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Posted to notifications@ignite.apache.org by GitBox <gi...@apache.org> on 2021/11/02 10:45:05 UTC
[GitHub] [ignite] xtern commented on a change in pull request #9534: wip
xtern commented on a change in pull request #9534:
URL: https://github.com/apache/ignite/pull/9534#discussion_r740904230
##########
File path: modules/core/src/main/java/org/apache/ignite/cache/validation/IgnitePluggableSegmentationResolver.java
##########
@@ -0,0 +1,275 @@
+/*
+ * 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.cache.validation;
+
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.stream.Collectors;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.IgniteLogger;
+import org.apache.ignite.cluster.BaselineNode;
+import org.apache.ignite.cluster.ClusterNode;
+import org.apache.ignite.events.DiscoveryEvent;
+import org.apache.ignite.internal.GridKernalContext;
+import org.apache.ignite.internal.cluster.DetachedClusterNode;
+import org.apache.ignite.internal.managers.discovery.CustomEventListener;
+import org.apache.ignite.internal.managers.discovery.DiscoCache;
+import org.apache.ignite.internal.managers.eventstorage.DiscoveryEventListener;
+import org.apache.ignite.internal.managers.eventstorage.HighPriorityListener;
+import org.apache.ignite.internal.processors.affinity.AffinityTopologyVersion;
+import org.apache.ignite.internal.processors.cluster.ChangeGlobalStateFinishMessage;
+import org.apache.ignite.internal.processors.configuration.distributed.DistributedConfigurationLifecycleListener;
+import org.apache.ignite.internal.processors.configuration.distributed.DistributedPropertyDispatcher;
+import org.apache.ignite.internal.processors.configuration.distributed.SimpleDistributedProperty;
+import org.apache.ignite.internal.util.typedef.internal.U;
+import org.apache.ignite.thread.IgniteThreadPoolExecutor;
+import org.apache.ignite.thread.OomExceptionHandler;
+
+import static java.lang.Boolean.TRUE;
+import static org.apache.ignite.cluster.ClusterState.ACTIVE;
+import static org.apache.ignite.cluster.ClusterState.ACTIVE_READ_ONLY;
+import static org.apache.ignite.configuration.IgniteConfiguration.DFLT_THREAD_KEEP_ALIVE_TIME;
+import static org.apache.ignite.events.EventType.EVT_NODE_FAILED;
+import static org.apache.ignite.events.EventType.EVT_NODE_JOINED;
+import static org.apache.ignite.events.EventType.EVT_NODE_LEFT;
+import static org.apache.ignite.internal.cluster.DistributedConfigurationUtils.setDefaultValue;
+import static org.apache.ignite.internal.managers.communication.GridIoPolicy.UNDEFINED;
+
+/** */
+public class IgnitePluggableSegmentationResolver implements PluggableSegmentationResolver {
+ /** */
+ public static final String ATTR_SEG_RESOLVER_CONFIGURED = "org.apache.ignite.segmentation.resolver.configured";
+
+ /** */
+ public static final String SEG_RESOLVER_ENABLED_PROP_NAME = "org.apache.ignite.segmentation.resolver.enabled";
+
+ /** */
+ private static final String SEG_RESOLVER_THREAD_PREFIX = "segmentation-resolver";
+
+ /** */
+ private static final int[] TOP_CHANGED_EVTS = new int[] {
+ EVT_NODE_LEFT,
+ EVT_NODE_JOINED,
+ EVT_NODE_FAILED
+ };
+
+ /** */
+ private final SimpleDistributedProperty<Boolean> segResolverEnabledProp = new SimpleDistributedProperty<>(
