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The following commit(s) were added to refs/heads/master by this push:
     new 566b5222a66 IGNITE-21001 Java Thin Client: Fixed stale client cluster 
group data after cluster restart. (#11173)
566b5222a66 is described below

commit 566b5222a668432f718014886afbeab2f536f8da
Author: Mikhail Petrov <[email protected]>
AuthorDate: Thu Jan 18 14:58:14 2024 +0300

    IGNITE-21001 Java Thin Client: Fixed stale client cluster group data after 
cluster restart. (#11173)
---
 .../client/thin/ClientClusterGroupImpl.java        |  7 +-
 .../thin/ClusterGroupClusterRestartTest.java       | 78 ++++++++++++++++++++++
 .../org/apache/ignite/client/ClientTestSuite.java  |  2 +
 3 files changed, 86 insertions(+), 1 deletion(-)

diff --git 
a/modules/core/src/main/java/org/apache/ignite/internal/client/thin/ClientClusterGroupImpl.java
 
b/modules/core/src/main/java/org/apache/ignite/internal/client/thin/ClientClusterGroupImpl.java
index b33a7caa1d7..5b1154db8a9 100644
--- 
a/modules/core/src/main/java/org/apache/ignite/internal/client/thin/ClientClusterGroupImpl.java
+++ 
b/modules/core/src/main/java/org/apache/ignite/internal/client/thin/ClientClusterGroupImpl.java
@@ -62,6 +62,9 @@ class ClientClusterGroupImpl implements ClientClusterGroup {
     /** Projection filters. */
     private final ProjectionFilters projectionFilters;
 
+    /** Client channel from which the cluster group nodes data was previously 
received. */
+    private ClientChannel topDataSrc;
+
     /** Cached topology version. */
     private long cachedTopVer;
 
@@ -304,7 +307,7 @@ class ClientClusterGroupImpl implements ClientClusterGroup {
                         throw new 
ClientFeatureNotSupportedByServerException(ProtocolBitmaskFeature.CLUSTER_GROUPS);
 
                     try (BinaryRawWriterEx writer = 
utils.createBinaryWriter(req.out())) {
-                        writer.writeLong(cachedTopVer);
+                        writer.writeLong(topDataSrc == null || 
topDataSrc.closed() ? 0 : cachedTopVer);
 
                         projectionFilters.write(writer);
                     }
@@ -328,6 +331,8 @@ class ClientClusterGroupImpl implements ClientClusterGroup {
 
                     cachedNodeIds = nodeIds;
 
+                    topDataSrc = res.clientChannel();
+
                     return new ArrayList<>(nodeIds);
                 });
         }
diff --git 
a/modules/core/src/test/java/org/apache/ignite/internal/client/thin/ClusterGroupClusterRestartTest.java
 
b/modules/core/src/test/java/org/apache/ignite/internal/client/thin/ClusterGroupClusterRestartTest.java
new file mode 100644
index 00000000000..15588bc8828
--- /dev/null
+++ 
b/modules/core/src/test/java/org/apache/ignite/internal/client/thin/ClusterGroupClusterRestartTest.java
@@ -0,0 +1,78 @@
+/*
+ * 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.client.thin;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.stream.Collectors;
+import org.apache.ignite.client.ClientClusterGroup;
+import org.apache.ignite.client.IgniteClient;
+import org.apache.ignite.configuration.IgniteConfiguration;
+import org.junit.Test;
+
+import static 
org.apache.ignite.internal.processors.cache.distributed.GridCacheModuloAffinityFunction.IDX_ATTR;
+
+/** */
+public class ClusterGroupClusterRestartTest extends AbstractThinClientTest {
+    /** {@inheritDoc} */
+    @Override protected IgniteConfiguration getConfiguration(String 
igniteInstanceName) throws Exception {
+        return super.getConfiguration(igniteInstanceName)
+            .setUserAttributes(Collections.singletonMap(IDX_ATTR, 
getTestIgniteInstanceIndex(igniteInstanceName)));
+    }
+
+    /** */
+    @Test
+    public void testGroupNodesAfterClusterRestart() throws Exception {
+        prepareCluster();
+
+        try (IgniteClient client = startClient(0, 1)) {
+            ClientClusterGroup dfltGrp = client.cluster();
+            ClientClusterGroup srvGrp = client.cluster().forServers();
+            ClientClusterGroup cliGrp = client.cluster().forClients();
+            ClientClusterGroup attrGrp = 
client.cluster().forAttribute(IDX_ATTR, 0);
+
+            assertContainsNodes(dfltGrp, 0, 1, 2);
+            assertContainsNodes(srvGrp, 0, 1);
+            assertContainsNodes(cliGrp, 2);
+            assertContainsNodes(attrGrp, 0);
+
+            stopAllGrids();
+
+            prepareCluster();
+
+            assertContainsNodes(dfltGrp, 0, 1, 2);
+            assertContainsNodes(srvGrp, 0, 1);
+            assertContainsNodes(cliGrp, 2);
+            assertContainsNodes(attrGrp, 0);
+        }
+    }
+
+    /** */
+    private void assertContainsNodes(ClientClusterGroup grp, int... nodeIdxs) {
+        
assertTrue(grp.nodes().containsAll(Arrays.stream(nodeIdxs).mapToObj(idx -> 
grid(idx).localNode()).collect(Collectors.toList())));
+
+        for (int idx : nodeIdxs)
+            assertNotNull(grp.node(grid(idx).localNode().id()));
+    }
+
+    /** */
+    private void prepareCluster() throws Exception {
+        startGrids(2);
+        startClientGrid(2);
+    }
+}
diff --git 
a/modules/indexing/src/test/java/org/apache/ignite/client/ClientTestSuite.java 
b/modules/indexing/src/test/java/org/apache/ignite/client/ClientTestSuite.java
index 588715be857..45e55939fed 100644
--- 
a/modules/indexing/src/test/java/org/apache/ignite/client/ClientTestSuite.java
+++ 
b/modules/indexing/src/test/java/org/apache/ignite/client/ClientTestSuite.java
@@ -22,6 +22,7 @@ import org.apache.ignite.internal.client.thin.AtomicLongTest;
 import org.apache.ignite.internal.client.thin.CacheAsyncTest;
 import org.apache.ignite.internal.client.thin.CacheEntryListenersTest;
 import org.apache.ignite.internal.client.thin.ClusterApiTest;
+import org.apache.ignite.internal.client.thin.ClusterGroupClusterRestartTest;
 import org.apache.ignite.internal.client.thin.ClusterGroupTest;
 import org.apache.ignite.internal.client.thin.ComputeTaskTest;
 import org.apache.ignite.internal.client.thin.DataReplicationOperationsTest;
@@ -90,6 +91,7 @@ import org.junit.runners.Suite;
     ThinClientEnpointsDiscoveryTest.class,
     InactiveClusterCacheRequestTest.class,
     AffinityMetricsTest.class,
+    ClusterGroupClusterRestartTest.class
 })
 public class ClientTestSuite {
     // No-op.

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