aweisberg commented on code in PR #3777: URL: https://github.com/apache/cassandra/pull/3777#discussion_r1917284102
########## test/distributed/org/apache/cassandra/distributed/test/accord/AccordMigrationReadRaceTestBase.java: ########## @@ -0,0 +1,649 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.cassandra.distributed.test.accord; + +import java.io.IOException; +import java.net.InetSocketAddress; +import java.nio.ByteBuffer; +import java.util.ArrayDeque; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Comparator; +import java.util.List; +import java.util.NavigableSet; +import java.util.Queue; +import java.util.Random; +import java.util.Set; +import java.util.TreeSet; +import java.util.concurrent.ConcurrentLinkedQueue; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.Future; +import java.util.concurrent.TimeUnit; +import java.util.function.Consumer; + +import com.google.common.base.Stopwatch; +import com.google.common.collect.ImmutableList; +import com.google.common.collect.Sets; +import org.junit.After; +import org.junit.AfterClass; +import org.junit.BeforeClass; +import org.junit.Test; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import accord.primitives.Ranges; +import org.apache.cassandra.ServerTestUtils; +import org.apache.cassandra.Util; +import org.apache.cassandra.config.CassandraRelevantProperties; +import org.apache.cassandra.config.Config.PaxosVariant; +import org.apache.cassandra.config.DatabaseDescriptor; +import org.apache.cassandra.dht.IPartitioner; +import org.apache.cassandra.dht.Murmur3Partitioner; +import org.apache.cassandra.dht.Murmur3Partitioner.LongToken; +import org.apache.cassandra.dht.Range; +import org.apache.cassandra.dht.Token; +import org.apache.cassandra.distributed.Cluster; +import org.apache.cassandra.distributed.api.ICoordinator; +import org.apache.cassandra.distributed.api.IInstance; +import org.apache.cassandra.distributed.api.IInvokableInstance; +import org.apache.cassandra.distributed.api.IMessage; +import org.apache.cassandra.distributed.api.IMessageSink; +import org.apache.cassandra.distributed.api.SimpleQueryResult; +import org.apache.cassandra.distributed.shared.ClusterUtils; +import org.apache.cassandra.distributed.test.accord.InteropTokenRangeTest.TokenOperator; +import org.apache.cassandra.repair.RepairJobDesc; +import org.apache.cassandra.repair.RepairResult; +import org.apache.cassandra.schema.Schema; +import org.apache.cassandra.schema.TableId; +import org.apache.cassandra.service.StorageService; +import org.apache.cassandra.service.accord.AccordService; +import org.apache.cassandra.service.accord.TokenRange; +import org.apache.cassandra.service.accord.api.AccordRoutingKey.TokenKey; +import org.apache.cassandra.service.consensus.TransactionalMode; +import org.apache.cassandra.service.consensus.migration.ConsensusMigrationRepairResult; +import org.apache.cassandra.service.consensus.migration.ConsensusTableMigration; +import org.apache.cassandra.service.consensus.migration.TransactionalMigrationFromMode; +import org.apache.cassandra.tcm.ClusterMetadata; +import org.apache.cassandra.tcm.Epoch; +import org.apache.cassandra.utils.FBUtilities; +import org.apache.cassandra.utils.Pair; +import org.apache.cassandra.utils.Throwables.ThrowingRunnable; +import org.assertj.core.api.Assertions; +import org.eclipse.jetty.util.ConcurrentHashSet; + +import static com.google.common.collect.ImmutableList.toImmutableList; +import static java.lang.String.format; +import static org.apache.cassandra.Util.spinAssertEquals; +import