+ SEG_RESOLVER_ENABLED_PROP_NAME,
+ Boolean::parseBoolean
+ );
+
+ /** Ignite kernel context. */
+ private final GridKernalContext ctx;
+
+ /** Ignite logger. */
+ private final IgniteLogger log;
+
+ /** */
+ private final IgniteThreadPoolExecutor stateChangeExec;
+
+ /** */
+ private long lastCheckedTopVer;
+
+ /** */
+ private volatile State state = State.VALID;
+
+ /** @param ctx Ignite kernel context. */
+ public IgnitePluggableSegmentationResolver(GridKernalContext ctx) {
+ this.ctx = ctx;
+
+ log = ctx.log(getClass());
+
+ stateChangeExec = new IgniteThreadPoolExecutor(
+ SEG_RESOLVER_THREAD_PREFIX,
+ ctx.igniteInstanceName(),
+ 1,
+ 1,
+ DFLT_THREAD_KEEP_ALIVE_TIME,
+ new LinkedBlockingQueue<>(),
+ UNDEFINED,
+ new OomExceptionHandler(ctx));
+
+ stateChangeExec.allowCoreThreadTimeOut(true);
+ }
+
+ /** {@inheritDoc} */
+ @Override public boolean isValidSegment() {
+ return isDisabled() || state != State.INVALID;
+ }
+
+ /** */
+ public void start() {
+ if (ctx.clientNode())
+ return;
+
+ ctx.addNodeAttribute(ATTR_SEG_RESOLVER_CONFIGURED, true);
+
+ ctx.event().addDiscoveryEventListener(new TopologyChangedEventListener(), TOP_CHANGED_EVTS);
+
+ ctx.discovery().setCustomEventListener(
+ ChangeGlobalStateFinishMessage.class,
+ new ClusterStateChangedEventListener()
+ );
+
+ ctx.internalSubscriptionProcessor().registerDistributedConfigurationListener(
+ new DistributedConfigurationLifecycleListener() {
+ /** {@inheritDoc} */
+ @Override public void onReadyToRegister(DistributedPropertyDispatcher dispatcher) {
+ dispatcher.registerProperty(segResolverEnabledProp);
+ }
+
+ /** {@inheritDoc} */
+ @Override public void onReadyToWrite() {
+ setDefaultValue(segResolverEnabledProp, U.isLocalNodeCoordinator(ctx.discovery()), log);
+ }
+ });
+ }
+
+ /** @return Discovery data. */
+ public Serializable provideDiscoveryData() {
+ return state;
+ }
+
+ /** @param data Discovery data. */
+ public void onDiscoveryDataReceived(Serializable data) {
+ state = (State)data;
+ }
+
+ /** @param node Node. */
+ public void validateNewNode(ClusterNode node) {
+ if (node.isClient())
+ return;
+
+ if (!TRUE.equals(node.attribute(ATTR_SEG_RESOLVER_CONFIGURED))) {
+ throw new IgniteException( "The Segmentation Resolver plugin is not configured for the server node that is" +
+ " trying to join the cluster. Since the Segmentation Resolver is only applicable if all server nodes" +
+ " in the cluster have one, node join request will be rejected [rejectedNodeId=" + node.id() + ']');
+ }
+
+ if (state == State.VALID) {
+ DiscoCache discoCache = ctx.discovery().discoCache(new AffinityTopologyVersion(lastCheckedTopVer, 0));
+
+ if (discoCache != null) {
+ for (ClusterNode srv : discoCache.serverNodes()) {
+ if (!ctx.discovery().alive(srv))
+ throw new IgniteException("Node join request will be rejected due to concurrent node left" +
+ " process handling [rejectedNodeId=" + node.id() + ']');
+ }
+ }
+ }
+ }
+
+ /** */
+ private boolean isDisabled() {
+ Boolean res = segResolverEnabledProp.get();
+
+ return res == null || !res;
+ }
+
+ /** @return return. */
+ private String formatTopologyNodes(Collection<ClusterNode> nodes) {
Review comment:
I suggest moving this method inside the `TopologyChangedEventListener` class.
