Vladsz83 commented on code in PR #11391: URL: https://github.com/apache/ignite/pull/11391#discussion_r1695090334
########## modules/core/src/main/java/org/apache/ignite/internal/processors/cache/persistence/snapshot/SnapshotCheckProcess.java: ########## @@ -0,0 +1,466 @@ +/* + * 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.ignite.internal.processors.cache.persistence.snapshot; + +import java.io.File; +import java.io.Serializable; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.UUID; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.ThreadLocalRandom; +import java.util.function.Function; +import java.util.stream.Collectors; +import org.apache.ignite.IgniteException; +import org.apache.ignite.IgniteLogger; +import org.apache.ignite.cluster.ClusterNode; +import org.apache.ignite.events.DiscoveryEvent; +import org.apache.ignite.internal.GridKernalContext; +import org.apache.ignite.internal.IgniteInternalFuture; +import org.apache.ignite.internal.cluster.ClusterTopologyCheckedException; +import org.apache.ignite.internal.management.cache.IdleVerifyResultV2; +import org.apache.ignite.internal.management.cache.PartitionKeyV2; +import org.apache.ignite.internal.processors.cache.verify.PartitionHashRecordV2; +import org.apache.ignite.internal.util.distributed.DistributedProcess; +import org.apache.ignite.internal.util.future.GridFinishedFuture; +import org.apache.ignite.internal.util.future.GridFutureAdapter; +import org.apache.ignite.internal.util.typedef.F; +import org.apache.ignite.internal.util.typedef.internal.CU; +import org.jetbrains.annotations.Nullable; + +import static org.apache.ignite.events.EventType.EVT_NODE_FAILED; +import static org.apache.ignite.events.EventType.EVT_NODE_LEFT; +import static org.apache.ignite.internal.util.distributed.DistributedProcess.DistributedProcessType.SNAPSHOT_CHECK_METAS; +import static org.apache.ignite.internal.util.distributed.DistributedProcess.DistributedProcessType.SNAPSHOT_VALIDATE_PARTS; + +/** Distributed process of snapshot checking (with the partition hashes). */ +public class SnapshotCheckProcess { + /** */ + private final IgniteLogger log; + + /** */ + private final GridKernalContext kctx; + + /** Snapshot check requests per snapshot on every node. */ + private final Map<String, SnapshotCheckProcessRequest> requests = new ConcurrentHashMap<>(); + + /** Cluster-wide operation futures per snapshot called from current node. */ + private final Map<UUID, GridFutureAdapter<SnapshotPartitionsVerifyTaskResult>> clusterOpFuts = new ConcurrentHashMap<>(); + + /** Check metas first phase subprocess. */ + private final DistributedProcess<SnapshotCheckProcessRequest, CheckResultDTO> phase1CheckMetas; + + /** Partition hashes second phase subprocess. */ + private final DistributedProcess<SnapshotCheckProcessRequest, CheckResultDTO> phase2PartsHashes; + + /** */ + public SnapshotCheckProcess(GridKernalContext kctx) { + this.kctx = kctx; + + log = kctx.log(getClass()); + + phase1CheckMetas = new DistributedProcess<>(kctx, SNAPSHOT_CHECK_METAS, this::prepareAndCheckMetas, + this::reducePreparationAndMetasCheck); + + phase2PartsHashes = new DistributedProcess<>(kctx, SNAPSHOT_VALIDATE_PARTS, this::validateParts, + this::reduceValidatePartsAndFinish); + + kctx.event().addLocalEventListener((evt) -> { + DiscoveryEvent devt = (DiscoveryEvent)evt; + + if (devt.eventNode().isClient() || requests.isEmpty()) + return; + + interrupt( + new ClusterTopologyCheckedException("Snapshot checking stopped. A node left the cluster: " + devt.eventNode() + '.'), + req -> req.nodes().contains(devt.eventNode().id()) + ); + }, EVT_NODE_FAILED, EVT_NODE_LEFT); + } + + /** */ + Map<String, SnapshotCheckProcessRequest> requests() { + return Collections.unmodifiableMap(requests); + } + + /** + * Stops the process with the passed exception. + * + * @param th The interrupt reason. + * @param rqFilter If not {@code null}, used to filter which requests/process to stop. If {@code null}, stops all the validations. + */ + void interrupt(Throwable th, @Nullable Function<SnapshotCheckProcessRequest, Boolean> rqFilter) { + requests.values().forEach(req -> { + if (rqFilter == null || rqFilter.apply(req)) { + req.error(th); + + clean(req.requestId(), th, null, null); + } + }); + } + + /** Phase 2 and process finish. */ + private IgniteInternalFuture<?