static org.apache.cassandra.dht.Murmur3Partitioner.LongToken.keyForToken; +import static org.apache.cassandra.distributed.api.ConsistencyLevel.ALL; +import static org.apache.cassandra.distributed.shared.ClusterUtils.getNextEpoch; +import static org.apache.cassandra.distributed.shared.ClusterUtils.pauseBeforeEnacting; +import static org.apache.cassandra.distributed.shared.ClusterUtils.unpauseEnactment; +import static org.apache.cassandra.distributed.test.accord.InteropTokenRangeTest.TokenOperator.gt; +import static org.apache.cassandra.distributed.test.accord.InteropTokenRangeTest.TokenOperator.gte; +import static org.apache.cassandra.distributed.test.accord.InteropTokenRangeTest.TokenOperator.lt; +import static org.apache.cassandra.distributed.test.accord.InteropTokenRangeTest.TokenOperator.lte; +import static org.apache.cassandra.distributed.util.QueryResultUtil.assertThat; +import static org.apache.cassandra.utils.ByteBufferUtil.bytesToHex; +import static org.junit.Assert.assertEquals; + +/* + * Test that non-transactional read operations migrating to/from a mode where Accord ignores commit consistency levels + * and does aysnc commit are routed correctly. Currently this is just TransactionalMode.full + */ +public abstract class AccordMigrationReadRaceTestBase extends AccordTestBase +{ + private static final Logger logger = LoggerFactory.getLogger(AccordMigrationReadRaceTestBase.class); + private static final int TEST_BOUNDS_CONCURRENCY = 32; + // Set BATCH_INDEX to the failing batch and this to true to find out the query index, then set QUERY_INDEX + private static final boolean EXECUTE_BATCH_QUERIES_SERIALLY = false; + // Specify only a single batch or query to run + private static final Integer BATCH_INDEX = null; + private static final Integer QUERY_INDEX = null; + private static final String TABLE_FMT = "CREATE TABLE %s (pk blob, c int, v int, PRIMARY KEY ((pk), c));"; + + private static IPartitioner partitioner; + + private static Range<Token> migratingRange; + + private static ICoordinator coordinator; + + private final static TestMessageSink messageSink = new TestMessageSink(); + private static class TestMessageSink implements IMessageSink + { + private final Queue<Pair<InetSocketAddress,IMessage>> messages = new ConcurrentLinkedQueue<>(); + private final Set<InetSocketAddress> blackholed = new ConcurrentHashSet<>(); + + public void reset() + { + messages.clear(); + blackholed.clear(); + } + + @Override + public void accept(InetSocketAddress to, IMessage message) { + messages.offer(Pair.create(to,message)); + IInstance i = SHARED_CLUSTER.get(to); + if (blackholed.contains(to) || blackholed.contains(message.from())) + return; + if (i != null) + i.receiveMessage(message); + } + } + + private final boolean migrateAwayFromAccord; + + protected AccordMigrationReadRaceTestBase() + { + this.migrateAwayFromAccord = migratingAwayFromAccord(); + } + + protected abstract boolean migratingAwayFromAccord(); + + @Override + protected Logger logger() + { + return logger; + } + + @BeforeClass + public static void setupClass() throws IOException + { + ServerTestUtils.daemonInitialization(); + // Otherwise repair complains if you don't specify a keyspace + CassandraRelevantProperties.SYSTEM_TRACES_DEFAULT_RF.setInt(3); + AccordTestBase.setupCluster(builder -> builder.appendConfig(config -> config.set("paxos_variant", PaxosVariant.v2.name()) + .set("read_request_timeout", "3600s") + .set("range_request_timeout", "3600s") + .set("native_transport_timeout", "3600s") + .set("accord.range_migration", "explicit")), 