##########
File path: modules/core/src/main/java/org/apache/ignite/cache/validation/IgnitePluggableSegmentationResolver.java
##########
@@ -0,0 +1,275 @@
+/*
+ * 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.cache.validation;
+
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.stream.Collectors;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.IgniteLogger;
+import org.apache.ignite.cluster.BaselineNode;
+import org.apache.ignite.cluster.ClusterNode;
+import org.apache.ignite.events.DiscoveryEvent;
+import org.apache.ignite.internal.GridKernalContext;
+import org.apache.ignite.internal.cluster.DetachedClusterNode;
+import org.apache.ignite.internal.managers.discovery.CustomEventListener;
+import org.apache.ignite.internal.managers.discovery.DiscoCache;
+import org.apache.ignite.internal.managers.eventstorage.DiscoveryEventListener;
+import org.apache.ignite.internal.managers.eventstorage.HighPriorityListener;
+import org.apache.ignite.internal.processors.affinity.AffinityTopologyVersion;
+import org.apache.ignite.internal.processors.cluster.ChangeGlobalStateFinishMessage;
+import org.apache.ignite.internal.processors.configuration.distributed.DistributedConfigurationLifecycleListener;
+import org.apache.ignite.internal.processors.configuration.distributed.DistributedPropertyDispatcher;
+import org.apache.ignite.internal.processors.configuration.distributed.SimpleDistributedProperty;
+import org.apache.ignite.internal.util.typedef.internal.U;
+import org.apache.ignite.thread.IgniteThreadPoolExecutor;
+import org.apache.ignite.thread.OomExceptionHandler;
+
+import static java.lang.Boolean.TRUE;
+import static org.apache.ignite.cluster.ClusterState.ACTIVE;
+import static org.apache.ignite.cluster.ClusterState.ACTIVE_READ_ONLY;
+import static org.apache.ignite.configuration.IgniteConfiguration.DFLT_THREAD_KEEP_ALIVE_TIME;
+import static org.apache.ignite.events.EventType.EVT_NODE_FAILED;
+import static org.apache.ignite.events.EventType.EVT_NODE_JOINED;
+import static org.apache.ignite.events.EventType.EVT_NODE_LEFT;
+import static org.apache.ignite.internal.cluster.DistributedConfigurationUtils.setDefaultValue;
+import static org.apache.ignite.internal.managers.communication.GridIoPolicy.UNDEFINED;
+
+/** */
+public class IgnitePluggableSegmentationResolver implements PluggableSegmentationResolver {
+ /** */
+ public static final String ATTR_SEG_RESOLVER_CONFIGURED = "org.apache.ignite.segmentation.resolver.configured";
+
+ /** */
+ public static final String SEG_RESOLVER_ENABLED_PROP_NAME = "org.apache.ignite.segmentation.resolver.enabled";
+
+ /** */
+ private static final String SEG_RESOLVER_THREAD_PREFIX = "segmentation-resolver";
+
+ /** */
+ private static final int[] TOP_CHANGED_EVTS = new int[] {
+ EVT_NODE_LEFT,
+ EVT_NODE_JOINED,
+ EVT_NODE_FAILED
+ };
+
+ /** */
+ private final SimpleDistributedProperty<Boolean> segResolverEnabledProp = new SimpleDistributedProperty<>(
+ SEG_RESOLVER_ENABLED_PROP_NAME,
+ Boolean::parseBoolean
+ );
+
+ /** Ignite kernel context. */
+ private final GridKernalContext ctx;
+
+ /** Ignite logger. */
+ private final IgniteLogger log;
+
+ /** */
+ private final IgniteThreadPoolExecutor stateChangeExec;
+
+ /** */
+ private long lastCheckedTopVer;
+
+ /** */
+ private volatile State state = State.VALID;
+
+ /** @param ctx Ignite kernel context. */
+ public IgnitePluggableSegmentationResolver(GridKernalContext ctx) {
+ this.ctx = ctx;
+
+ log = ctx.log(getClass());
+
+ stateChangeExec = new IgniteThreadPoolExecutor(
+ SEG_RESOLVER_THREAD_PREFIX,
+ ctx.igniteInstanceName(),
+ 1,
+ 1,
+ DFLT_THREAD_KEEP_ALIVE_TIME,
+ new LinkedBlockingQueue<>(),
+ UNDEFINED,
+ new OomExceptionHandler(ctx));
+
+ stateChangeExec.allowCoreThreadTimeOut(true);
+ }
+
+ /** {@inheritDoc} */
+ @Override public boolean isValidSegment() {
+ return isDisabled() || state != State.INVALID;
+ }
+
+ /** */
+ public void start() {
+ if (ctx.clientNode())
+ return;
+
+ ctx.addNodeAttribute(ATTR_SEG_RESOLVER_CONFIGURED, true);
+
+ ctx.event().addDiscoveryEventListener(new TopologyChangedEventListener(), TOP_CHANGED_EVTS);
