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94 lines
4.1 KiB
JavaScript
94 lines
4.1 KiB
JavaScript
/**
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* When the oplog size grows during recovery to exceed the configured maximum, the node must
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* truncate the oplog only up to the oldest active transaction timestamp at the time of the last
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* stable checkpoint. The first oplog entry that belongs to an active transaction is preserved, and
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* all entries after it.
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*
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* This tests the oldestActiveTransactionTimestamp, which is calculated from the "startOpTime"
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* field of documents in the config.transactions collection.
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*
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* @tags: [requires_persistence, uses_transactions, uses_prepare_transaction]
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*/
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(function() {
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"use strict";
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load("jstests/core/txns/libs/prepare_helpers.js");
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load("jstests/libs/check_log.js");
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// A new replica set for both the commit and abort tests to ensure the same clean state.
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function doTest(commitOrAbort) {
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const replSet = new ReplSetTest({
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// Oplog can be truncated each "sync" cycle. Increase its frequency to once per second.
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nodeOptions:
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{syncdelay: 1, setParameter: {logComponentVerbosity: tojson({storage: 1})}},
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nodes: [{}, {rsConfig: {priority: 0, votes: 0}}]
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});
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replSet.startSet(PrepareHelpers.replSetStartSetOptions);
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replSet.initiate();
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const primary = replSet.getPrimary();
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const primaryOplog = primary.getDB("local").oplog.rs;
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assert.lte(primaryOplog.dataSize(), PrepareHelpers.oplogSizeBytes);
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const coll = primary.getDB("test").test;
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assert.commandWorked(coll.insert({}, {writeConcern: {w: "majority"}}));
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jsTestLog("Prepare a transaction");
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const session = primary.startSession();
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session.startTransaction();
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assert.commandWorked(session.getDatabase("test").test.insert({myTransaction: 1}));
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const prepareTimestamp = PrepareHelpers.prepareTransaction(session);
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const oldestRequiredTimestampForCrashRecovery =
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PrepareHelpers.getOldestRequiredTimestampForCrashRecovery(primary.getDB("test"));
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assert.lte(oldestRequiredTimestampForCrashRecovery, prepareTimestamp);
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jsTestLog("Insert documents until oplog exceeds oplogSize");
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// Oplog with prepared txn grows indefinitely - let it reach twice its supposed max size.
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PrepareHelpers.growOplogPastMaxSize(replSet);
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// Oplog grew past maxSize, and it includes the oldest active transaction's entry.
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var secondary = replSet.getSecondary();
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function checkSecondaryOplog() {
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const secondaryOplog = secondary.getDB("local").oplog.rs;
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assert.soon(() => {
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return secondaryOplog.dataSize() >= PrepareHelpers.oplogSizeBytes;
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}, "waiting for secondary oplog to grow", ReplSetTest.kDefaultTimeoutMS);
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const secondaryOplogEntry = PrepareHelpers.findPrepareEntry(secondaryOplog);
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assert.eq(secondaryOplogEntry.ts, prepareTimestamp, tojson(secondaryOplogEntry));
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}
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checkSecondaryOplog();
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jsTestLog("Restart the secondary");
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const secondaryId = replSet.getSecondary().nodeId;
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// Validation can't complete while the active transaction holds a lock.
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replSet.stop(secondaryId, undefined, {skipValidation: true});
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secondary = replSet.start(secondaryId, {}, true /* restart */);
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jsTestLog("Restarted");
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replSet.awaitSecondaryNodes();
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checkSecondaryOplog();
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if (commitOrAbort === "commit") {
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jsTestLog("Commit prepared transaction and wait for oplog to shrink to max oplogSize");
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PrepareHelpers.commitTransaction(session, prepareTimestamp);
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} else if (commitOrAbort === "abort") {
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jsTestLog("Abort prepared transaction and wait for oplog to shrink to max oplogSize");
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assert.commandWorked(session.abortTransaction_forTesting());
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} else {
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throw new Error(`Unrecognized value for commitOrAbort: ${commitOrAbort}`);
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}
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PrepareHelpers.awaitOplogTruncation(replSet);
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// ReplSetTest reacts poorly to restarting a node, end it manually.
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replSet.stopSet(true, false, {});
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}
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doTest("commit");
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doTest("abort");
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})();
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