3); + partitioner = FBUtilities.newPartitioner(SHARED_CLUSTER.get(1).callsOnInstance(() -> DatabaseDescriptor.getPartitioner().getClass().getSimpleName()).call()); + StorageService.instance.setPartitionerUnsafe(partitioner); + ServerTestUtils.prepareServerNoRegister(); + LongToken migrationStart = new LongToken(Long.valueOf(SHARED_CLUSTER.get(2).callOnInstance(() -> DatabaseDescriptor.getInitialTokens().iterator().next()))); + LongToken migrationEnd = new LongToken(Long.valueOf(SHARED_CLUSTER.get(3).callOnInstance(() -> DatabaseDescriptor.getInitialTokens().iterator().next()))); + migratingRange = new Range<>(migrationStart, migrationEnd); + coordinator = SHARED_CLUSTER.coordinator(1); + SHARED_CLUSTER.setMessageSink(messageSink); + buildData(); + } + + private static final int NUM_PARTITIONS = 1000; + private static final int ROWS_PER_PARTITION = 10; + private static final Object[][][] data = new Object[NUM_PARTITIONS][][]; + private static final Object[][] dataFlat = new Object[NUM_PARTITIONS * ROWS_PER_PARTITION][]; + private static ByteBuffer pkeyAccord; + private static int pkeyAccordDataIndex; + + private static void buildData() + { + Random r = new Random(0); + long[] tokens = new long[NUM_PARTITIONS]; + for (int i = 0; i < tokens.length; i++) + tokens[i] = r.nextLong(); + Arrays.sort(tokens); + + for (int i = 0; i < NUM_PARTITIONS; i++) + { + data[i] = new Object[ROWS_PER_PARTITION][]; + ByteBuffer pk = keyForToken(tokens[i]); + for (int j = 0; j < ROWS_PER_PARTITION; j++) + { + int clustering = r.nextInt(); + data[i][j] = new Object[] { pk, clustering, 42 }; + } + Arrays.sort(data[i], Comparator.comparing(row -> (Integer)row[1])); + } + for (int i = 0; i < NUM_PARTITIONS; i++) + { + for (int j = 0; j < ROWS_PER_PARTITION; j++) + { + int idx = i * ROWS_PER_PARTITION + j; + dataFlat[idx] = new Object[] { data[i][j][0], data[i][j][1], data[i][j][2] }; + if (migratingRange.contains(Murmur3Partitioner.instance.getToken((ByteBuffer)data[i][j][0]))) + { + pkeyAccord = (ByteBuffer)data[i][j][0]; + pkeyAccordDataIndex = i; + } + } + } + } + + @AfterClass + public static void tearDownClass() + { + StorageService.instance.resetPartitionerUnsafe(); + } + + @After + public void tearDown() throws Exception + { + super.tearDown(); + messageSink.reset(); + SHARED_CLUSTER.forEach(ClusterUtils::clearAndUnpause); + super.tearDown(); + } + + private void loadData() throws Exception + { + logger.info("Starting data load"); + Stopwatch sw = Stopwatch.createStarted(); + List<java.util.concurrent.Future<SimpleQueryResult>> inserts = new ArrayList<>(); + for (int i = 0; i < NUM_PARTITIONS; i++) + { + for (int j = 0; j < ROWS_PER_PARTITION; j++) + inserts.add(coordinator.asyncExecuteWithResult(insertCQL(qualifiedAccordTableName, (ByteBuffer)data[i][j][0], (int)data[i][j][1], (int)data[i][j][2]), ALL)); + + if (i % 100 == 0) + { + for (java.util.concurrent.Future<SimpleQueryResult> insert : inserts) + insert.get(); + inserts.clear(); + } + } + logger.info("Data load took %dms", sw.elapsed(TimeUnit.MILLISECONDS)); + } + + private NavigableSet<Long> boundsTokens() + { + long migratingRangeStart = migratingRange.left.getLongValue(); + long migratingRangeEnd = migratingRange.right.getLongValue(); + NavigableSet<Long> set = new TreeSet<>(); + set.add(migratingRangeStart - 1); + set.add(migratingRangeStart); + set.add(migratingRangeStart + 1); + set.add(migratingRangeEnd - 1); + set.add(migratingRangeEnd); + set.add(migratingRangeEnd + 1); + set.add(Long.MAX_VALUE); + set.add(Long.MIN_VALUE + 1); + set.add(0L); + return set; + } + + private void loadOverlapData() + { + for (long token : boundsTokens()) + coordinator.executeWithResult(insertCQL(qualifiedAccordTableName, keyForToken(token), 42, 43), ALL); + } + + @Test + public void testKeyRouting() throws Throwable + { + String readCQL = "SELECT * FROM " + qualifiedAccordTableName + " WHERE pk = 0x" + bytesToHex(pkeyAccord); + testSplitAndRetry(readCQL, this::loadData, result -> assertThat(result).isDeepEqualTo(data[pkeyAccordDataIndex])); + } + + @Test + public void testRangeRouting() throws Throwable + { + String cql = "SELECT * FROM " + qualifiedAccordTableName + " WHERE token(pk) > " + Murmur3Partitioner.MINIMUM.token; + testSplitAndRetry(cql, this::loadData, result -> { + assertThat(result).isDeepEqualTo(dataFlat); + }); + } + + @Test + public void testBounds() throws Throwable + { + NavigableSet<Long> tokens = boundsTokens(); + Queue<String> queries = new ArrayDeque<>(); + Queue<Consumer<SimpleQueryResult>> validations = new ArrayDeque<>(); + Queue<String> retryExpectedQueries = new ArrayDeque<>(); + Queue<Consumer<SimpleQueryResult>> retryExpectedValidations = new ArrayDeque<>(); + for (long firstToken : tokens) + { + ByteBuffer pk = keyForToken(firstToken); + for (TokenOperator op : TokenOperator.values()) + { + String cql = "SELECT * FROM %s WHERE " + op.condition; + cql = cql.replace("?", "0x" + bytesToHex(pk)); + NavigableSet<Long> expectedTokens = op.expected(firstToken, tokens); + boolean expectRetry = op.intersects(firstToken, migratingRange); + Consumer<SimpleQueryResult> validation = result -> { + Assertions.assertThat(InteropTokenRangeTest.tokens(result)) + .describedAs("Token %d with operator %s", firstToken, op.condition) + .isEqualTo(expectedTokens); + }; + if (expectRetry) + { + retryExpectedQueries.add(cql); + retryExpectedValidations.add(validation); + } + else + { + queries.add(cql); + validations.add(validation); + } + } + + for (long secondToken : tokens) + { + for (TokenOperator lt : Arrays.asList(lt, lte)) + { + for (TokenOperator gt : Arrays.asList(gt, gte)) + { + ByteBuffer gtPk = keyForToken(secondToken); + String cql = "SELECT * FROM %s WHERE " + lt.condition + " AND " + gt.condition; + cql = cql.replaceFirst("\\?", "0x" + bytesToHex(pk)); + cql = cql.replaceFirst("\\?", "0x" + bytesToHex(gtPk)); + NavigableSet<Long> expectedTokens = new TreeSet<>(Sets.intersection(lt.expected(firstToken, tokens), gt.expected(secondToken, tokens))); + Consumer<SimpleQueryResult> validation = result -> { + Assertions.assertThat(InteropTokenRangeTest.tokens(result)) + .describedAs("LT Token %d GT Token %d with operators %s / %s", firstToken, secondToken, lt.condition, gt.condition) + .isEqualTo(expectedTokens); + }; + boolean expectRetry = lt.intersects(firstToken, migratingRange) && gt.intersects(secondToken, migratingRange); + // This evaluates to no rows without actually executing + if (firstToken == secondToken && (lt == TokenOperator.lt || gt == TokenOperator.gt)) + expectRetry = false; + if (firstToken < secondToken) + expectRetry = false; + if (expectRetry) + { + retryExpectedQueries.add(cql); + retryExpectedValidations.add(validation); + } + else + { + queries.add(cql); + validations.add(validation); + } + } + } + + ByteBuffer rhsPK = keyForToken(secondToken); + String cql = "SELECT * FROM %s WHERE token(pk) BETWEEN token(?) AND token(?)"; + cql = cql.replaceFirst("\\?", "0x" + bytesToHex(pk)); + cql = cql.replaceFirst("\\?", "0x" + bytesToHex(rhsPK)); + NavigableSet<Long> expectedTokens = new TreeSet<>(Sets.intersection(gte.expected(firstToken, tokens), lte.expected(secondToken, tokens))); + Consumer<SimpleQueryResult> validation = result -> { + Assertions.assertThat(InteropTokenRangeTest.tokens(result)) + .describedAs("Between token %d and %d with operator token(pk) BETWEEN token(?) AND token(?)", firstToken, secondToken) + .isEqualTo(expectedTokens); + }; + // Cassandra straight up returns the wrong answer here so until it is fixed skip it + // https://issues.apache.org/jira/browse/CASSANDRA-20154 + if (firstToken > secondToken) + continue; + boolean expectRetry = gte.intersects(firstToken, migratingRange) && lte.intersects(secondToken, migratingRange); + if (expectRetry) + { + retryExpectedQueries.add(cql); + retryExpectedValidations.add(validation); + } + else + { + queries.add(cql); + validations.add(validation); + } + } + } + + testBoundsBatches(queries, validations, false); + testBoundsBatches(retryExpectedQueries, retryExpectedValidations, true); + } + + private void testBoundsBatches(Queue<String> queries, Queue<Consumer<SimpleQueryResult>> validations, boolean expectRetry) throws Throwable + { + List<String> queryBatch = new ArrayList<>(); + List<Consumer<SimpleQueryResult>> validationBatch = new ArrayList<>(); + int batchCount = 0; + while (!queries.isEmpty()) + { + queryBatch.add(queries.poll()); + validationBatch.add(validations.poll()); + if (queryBatch.size() == TEST_BOUNDS_CONCURRENCY) + { + if (BATCH_INDEX == null || BATCH_INDEX == batchCount) + { + logger.info("Executing batch {}", batchCount); + testBoundsBatch(queryBatch, validationBatch, expectRetry, batchCount); + } + else + { + logger.info("Skipping batch {}", batchCount); + } + batchCount++; + queryBatch.clear(); + validationBatch.clear(); + } + } + + if (!queryBatch.isEmpty()) + { + logger.info("Executing batch " + batchCount); + testBoundsBatch(queryBatch, validationBatch, expectRetry, batchCount); + } + } + + private void testBoundsBatch(List<String> readCQL, List<Consumer<SimpleQueryResult>> validation, boolean expectRetry, int batchCount) throws Throwable + { + if (EXECUTE_BATCH_QUERIES_SERIALLY) + { + for (int i = 0; i < readCQL.size(); i++) + { + if (QUERY_INDEX == null || QUERY_INDEX == i) + { + logger.info("Executing query from batch {} query index {}", batchCount, i); + String cql = format(readCQL.get(i), qualifiedAccordTableName); + testSplitAndRetry(ImmutableList.of(cql), this::loadOverlapData, ImmutableList.of(validation.get(i)), expectRetry); + tearDown(); + setup(); + afterEach(); + } + else + { + logger.info("Skipping query from batch {} query index {}", batchCount, i); + } + } + } + else + { + readCQL = readCQL.stream().map(cql -> format(cql, qualifiedAccordTableName)).collect(toImmutableList()); + testSplitAndRetry(readCQL, this::loadOverlapData, validation, expectRetry); + tearDown(); + setup(); + afterEach(); + } + } + + private void testSplitAndRetry(String readCQL, ThrowingRunnable load, Consumer<SimpleQueryResult> validation) throws Throwable + { + testSplitAndRetry(ImmutableList.of(readCQL), load, ImmutableList.of(validation),true); + } + + private void testSplitAndRetry(List<String> readCQL, ThrowingRunnable load, List<Consumer<SimpleQueryResult>> validation, boolean expectRetry) throws Throwable + { + test(createTables(TABLE_FMT, qualifiedAccordTableName), + cluster -> { + load.run(); + // Node 3 is always the out of sync node + IInvokableInstance outOfSyncInstance = setUpOutOfSyncNode(cluster); + ICoordinator coordinator = outOfSyncInstance.coordinator(); + int startMigrationRejectCount = getAccordReadMigrationRejects(3); + int startRetryCount = getReadRetryOnDifferentSystemCount(outOfSyncInstance); + int startRejectedCount = getReadsRejectedOnWrongSystemCount(); + logger.info("Executing reads " + readCQL + " expect retry " + expectRetry); + List<Future<SimpleQueryResult>> results = readCQL.stream() + .map(read -> coordinator.asyncExecuteWithResult(read, ALL)) + .collect(toImmutableList()); + + if (migrateAwayFromAccord && expectRetry) + { + int expectedTransactions = readCQL.size(); + // Accord will block until we unpause enactment so to test the routing we wait until the transaction + // has started so the epoch it is created in is the old one + Util.spinUntilTrue(() -> outOfSyncInstance.callOnInstance(() -> { + logger.info("Coordinating {}", AccordService.instance().node().coordinating()); + return AccordService.instance().node().coordinating().size() == expectedTransactions; + })); + + logger.info("Accord node is now coordinating something, unpausing so it can continue to execute"); + } + + if (!migrateAwayFromAccord && expectRetry) + spinAssertEquals(readCQL.size() * 2, 10, () -> getReadsRejectedOnWrongSystemCount() - startRejectedCount); + + // Accord can't finish the transaction without unpausing + if (expectRetry || migrateAwayFromAccord) + { + logger.info("Unpausing out of sync instance before waiting on result"); + // Testing read coordination retry loop let coordinator get up to date and retry + unpauseEnactment(outOfSyncInstance); + } + + try + { + for (int i = 0; i < results.size(); i++) + { + SimpleQueryResult result = results.get(i).get(); + logger.info("Result for: " + readCQL.get(i)); + logger.info(result.toString()); + try + { + validation.get(i).accept(result); + } + catch (Throwable t) + { + logger.info("Query index {} failed", i); + throw t; + } + } + } + catch (ExecutionException e) + { +// // This is expected when inverting the migration +// if (migrateAwayFromAccord && e.getCause() instanceof CoordinatorBehindException) +// throw e; + throw e; + } + + if (!expectRetry) + { + logger.info("Unpausing out of sync instance after waiting on result"); + // Testing read coordination retry loop let coordinator get up to date and retry + unpauseEnactment(outOfSyncInstance); + } + + int endRetryCount = getReadRetryOnDifferentSystemCount(outOfSyncInstance); + int endRejectedCount = getReadsRejectedOnWrongSystemCount(); + int endMigrationRejects = getAccordReadMigrationRejects(3); + if (expectRetry) + { + if (migrateAwayFromAccord) + { + assertEquals(readCQL.size(), endRetryCount - startRetryCount); + assertEquals(readCQL.size(), endMigrationRejects - startMigrationRejectCount); + } + else + { + assertEquals(1 * readCQL.size(), endRetryCount - startRetryCount); + // Expect only two nodes to reject since they enacted the new epoch + assertEquals(2 * readCQL.size(), endRejectedCount - startRejectedCount); + } + } + else + { + assertEquals(0, endRetryCount - startRetryCount); + assertEquals(0, endRejectedCount - startRejectedCount); + } + }); + } + + /* + * Set up 3 to be behind and unaware of the migration having progressed to the point where reads need to + * be on a different system while 1 and 2 are aware + */ + private IInvokableInstance setUpOutOfSyncNode(Cluster cluster) throws Throwable + { + IInvokableInstance i1 = cluster.get(1); + IInvokableInstance i2 = cluster.get(2); + IInvokableInstance i3 = cluster.get(3); + + long afterAlter = getNextEpoch(i1).getEpoch(); + logger.info("Epoch after alter {}", afterAlter); + if (migrateAwayFromAccord) + alterTableTransactionalMode(TransactionalMode.off, TransactionalMigrationFromMode.full); + else + alterTableTransactionalMode(TransactionalMode.full); + Util.spinUntilTrue(() -> cluster.stream().allMatch(instance -> instance.callOnInstance(() -> ClusterMetadata.current().epoch.equals(Epoch.create(afterAlter)))), 10); + + long afterMigrationStart = getNextEpoch(i1).getEpoch(); + logger.info("Epoch after migration start {}", afterMigrationStart); + long waitFori1Andi2ToEnact = afterMigrationStart; + // Migrating away from Accord need i3 to pause before enacting + if (migrateAwayFromAccord) + pauseBeforeEnacting(i3, Epoch.create(afterMigrationStart)); + // Reads are allowed until Accord thinks it owns the range and can start doing async commit and ignoring consistency levels + nodetool(coordinator, "consensus_admin", "begin-migration", "-st", migratingRange.left.toString(), "-et", migratingRange.right.toString(), KEYSPACE, accordTableName); + + if (!migrateAwayFromAccord) + { + // Migration to Accord does not have Accord read until the migration has completed a data repair and then an Accord repair + Util.spinUntilTrue(() -> cluster.stream().allMatch(instance -> instance.callOnInstance(() -> ClusterMetadata.current().epoch.equals(Epoch.create(afterMigrationStart)))), 10); + + long afterRepair = getNextEpoch(i1).getEpoch(); + logger.info("Epoch after repair {}", afterRepair); + // First repair only does the data and allows Accord to read, but doesn't require reads to be done through Accord + nodetool(i2, "repair", "-skip-paxos", "-skip-accord", "-st", migratingRange.left.toString(), "-et", migratingRange.right.toString(), KEYSPACE, accordTableName); + Util.spinUntilTrue(() -> cluster.stream().allMatch(instance -> instance.callOnInstance(() -> ClusterMetadata.current().epoch.equals(Epoch.create(afterRepair)))), 10); + + long afterRepairCompletionHandler = getNextEpoch(i1).getEpoch(); + logger.info("Epoch after repair completion handler {}", afterRepairCompletionHandler); + waitFori1Andi2ToEnact = afterRepairCompletionHandler; + // Node 3 will coordinate the query and not be aware that the migration has begun + pauseBeforeEnacting(i3, Epoch.create(afterRepairCompletionHandler)); + + // Unfortunately can't run real repair because it can't complete with i3 not responding because it's stuck waiting + // on TCM so fake the completion of the repair by invoking the completion handler directly + String keyspace = KEYSPACE; + String table = accordTableName; + long migratingTokenStart = migratingRange.left.getLongValue(); + long migratingTokenEnd = migratingRange.right.getLongValue(); + Future<?> result = SHARED_CLUSTER.get(1).asyncRunsOnInstance(() -> + { + Epoch startEpoch = ClusterMetadata.current().epoch; + TableId tableId = Schema.instance.getTableMetadata(keyspace, table).id; + List<Range<Token>> ranges = ImmutableList.of(new Range<>(new LongToken(migratingTokenStart), new LongToken(migratingTokenEnd))); + RepairJobDesc desc = new RepairJobDesc(null, null, keyspace, table, ranges); + TokenRange range = new TokenRange(new TokenKey(tableId, new LongToken(migratingTokenStart)), new TokenKey(tableId, new LongToken(migratingTokenEnd))); Review Comment: Sorry had some commits pushed to `post19437` instead of `post19437-rebased` -- This is an automated message from the Apache Git Service. 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