+
+ ctx.discovery().setCustomEventListener(
+ ChangeGlobalStateFinishMessage.class,
+ new ClusterStateChangedEventListener()
+ );
+
+ ctx.internalSubscriptionProcessor().registerDistributedConfigurationListener(
+ new DistributedConfigurationLifecycleListener() {
+ /** {@inheritDoc} */
+ @Override public void onReadyToRegister(DistributedPropertyDispatcher dispatcher) {
+ dispatcher.registerProperty(segResolverEnabledProp);
+ }
+
+ /** {@inheritDoc} */
+ @Override public void onReadyToWrite() {
+ setDefaultValue(segResolverEnabledProp, U.isLocalNodeCoordinator(ctx.discovery()), log);
+ }
+ });
+ }
+
+ /** @return Discovery data. */
+ public Serializable provideDiscoveryData() {
+ return state;
+ }
+
+ /** @param data Discovery data. */
+ public void onDiscoveryDataReceived(Serializable data) {
+ state = (State)data;
+ }
+
+ /** @param node Node. */
+ public void validateNewNode(ClusterNode node) {
+ if (node.isClient())
+ return;
+
+ if (!TRUE.equals(node.attribute(ATTR_SEG_RESOLVER_CONFIGURED))) {
+ throw new IgniteException( "The Segmentation Resolver plugin is not configured for the server node that is" +
+ " trying to join the cluster. Since the Segmentation Resolver is only applicable if all server nodes" +
+ " in the cluster have one, node join request will be rejected [rejectedNodeId=" + node.id() + ']');
+ }
+
+ if (state == State.VALID) {
+ DiscoCache discoCache = ctx.discovery().discoCache(new AffinityTopologyVersion(lastCheckedTopVer, 0));
+
+ if (discoCache != null) {
+ for (ClusterNode srv : discoCache.serverNodes()) {
+ if (!ctx.discovery().alive(srv))
+ throw new IgniteException("Node join request will be rejected due to concurrent node left" +
+ " process handling [rejectedNodeId=" + node.id() + ']');
+ }
+ }
+ }
+ }
+
+ /** */
+ private boolean isDisabled() {
+ Boolean res = segResolverEnabledProp.get();
+
+ return res == null || !res;
+ }
+
+ /** @return return. */
+ private String formatTopologyNodes(Collection<ClusterNode> nodes) {
+ return nodes.stream().map(n -> n.id().toString()).collect(Collectors.joining(", "));
+ }
+
+ /** */
+ private class TopologyChangedEventListener implements DiscoveryEventListener, HighPriorityListener {
+ /** {@inheritDoc} */
+ @Override public void onEvent(DiscoveryEvent evt, DiscoCache discoCache) {
+ lastCheckedTopVer = evt.topologyVersion();
+
+ if (isDisabled())
+ return;
+
+ if (state == State.VALID && evt.type() == EVT_NODE_FAILED) {
+ List<? extends BaselineNode> baselineNodes = discoCache.baselineNodes();
+
+ if (baselineNodes != null && aliveBaselineNodes(baselineNodes) < baselineNodes.size() / 2 + 1) {
+ state = State.INVALID;
+
+ stateChangeExec.execute(() -> {
+ try {
+ ctx.cluster().get().state(ACTIVE_READ_ONLY);
+ }
+ catch (Throwable e) {
+ U.error(
+ log,
+ "Failed to automatically switch state of the segmented cluster to the READ-ONLY mode" +
+ " [segmentedNodes=" + formatTopologyNodes(discoCache.allNodes()) + "]. Cache writes" +
+ " are already restricted for all configured caches, but this step is still required" +
+ " in order to be able to unlock cache writes in the future. Retry this operation" +
+ " manually, if possible.",
+ e
+ );
+ }
+ });
+
+ U.warn(log, "Cluster segmentation was detected [segmentedNodes=" +
+ formatTopologyNodes(discoCache.allNodes()) + ']');
+ }
+ }
+
+ if (ctx.state().isBaselineAutoAdjustEnabled())
+ U.warn(log, "Segmentation Resolver requires baseline to be configured. If no baseline is" +
+ " set, any topology change is considered valid.");
+ }
+
+ /** {@inheritDoc} */
+ @Override public int order() {
+ return 0;
+ }
+
+ /** */
+ private int aliveBaselineNodes(Collection<? extends BaselineNode> baselineNodes) {
+ int res = 0;
+
+ for (BaselineNode node : baselineNodes) {
+ if (!(node instanceof DetachedClusterNode))
+ ++res;
+ }
+
+ return res;
+ }
+ }
+
+ /** */
+ private class ClusterStateChangedEventListener implements CustomEventListener<ChangeGlobalStateFinishMessage> {
Review comment:
From my point of view, it would be better to "inline" this class.