> reduceValidatePartsAndFinish( + UUID procId, + Map<UUID, CheckResultDTO> results, + Map<UUID, Throwable> errors + ) { + clean(procId, null, results, errors); + + return new GridFinishedFuture<>(); + } + + /** Phase 2 beginning. */ + private IgniteInternalFuture<CheckResultDTO> validateParts(SnapshotCheckProcessRequest req) { + if (req.error() != null) + return new GridFinishedFuture<>(req.error()); + + SnapshotCheckProcessRequest locReq = currentRequest(null, req.requestId()); + + if (locReq == null) + return new GridFinishedFuture<>(); + + assert locReq.equals(req); + + // Store metas on the originator to redulte relusts later. + if (req.operationalNodeId().equals(kctx.localNodeId())) + locReq.metas = req.metas; + + // Local meta might be null if current node started after the snapshot creation or placement. + if (!req.nodes.contains(kctx.localNodeId()) || locReq.meta() == null) + return new GridFinishedFuture<>(); + + GridFutureAdapter<CheckResultDTO> locPartsChkFut = new GridFutureAdapter<>(); + + locReq.fut(locPartsChkFut); + + if (!locPartsChkFut.isDone()) { + File snpDir = kctx.cache().context().snapshotMgr().snapshotLocalDir(locReq.snapshotName(), locReq.snapshotPath()); + + kctx.cache().context().snapshotMgr().checker().checkPartitions(locReq.meta(), snpDir, locReq.groups(), false, true, false) + .whenComplete((res, err) -> { + if (err != null) + locPartsChkFut.onDone(err); + else + locPartsChkFut.onDone(new CheckResultDTO(res)); + }); + } + + return locPartsChkFut; + } + + /** Cleans certain snapshot validation. */ + private void clean( + UUID reqId, + @Nullable Throwable opErr, + @Nullable Map<UUID, CheckResultDTO> results, + @Nullable Map<UUID, Throwable> errors + ) { + GridFutureAdapter<SnapshotPartitionsVerifyTaskResult> clusterOpFut = clusterOpFuts.get(reqId); + + SnapshotCheckProcessRequest locReq = currentRequest(null, reqId); + + Throwable err = opErr; + + if (locReq != null) { + if (err == null && locReq.error() != null) + err = locReq.error(); + + GridFutureAdapter<?> locWorkingFut = locReq.fut(); + + boolean justFinished = locWorkingFut != null && locWorkingFut.onDone(err); + + requests.remove(locReq.snapshotName()); + + if (justFinished && log.isInfoEnabled()) + log.info("Finished snapshot local validation, req: " + locReq + '.'); + } + + if (clusterOpFut == null || clusterOpFut.isDone()) + return; + + Map<ClusterNode, Exception> errors0 = collectErrors(errors, locReq != null ? locReq.nodes() : null); + + if (err == null && !F.isEmpty(results)) { + assert results.values().stream().noneMatch(res -> res != null && res.metas != null); + assert locReq != null; + + Map<ClusterNode, Map<PartitionKeyV2, PartitionHashRecordV2>> results0 = collectPartsHashes(results, + locReq != null ? locReq.nodes() : null); + + IdleVerifyResultV2 chkRes = SnapshotChecker.reduceHashesResults(results0, errors0); + + clusterOpFut.onDone(new SnapshotPartitionsVerifyTaskResult(locReq.metas, chkRes)); + } + else + finishClusterFutureWithErr(clusterOpFut, err, errors0); + } + + /** */ + private Map<ClusterNode, Exception> collectErrors(@Nullable Map<UUID, Throwable> errors, @Nullable Set<UUID> requiredNodes) { + if (F.isEmpty(errors)) + return Collections.emptyMap(); + + return errors.entrySet().stream() + .filter(e -> (requiredNodes == null || requiredNodes.contains(e.getKey())) && e.getValue() != null) + .collect(Collectors.toMap(e -> kctx.cluster().get().node(e.getKey()), e -> asException(e.getValue()))); + } + + /** */ + private Map<ClusterNode, Map<PartitionKeyV2, PartitionHashRecordV2>> collectPartsHashes( + @Nullable Map<UUID, CheckResultDTO> results, + Collection<UUID> requiredNodes + ) { + if (F.isEmpty(results)) + return Collections.emptyMap(); + + return results.entrySet().stream() + .filter(e -> requiredNodes.contains(e.getKey()) && e.getValue() != null) + .collect(Collectors.toMap(e -> kctx.cluster().get().node(e.getKey()), e -> e.getValue().partsHashes)); + } + + /** + * @param snpName Snapshot name of the validation process. If {@code null}, ignored. + * @param procId If {@code snpName} is {@code null}, is used to find the operation request. + * @return Current snapshot checking request by {@code snpName} or {@code procId}. + */ + private @Nullable SnapshotCheckProcessRequest currentRequest(@Nullable String snpName, UUID procId) { + return snpName == null + ? requests.values().stream().filter(req -> req.requestId().equals(procId)).findFirst().orElse(null) + : requests.get(snpName); + } + + /** Phase 1 beginning: prepare, collect and check local metas. */ + private IgniteInternalFuture<CheckResultDTO> prepareAndCheckMetas(SnapshotCheckProcessRequest req) { + SnapshotCheckProcessRequest locReq = requests.computeIfAbsent(req.snapshotName(), snpName -> req); + + if (!locReq.equals(req)) { Review Comment: It also calls `super.equals(other)`. Doesn't it? -- This is an automated message from the Apache Git Service. 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