransactionError')) ||
e.code === ErrorCodes.ConflictingOperationInProgress) {
shouldJoin = true;
continue;
}
throw e;
}
} while (shouldJoin);
this.session.startTransaction_forTesting({readConcern: {level: 'snapshot'}});
this.txnNumber++;
},
};
// Wrap each state in a cleanupOnLastIteration() invocation.
for (let stateName of Object.keys(states)) {
const stateFn = states[stateName];
states[stateName] = function(db, collName) {
cleanupOnLastIteration(this, () => stateFn.apply(this, arguments));
};
}
function setup(db, collName, cluster) {
assertWhenOwnColl.commandWorked(db.runCommand({create: collName}));
const bulk = db[collName].initializeUnorderedBulkOp();
for (let i = 0; i < this.numDocs; ++i) {
bulk.insert({_id: i, x: i});
}
const res = bulk.execute({w: 'majority'});
assertWhenOwnColl.commandWorked(res);
assertWhenOwnColl.eq(this.numDocs, res.nInserted);
if (cluster.isSharded()) {
// Advance each router's cluster time to be >= the time of the writes, so the first
// global snapshots chosen by each is guaranteed to include the inserted documents.
cluster.synchronizeMongosClusterTimes();
}
}
function teardown(db, collName, cluster) {
}
const transitions = {
init: {runFindAndModify: .25, runUpdate: .25, runDelete: .25, runFindAndGetMore: .25},
runFindAndModify: {
runFindAndModify: .2,
runUpdate: .2,
runDelete: .2,
runFindAndGetMore: .2,
commitTxn: .2
},
runUpdate: {
runFindAndModify: .2,
runUpdate: .2,
runDelete: .2,
runFindAndGetMore: .2,
commitTxn: .2
},
runDelete: {
runFindAndModify: .2,
runUpdate: .2,
runDelete: .2,
runFindAndGetMore: .2,
commitTxn: .2
},
runFindAndGetMore: {
runFindAndModify: .2,
runUpdate: .2,
runDelete: .2,
runFindAndGetMore: .2,
commitTxn: .2
},
commitTxn: {runFindAndModify: .25, runUpdate: .25, runDelete: .25, runFindAndGetMore: .25},
};
return {
threadCount: 5,
iterations: 20,
states: states,
transitions: transitions,
data: {
numDocs: 20,
ignoreActiveTxn: false,
},
setup: setup,
teardown: teardown
};
})();
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