##########
File path: modules/core/src/main/java/org/apache/ignite/cache/validation/IgnitePluggableSegmentationResolver.java
##########
@@ -0,0 +1,275 @@
+/*
+ * 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.cache.validation;
+
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.stream.Collectors;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.IgniteLogger;
+import org.apache.ignite.cluster.BaselineNode;
+import org.apache.ignite.cluster.ClusterNode;
+import org.apache.ignite.events.DiscoveryEvent;
+import org.apache.ignite.internal.GridKernalContext;
+import org.apache.ignite.internal.cluster.DetachedClusterNode;
+import org.apache.ignite.internal.managers.discovery.CustomEventListener;
+import org.apache.ignite.internal.managers.discovery.DiscoCache;
+import org.apache.ignite.internal.managers.eventstorage.DiscoveryEventListener;
+import org.apache.ignite.internal.managers.eventstorage.HighPriorityListener;
+import org.apache.ignite.internal.processors.affinity.AffinityTopologyVersion;
+import org.apache.ignite.internal.processors.cluster.ChangeGlobalStateFinishMessage;
+import org.apache.ignite.internal.processors.configuration.distributed.DistributedConfigurationLifecycleListener;
+import org.apache.ignite.internal.processors.configuration.distributed.DistributedPropertyDispatcher;
+import org.apache.ignite.internal.processors.configuration.distributed.SimpleDistributedProperty;
+import org.apache.ignite.internal.util.typedef.internal.U;
+import org.apache.ignite.thread.IgniteThreadPoolExecutor;
+import org.apache.ignite.thread.OomExceptionHandler;
+
+import static java.lang.Boolean.TRUE;
+import static org.apache.ignite.cluster.ClusterState.ACTIVE;
+import static org.apache.ignite.cluster.ClusterState.ACTIVE_READ_ONLY;
+import static org.apache.ignite.configuration.IgniteConfiguration.DFLT_THREAD_KEEP_ALIVE_TIME;
+import static org.apache.ignite.events.EventType.EVT_NODE_FAILED;
+import static org.apache.ignite.events.EventType.EVT_NODE_JOINED;
+import static org.apache.ignite.events.EventType.EVT_NODE_LEFT;
+import static org.apache.ignite.internal.cluster.DistributedConfigurationUtils.setDefaultValue;
+import static org.apache.ignite.internal.managers.communication.GridIoPolicy.UNDEFINED;
+
+/** */
+public class IgnitePluggableSegmentationResolver implements PluggableSegmentationResolver {
+ /** */
+ public static final String ATTR_SEG_RESOLVER_CONFIGURED = "org.apache.ignite.segmentation.resolver.configured";
+
+ /** */
+ public static final String SEG_RESOLVER_ENABLED_PROP_NAME = "org.apache.ignite.segmentation.resolver.enabled";
+
+ /** */
+ private static final String SEG_RESOLVER_THREAD_PREFIX = "segmentation-resolver";
+
+ /** */
+ private static final int[] TOP_CHANGED_EVTS = new int[] {
+ EVT_NODE_LEFT,
+ EVT_NODE_JOINED,
+ EVT_NODE_FAILED
+ };
+
+ /** */
+ private final SimpleDistributedProperty<Boolean> segResolverEnabledProp = new SimpleDistributedProperty<>(
+ SEG_RESOLVER_ENABLED_PROP_NAME,
+ Boolean::parseBoolean
+ );
+
+ /** Ignite kernel context. */
+ private final GridKernalContext ctx;
+
+ /** Ignite logger. */
+ private final IgniteLogger log;
+
+ /** */
+ private final IgniteThreadPoolExecutor stateChangeExec;
+
+ /** */
+ private long lastCheckedTopVer;
+
+ /** */
+ private volatile State state = State.VALID;
+
+ /** @param ctx Ignite kernel context. */
+ public IgnitePluggableSegmentationResolver(GridKernalContext ctx) {
+ this.ctx = ctx;
+
+ log = ctx.log(getClass());
+
+ stateChangeExec = new IgniteThreadPoolExecutor(
+ SEG_RESOLVER_THREAD_PREFIX,
+ ctx.igniteInstanceName(),
+ 1,
+ 1,
+ DFLT_THREAD_KEEP_ALIVE_TIME,
+ new LinkedBlockingQueue<>(),
+ UNDEFINED,
+ new OomExceptionHandler(ctx));
+
+ stateChangeExec.allowCoreThreadTimeOut(true);
+ }
+
+ /** {@inheritDoc} */
+ @Override public boolean isValidSegment() {
