nizhikov commented on code in PR #10524: URL: https://github.com/apache/ignite/pull/10524#discussion_r1159772857
########## modules/core/src/main/java/org/apache/ignite/internal/visor/cdc/VisorCdcCacheDataResendTask.java: ########## @@ -0,0 +1,231 @@ +/* + * 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.visor.cdc; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.Iterator; +import java.util.List; +import java.util.Set; +import java.util.TreeSet; +import java.util.UUID; +import org.apache.ignite.IgniteCheckedException; +import org.apache.ignite.IgniteException; +import org.apache.ignite.IgniteLogger; +import org.apache.ignite.compute.ComputeJobResult; +import org.apache.ignite.internal.pagemem.wal.IgniteWriteAheadLogManager; +import org.apache.ignite.internal.pagemem.wal.record.CdcDataRecord; +import org.apache.ignite.internal.pagemem.wal.record.DataEntry; +import org.apache.ignite.internal.processors.affinity.AffinityTopologyVersion; +import org.apache.ignite.internal.processors.cache.GridCacheContext; +import org.apache.ignite.internal.processors.cache.GridCacheOperation; +import org.apache.ignite.internal.processors.cache.GridCachePartitionExchangeManager; +import org.apache.ignite.internal.processors.cache.IgniteInternalCache; +import org.apache.ignite.internal.processors.cache.KeyCacheObject; +import org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionsExchangeFuture; +import org.apache.ignite.internal.processors.cache.persistence.CacheDataRow; +import org.apache.ignite.internal.processors.task.GridInternal; +import org.apache.ignite.internal.util.lang.GridIterator; +import org.apache.ignite.internal.util.typedef.F; +import org.apache.ignite.internal.visor.VisorJob; +import org.apache.ignite.internal.visor.VisorMultiNodeTask; +import org.apache.ignite.internal.visor.VisorTaskArgument; +import org.apache.ignite.resources.LoggerResource; +import org.jetbrains.annotations.Nullable; + +/** + * Task to forcefully resend all cache data to CDC. + * Iterates over caches and writes data records to the WAL to get captured by CDC. + */ +@GridInternal +public class VisorCdcCacheDataResendTask extends VisorMultiNodeTask<VisorCdcCacheDataResendTaskArg, Void, Void> { + /** */ + private static final long serialVersionUID = 0L; + + /** Topology version when task was started. */ + private AffinityTopologyVersion topVer; + + /** {@inheritDoc} */ + @Override protected VisorJob<VisorCdcCacheDataResendTaskArg, Void> job(VisorCdcCacheDataResendTaskArg arg) { + return new VisorCdcCacheDataResendJob(arg, topVer); + } + + /** {@inheritDoc} */ + @Override protected Collection<UUID> jobNodes(VisorTaskArgument<VisorCdcCacheDataResendTaskArg> arg) { + // Check there is no rebalance. + GridDhtPartitionsExchangeFuture fut = ignite.context().cache().context().exchange().lastFinishedFuture(); + + if (!fut.rebalanced()) { + throw new IgniteException("CDC cache data resend cancelled. Rebalance sheduled " + + "[topVer=" + fut.topologyVersion() + ']'); + } + + // Cancel resend if affinity will change. + topVer = ignite.context().cache().context().exchange().lastAffinityChangedTopologyVersion(fut.topologyVersion()); + + return F.nodeIds(ignite.cluster().forServers().nodes()); + } + + /** {@inheritDoc} */ + @Override protected @Nullable Void reduce0(List<ComputeJobResult> results) throws IgniteException { + for (ComputeJobResult res : results) { + if (res.getException() != null) { + throw new IgniteException("CDC cache data resend cancelled. Failed to resend cache data " + + "on the node [nodeId=" + res.getNode().id() + ']', res.getException()); + } + } + + return null; + } + + /** */ + private static class VisorCdcCacheDataResendJob extends VisorJob<VisorCdcCacheDataResendTaskArg, Void> { + /** */ + private static final long serialVersionUID = 0L; + + /** Injected logger. */ + @LoggerResource + protected IgniteLogger log; + + /** */ + private IgniteWriteAheadLogManager wal; + + /** Topology version when task was started. */ + private final AffinityTopologyVersion topVer; + + /** + * @param arg Job argument. + * @param topVer Topology version when task was started. + */ + protected VisorCdcCacheDataResendJob(VisorCdcCacheDataResendTaskArg arg, AffinityTopologyVersion topVer) { + super(arg, false); + + this.topVer = topVer; + } + + /** {@inheritDoc} */ + @Override protected Void run(VisorCdcCacheDataResendTaskArg arg) throws IgniteException { + if (F.isEmpty(arg.caches())) + throw new IllegalArgumentException("Caches are not specified."); + + List<IgniteInternalCache<?, ?>> caches = new ArrayList<>(); + + for (String name : arg.caches()) { + IgniteInternalCache<?, ?> cache = ignite.context().cache().cache(name); + + if (cache == null) + throw new IgniteException("Cache does not exist [cacheName=" + name + ']'); + + if (!cache.context().dataRegion().config().isCdcEnabled()) { + throw new IgniteException("CDC is not enabled for given cache [cacheName=" + name + + ", dataRegionName=" + cache.context().dataRegion().config().getName() + ']'); + } + + caches.add(cache); + } + + if (log.isInfoEnabled()) + log.info("CDC cache data resend started [caches=" + String.join(", ", arg.caches()) + ']'); + + wal = ignite.context().cache().context().wal(true); + + try { + Iterator<IgniteInternalCache<?, ?>> iter = caches.iterator(); + + while (iter.hasNext() && !isCancelled()) + resendCacheData(iter.next()); + + wal.flush(null, true); + + if (log.isInfoEnabled()) { + log.info("CDC cache data resend " + (isCancelled() ? "cancelled" : "finished") + + " [caches=" + String.join(", ", arg.caches()) + ']'); + } + } + catch (IgniteCheckedException e) { + throw new IgniteException(e); + } + + return null; + } + + /** @param cache Cache. */ + private void resendCacheData(IgniteInternalCache<?, ?> cache) throws IgniteCheckedException { + if (log.isInfoEnabled()) + log.info("CDC cache data resend started [cacheName=" + cache.name() + ']'); + + GridCacheContext<?, ?> cctx = cache.context(); + GridCachePartitionExchangeManager<Object, Object> exchange = ignite.context().cache().context().exchange(); + + GridIterator<CacheDataRow> localRows = cctx.offheap() + .cacheIterator(cctx.cacheId(), true, false, AffinityTopologyVersion.NONE, null, null); + + long cnt = 0; + Set<Integer> parts = new TreeSet<>(); + GridDhtPartitionsExchangeFuture lastFut = null; + + for (CacheDataRow row : localRows) { + if (isCancelled()) + break; + + GridDhtPartitionsExchangeFuture fut = exchange.lastFinishedFuture(); Review Comment: let's extract check from 186 line to 197 to method `ensureTopologyNotChanged()` -- This is an automated message from the Apache Git Service. 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