| /* |
| * 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.repair; |
| |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import com.google.common.base.Preconditions; |
| |
| import org.apache.cassandra.concurrent.ExecutorPlus; |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.db.Keyspace; |
| import org.apache.cassandra.dht.Range; |
| import org.apache.cassandra.dht.Token; |
| import org.apache.cassandra.locator.InetAddressAndPort; |
| import org.apache.cassandra.metrics.RepairMetrics; |
| import org.apache.cassandra.repair.consistent.SyncStatSummary; |
| import org.apache.cassandra.repair.messages.RepairOption; |
| import org.apache.cassandra.streaming.PreviewKind; |
| import org.apache.cassandra.utils.DiagnosticSnapshotService; |
| import org.apache.cassandra.utils.TimeUUID; |
| import org.apache.cassandra.utils.concurrent.Future; |
| |
| public class PreviewRepairTask extends AbstractRepairTask |
| { |
| private final TimeUUID parentSession; |
| private final List<CommonRange> commonRanges; |
| private final String[] cfnames; |
| private volatile String successMessage = name() + " completed successfully"; |
| |
| protected PreviewRepairTask(RepairOption options, String keyspace, RepairNotifier notifier, TimeUUID parentSession, List<CommonRange> commonRanges, String[] cfnames) |
| { |
| super(options, keyspace, notifier); |
| this.parentSession = parentSession; |
| this.commonRanges = commonRanges; |
| this.cfnames = cfnames; |
| } |
| |
| @Override |
| public String name() |
| { |
| return "Repair preview"; |
| } |
| |
| @Override |
| public String successMessage() |
| { |
| return successMessage; |
| } |
| |
| @Override |
| public Future<CoordinatedRepairResult> performUnsafe(ExecutorPlus executor) |
| { |
| Future<CoordinatedRepairResult> f = runRepair(parentSession, false, executor, commonRanges, cfnames); |
| return f.map(result -> { |
| if (result.hasFailed()) |
| return result; |
| |
| PreviewKind previewKind = options.getPreviewKind(); |
| Preconditions.checkState(previewKind != PreviewKind.NONE, "Preview is NONE"); |
| SyncStatSummary summary = new SyncStatSummary(true); |
| summary.consumeSessionResults(result.results); |
| |
| final String message; |
| if (summary.isEmpty()) |
| { |
| message = previewKind == PreviewKind.REPAIRED ? "Repaired data is in sync" : "Previewed data was in sync"; |
| } |
| else |
| { |
| message = (previewKind == PreviewKind.REPAIRED ? "Repaired data is inconsistent\n" : "Preview complete\n") + summary; |
| RepairMetrics.previewFailures.inc(); |
| if (previewKind == PreviewKind.REPAIRED) |
| maybeSnapshotReplicas(parentSession, keyspace, result.results.get()); // we know its present as summary used it |
| } |
| successMessage += "; " + message; |
| notifier.notification(message); |
| |
| return result; |
| }); |
| } |
| |
| private void maybeSnapshotReplicas(TimeUUID parentSession, String keyspace, List<RepairSessionResult> results) |
| { |
| if (!DatabaseDescriptor.snapshotOnRepairedDataMismatch()) |
| return; |
| |
| try |
| { |
| Set<String> mismatchingTables = new HashSet<>(); |
| Set<InetAddressAndPort> nodes = new HashSet<>(); |
| Set<Range<Token>> ranges = new HashSet<>(); |
| for (RepairSessionResult sessionResult : results) |
| { |
| for (RepairResult repairResult : emptyIfNull(sessionResult.repairJobResults)) |
| { |
| for (SyncStat stat : emptyIfNull(repairResult.stats)) |
| { |
| if (!stat.differences.isEmpty()) |
| { |
| mismatchingTables.add(repairResult.desc.columnFamily); |
| ranges.addAll(stat.differences); |
| } |
| // snapshot all replicas, even if they don't have any differences |
| nodes.add(stat.nodes.coordinator); |
| nodes.add(stat.nodes.peer); |
| } |
| } |
| } |
| |
| String snapshotName = DiagnosticSnapshotService.getSnapshotName(DiagnosticSnapshotService.REPAIRED_DATA_MISMATCH_SNAPSHOT_PREFIX); |
| for (String table : mismatchingTables) |
| { |
| // we can just check snapshot existence locally since the repair coordinator is always a replica (unlike in the read case) |
| if (!Keyspace.open(keyspace).getColumnFamilyStore(table).snapshotExists(snapshotName)) |
| { |
| List<Range<Token>> normalizedRanges = Range.normalize(ranges); |
| logger.info("{} Snapshotting {}.{} for preview repair mismatch for ranges {} with tag {} on instances {}", |
| options.getPreviewKind().logPrefix(parentSession), |
| keyspace, table, normalizedRanges, snapshotName, nodes); |
| DiagnosticSnapshotService.repairedDataMismatch(Keyspace.open(keyspace).getColumnFamilyStore(table).metadata(), |
| nodes, |
| normalizedRanges); |
| } |
| else |
| { |
| logger.info("{} Not snapshotting {}.{} - snapshot {} exists", |
| options.getPreviewKind().logPrefix(parentSession), |
| keyspace, table, snapshotName); |
| } |
| } |
| } |
| catch (Exception e) |
| { |
| logger.error("{} Failed snapshotting replicas", options.getPreviewKind().logPrefix(parentSession), e); |
| } |
| } |
| |
| private static <T> Iterable<T> emptyIfNull(Iterable<T> iter) |
| { |
| if (iter == null) |
| return Collections.emptyList(); |
| return iter; |
| } |
| } |