+ return isDisabled() || state != State.INVALID;
+ }
+
+ /** */
+ public void start() {
+ if (ctx.clientNode())
+ return;
+
+ ctx.addNodeAttribute(ATTR_SEG_RESOLVER_CONFIGURED, true);
+
+ ctx.event().addDiscoveryEventListener(new TopologyChangedEventListener(), TOP_CHANGED_EVTS);
+
+ ctx.discovery().setCustomEventListener(
+ ChangeGlobalStateFinishMessage.class,
+ new ClusterStateChangedEventListener()
+ );
+
+ ctx.internalSubscriptionProcessor().registerDistributedConfigurationListener(
+ new DistributedConfigurationLifecycleListener() {
+ /** {@inheritDoc} */
+ @Override public void onReadyToRegister(DistributedPropertyDispatcher dispatcher) {
+ dispatcher.registerProperty(segResolverEnabledProp);
+ }
+
+ /** {@inheritDoc} */
+ @Override public void onReadyToWrite() {
+ setDefaultValue(segResolverEnabledProp, U.isLocalNodeCoordinator(ctx.discovery()), log);
+ }
+ });
+ }
+
+ /** @return Discovery data. */
+ public Serializable provideDiscoveryData() {
+ return state;
+ }
+
+ /** @param data Discovery data. */
+ public void onDiscoveryDataReceived(Serializable data) {
+ state = (State)data;
+ }
+
+ /** @param node Node. */
+ public void validateNewNode(ClusterNode node) {
+ if (node.isClient())
+ return;
+
+ if (!TRUE.equals(node.attribute(ATTR_SEG_RESOLVER_CONFIGURED))) {
+ throw new IgniteException( "The Segmentation Resolver plugin is not configured for the server node that is" +
+ " trying to join the cluster. Since the Segmentation Resolver is only applicable if all server nodes" +
+ " in the cluster have one, node join request will be rejected [rejectedNodeId=" + node.id() + ']');
+ }
+
+ if (state == State.VALID) {
+ DiscoCache discoCache = ctx.discovery().discoCache(new AffinityTopologyVersion(lastCheckedTopVer, 0));
+
+ if (discoCache != null) {
+ for (ClusterNode srv : discoCache.serverNodes()) {
+ if (!ctx.discovery().alive(srv))
+ throw new IgniteException("Node join request will be rejected due to concurrent node left" +
+ " process handling [rejectedNodeId=" + node.id() + ']');
+ }
+ }
+ }
+ }
+
+ /** */
+ private boolean isDisabled() {
+ Boolean res = segResolverEnabledProp.get();
+
+ return res == null || !res;
+ }
+
+ /** @return return. */
+ private String formatTopologyNodes(Collection<ClusterNode> nodes) {
+ return nodes.stream().map(n -> n.id().toString()).collect(Collectors.joining(", "));
+ }
+
+ /** */
+ private class TopologyChangedEventListener implements DiscoveryEventListener, HighPriorityListener {
+ /** {@inheritDoc} */
+ @Override public void onEvent(DiscoveryEvent evt, DiscoCache discoCache) {
+ lastCheckedTopVer = evt.topologyVersion();
+
+ if (isDisabled())
+ return;
+
+ if (state == State.VALID && evt.type() == EVT_NODE_FAILED) {
+ List<? extends BaselineNode> baselineNodes = discoCache.baselineNodes();
+
+ if (baselineNodes != null && aliveBaselineNodes(baselineNodes) < baselineNodes.size() / 2 + 1) {
+ state = State.INVALID;
+
+ stateChangeExec.execute(() -> {
+ try {
+ ctx.cluster().get().state(ACTIVE_READ_ONLY);
+ }
+ catch (Throwable e) {
+ U.error(
+ log,
+ "Failed to automatically switch state of the segmented cluster to the READ-ONLY mode" +
+ " [segmentedNodes=" + formatTopologyNodes(discoCache.allNodes()) + "]. Cache writes" +
+ " are already restricted for all configured caches, but this step is still required" +
+ " in order to be able to unlock cache writes in the future. Retry this operation" +
+ " manually, if possible.",
+ e
+ );
+ }
+ });
+
+ U.warn(log, "Cluster segmentation was detected [segmentedNodes=" +
+ formatTopologyNodes(discoCache.allNodes()) + ']');
+ }
+ }
+
+ if (ctx.state().isBaselineAutoAdjustEnabled())
Review comment:
As I understand it, the problem with auto-adjustment is not that the baseline has not been set, but that it is being set before the resolver gets current baseline nodes.
For example, `testConsequentSegmentationResolving` can be passed without disabling auto-adjustement if we set an auto-adjustement timeout `srv.cluster().BaselineAutoAdjustTimeout(1_000)`.
So, I see 2 options here:
1. get the previous baseline (before the last auto-adjustment that was caused by the top change, if possible) when getting the baseline nodes.
2. correct the warning message that baseline auto-adjustment is enabled and the segmentation resolver may not work at all. This one seems strange because in in-memory cluster this is the default behavior.
##########
File path: modules/core/src/main/java/org/apache/ignite/cache/validation/IgnitePluggableSegmentationResolver.java
##########
@@ -0,0 +1,275 @@
+/*
+ * 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.cache.validation;
+
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.stream.Collectors;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.IgniteLogger;
+import org.apache.ignite.cluster.BaselineNode;
+import org.apache.ignite.cluster.ClusterNode;
+import org.apache.ignite.events.DiscoveryEvent;
+import org.apache.ignite.internal.GridKernalContext;
+import org.apache.ignite.internal.cluster.DetachedClusterNode;
+import org.apache.ignite.internal.managers.discovery.CustomEventListener;
+import org.apache.ignite.internal.managers.discovery.DiscoCache;
+import org.apache.ignite.internal.managers.eventstorage.DiscoveryEventListener;
+import org.apache.ignite.internal.managers.eventstorage.HighPriorityListener;
+import org.apache.ignite.internal.processors.affinity.AffinityTopologyVersion;
+import org.apache.ignite.internal.processors.cluster.ChangeGlobalStateFinishMessage;
+import org.apache.ignite.internal.processors.configuration.distributed.DistributedConfigurationLifecycleListener;
+import org.apache.ignite.internal.processors.configuration.distributed.DistributedPropertyDispatcher;
+import org.apache.ignite.internal.processors.configuration.distributed.SimpleDistributedProperty;
+import org.apache.ignite.internal.util.typedef.internal.U;
+import org.apache.ignite.thread.IgniteThreadPoolExecutor;
+import org.apache.ignite.thread.OomExceptionHandler;
+
+import static java.lang.Boolean.TRUE;
+import static org.apache.ignite.cluster.ClusterState.ACTIVE;
+import static org.apache.ignite.cluster.ClusterState.ACTIVE_READ_ONLY;
+import static org.apache.ignite.configuration.IgniteConfiguration.DFLT_THREAD_KEEP_ALIVE_TIME;
+import static org.apache.ignite.events.EventType.EVT_NODE_FAILED;
+import static org.apache.ignite.events.EventType.EVT_NODE_JOINED;
+import static org.apache.ignite.events.EventType.EVT_NODE_LEFT;
+import static org.apache.ignite.internal.cluster.DistributedConfigurationUtils.setDefaultValue;
+import static org.apache.ignite.internal.managers.communication.GridIoPolicy.UNDEFINED;
+
+/** */
+public class IgnitePluggableSegmentationResolver implements PluggableSegmentationResolver {
+ /** */
+ public static final String ATTR_SEG_RESOLVER_CONFIGURED = "org.apache.ignite.segmentation.resolver.configured";
+
+ /** */
+ public static final String SEG_RESOLVER_ENABLED_PROP_NAME = "org.apache.ignite.segmentation.resolver.enabled";
+
+ /** */
+ private static final String SEG_RESOLVER_THREAD_PREFIX = "segmentation-resolver";
+
+ /** */
+ private static final int[] TOP_CHANGED_EVTS = new int[] {
+ EVT_NODE_LEFT,
+ EVT_NODE_JOINED,
+ EVT_NODE_FAILED
+ };
+
+ /** */
+ private final SimpleDistributedProperty<Boolean> segResolverEnabledProp = new SimpleDistributedProperty<>(
+ SEG_RESOLVER_ENABLED_PROP_NAME,
+ Boolean::parseBoolean
+ );
+
+ /** Ignite kernel context. */
+ private final GridKernalContext ctx;
+
+ /** Ignite logger. */
+ private final IgniteLogger log;
+
+ /** */
+ private final IgniteThreadPoolExecutor stateChangeExec;
+
+ /** */
+ private long lastCheckedTopVer;
+
+ /** */
+ private volatile State state = State.VALID;
+
+ /** @param ctx Ignite kernel context. */
+ public IgnitePluggableSegmentationResolver(GridKernalContext ctx) {
+ this.ctx = ctx;
+
+ log = ctx.log(getClass());
+
+ stateChangeExec = new IgniteThreadPoolExecutor(
+ SEG_RESOLVER_THREAD_PREFIX,
+ ctx.igniteInstanceName(),
+ 1,
+ 1,
+ DFLT_THREAD_KEEP_ALIVE_TIME,
+ new LinkedBlockingQueue<>(),
+ UNDEFINED,
+ new OomExceptionHandler(ctx));
+
+ stateChangeExec.allowCoreThreadTimeOut(true);
+ }
+
+ /** {@inheritDoc} */
+ @Override public boolean isValidSegment() {
+ return isDisabled() || state != State.INVALID;
+ }
+
+ /** */
+ public void start() {
+ if (ctx.clientNode())
+ return;
+
+ ctx.addNodeAttribute(ATTR_SEG_RESOLVER_CONFIGURED, true);
+
+ ctx.event().addDiscoveryEventListener(new TopologyChangedEventListener(), TOP_CHANGED_EVTS);
+
+ ctx.discovery().setCustomEventListener(
+ ChangeGlobalStateFinishMessage.class,
+ new ClusterStateChangedEventListener()
+ );
+
+ ctx.internalSubscriptionProcessor().registerDistributedConfigurationListener(
+ new DistributedConfigurationLifecycleListener() {
+ /** {@inheritDoc} */
+ @Override public void onReadyToRegister(DistributedPropertyDispatcher dispatcher) {
+ dispatcher.registerProperty(segResolverEnabledProp);
+ }
+
+ /** {@inheritDoc} */
+ @Override public void onReadyToWrite() {
+ setDefaultValue(segResolverEnabledProp, U.isLocalNodeCoordinator(ctx.discovery()), log);
+ }
+ });
+ }
+
+ /** @return Discovery data. */
+ public Serializable provideDiscoveryData() {
+ return state;
+ }
+
+ /** @param data Discovery data. */
+ public void onDiscoveryDataReceived(Serializable data) {
+ state = (State)data;
+ }
+
+ /** @param node Node. */
+ public void validateNewNode(ClusterNode node) {
+ if (node.isClient())
+ return;
+
+ if (!TRUE.equals(node.attribute(ATTR_SEG_RESOLVER_CONFIGURED))) {
+ throw new IgniteException( "The Segmentation Resolver plugin is not configured for the server node that is" +
+ " trying to join the cluster. Since the Segmentation Resolver is only applicable if all server nodes" +
+ " in the cluster have one, node join request will be rejected [rejectedNodeId=" + node.id() + ']');
+ }
+
+ if (state == State.VALID) {
+ DiscoCache discoCache = ctx.discovery().discoCache(new AffinityTopologyVersion(lastCheckedTopVer, 0));
+
+ if (discoCache != null) {
+ for (ClusterNode srv : discoCache.serverNodes()) {
+ if (!ctx.discovery().alive(srv))
+ throw new IgniteException("Node join request will be rejected due to concurrent node left" +
+ " process handling [rejectedNodeId=" + node.id() + ']');
+ }
+ }
+ }
+ }
+
+ /** */
+ private boolean isDisabled() {
+ Boolean res = segResolverEnabledProp.get();
+
+ return res == null || !res;
+ }
+
+ /** @return return. */
+ private String formatTopologyNodes(Collection<ClusterNode> nodes) {
+ return nodes.stream().map(n -> n.id().toString()).collect(Collectors.joining(", "));
+ }
+
+ /** */
+ private class TopologyChangedEventListener implements DiscoveryEventListener, HighPriorityListener {
+ /** {@inheritDoc} */
+ @Override public void onEvent(DiscoveryEvent evt, DiscoCache discoCache) {
+ lastCheckedTopVer = evt.topologyVersion();
+
+ if (isDisabled())
+ return;
+
+ if (state == State.VALID && evt.type() == EVT_NODE_FAILED) {
Review comment:
When we change cluster state **to** read-only is treated as CLUSTER_WRITE_BLOCKED, but if we start the cluster in the read-only mode (`clusterStateOnStart` config property) it will be treated as "VALID" and this code block executes on segmentation.
MB we should check the cluster state also.
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