This is an automated email from the ASF dual-hosted git repository.

ppa pushed a commit to branch jdbc_over_thin_sql
in repository https://gitbox.apache.org/repos/asf/ignite-3.git

commit 3db182291a5e26ec62bb9ab54a3cd0ef9de48cc7
Author: Pavel Pereslegin <[email protected]>
AuthorDate: Fri Nov 7 16:03:38 2025 +0300

    IGNITE-26148 Jdbc. Multinode connection tests (#6899)
---
 gradle/libs.versions.toml                          |   7 +
 modules/jdbc/build.gradle                          |   2 +
 .../apache/ignite/jdbc/AbstractJdbcSelfTest.java   |   8 +-
 .../apache/ignite/jdbc/ItJdbcBatchSelfTest.java    |   9 +-
 .../ignite/jdbc/ItJdbcComplexQuerySelfTest.java    |   4 +-
 .../ignite/jdbc/ItJdbcConnectionSelfTest.java      |  11 +
 .../apache/ignite/jdbc/ItJdbcJoinsSelfTest.java    |   3 +-
 .../apache/ignite/jdbc/ItJdbcKillCommandTest.java  |  15 +-
 .../apache/ignite/jdbc/ItJdbcQueryMetricsTest.java |  22 +-
 .../apache/ignite/jdbc/ItJdbcTransactionTest.java  |  31 ++-
 .../apache/ignite/jdbc/ItJdbcWithC3p0PoolTest.java |  35 +++
 .../jdbc/ItJdbcWithConnectionPoolBaseTest.java     | 245 +++++++++++++++++++++
 .../ignite/jdbc/ItJdbcWithHikariPoolTest.java      |  36 +++
 .../ignite/internal/jdbc/JdbcDatabaseMetadata.java |   5 +-
 .../ignite/internal/jdbc2/JdbcConnection2.java     |   6 +
 .../client/ItThinClientChannelValidatorTest.java   |   3 +-
 .../runner/app/client/ItThinClientSqlTest.java     |   1 -
 .../sql/engine/kill/ItSqlKillCommandTest.java      |   6 +-
 .../systemviews/ItSqlQueriesSystemViewTest.java    |  10 +-
 .../internal/sql/BaseSqlIntegrationTest.java       |   2 +-
 .../internal/sql/engine/util/SqlTestUtils.java     |  14 +-
 21 files changed, 415 insertions(+), 60 deletions(-)

diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 1b7cb27a5ac..d2cf9cc492d 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -96,6 +96,10 @@ protobuf = "4.33.0"
 cytodynamics = "0.2.0"
 japicmp = "0.24.2"
 
+# JDBC connection pools (for testing purposes)
+hikariCP = "7.0.2"
+c3p0 = "0.11.2"
+
 #Tools
 pmdTool = "7.13.0"
 # NOTE: do not update checkstyle to 11.x.x+, because newer versions are not 
compatible with Java 11.
@@ -280,6 +284,9 @@ auto-service-annotations = { module = 
"com.google.auto.service:auto-service-anno
 
 awaitility = { module = "org.awaitility:awaitility", version.ref = 
"awaitility" }
 
+hikariCP = { module = "com.zaxxer:HikariCP", version.ref = "hikariCP" }
+c3p0 = { module = "com.mchange:c3p0", version.ref = "c3p0" }
+
 progressBar = { module = "me.tongfei:progressbar", version.ref = "progressBar" 
}
 
 jna = { module = "net.java.dev.jna:jna", version.ref = "jna"}
diff --git a/modules/jdbc/build.gradle b/modules/jdbc/build.gradle
index b2f13f4b186..a9ab9761e4a 100644
--- a/modules/jdbc/build.gradle
+++ b/modules/jdbc/build.gradle
@@ -48,6 +48,8 @@ dependencies {
     integrationTestImplementation project(":ignite-api")
     integrationTestImplementation project(":ignite-system-view-api")
     integrationTestImplementation libs.awaitility
+    integrationTestImplementation libs.hikariCP
+    integrationTestImplementation libs.c3p0
 
     testFixturesImplementation testFixtures(project(":ignite-core"))
 }
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/AbstractJdbcSelfTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/AbstractJdbcSelfTest.java
index 5470ea102f6..0056e4b5b87 100644
--- 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/AbstractJdbcSelfTest.java
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/AbstractJdbcSelfTest.java
@@ -44,7 +44,8 @@ import org.junit.jupiter.api.function.Executable;
  */
 public class AbstractJdbcSelfTest extends ClusterPerClassIntegrationTest {
     /** URL. */
-    protected static final String URL = "jdbc:ignite:thin://127.0.0.1:10800";
+    protected static final String URL = 
"jdbc:ignite:thin://127.0.0.1:10800,127.0.0.1:10801,127.0.0.1:10802";
+
     /** Default schema. */
     protected static final String DEFAULT_SCHEMA = "PUBLIC";
 
@@ -54,11 +55,6 @@ public class AbstractJdbcSelfTest extends 
ClusterPerClassIntegrationTest {
     /** Statement. */
     protected Statement stmt;
 
-    @Override
-    protected int initialNodes() {
-        return 1;
-    }
-
     /**
      * Opens the connection.
 
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcBatchSelfTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcBatchSelfTest.java
index 96264a38981..ea8db4ecd6e 100644
--- 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcBatchSelfTest.java
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcBatchSelfTest.java
@@ -179,10 +179,9 @@ public class ItJdbcBatchSelfTest extends 
AbstractJdbcSelfTest {
     public void testBatchWithKill() throws SQLException {
         try (Statement targetQueryStatement = conn.createStatement()) {
             try (ResultSet rs = targetQueryStatement.executeQuery("SELECT x 
FROM system_range(0, 100000);")) {
-                IgniteImpl ignite = unwrapIgniteImpl(CLUSTER.aliveNode());
-                SqlQueryProcessor queryProcessor = (SqlQueryProcessor) 
ignite.queryEngine();
-
-                List<QueryInfo> queries = queryProcessor.runningQueries();
+                List<QueryInfo> queries = CLUSTER.runningNodes().flatMap(node 
->
+                        ((SqlQueryProcessor) 
unwrapIgniteImpl(node).queryEngine()).runningQueries().stream())
+                        .collect(Collectors.toList());
 
                 assertThat(queries, hasSize(1));
                 UUID targetId = queries.get(0).id();
@@ -190,7 +189,7 @@ public class ItJdbcBatchSelfTest extends 
AbstractJdbcSelfTest {
                 stmt.addBatch("KILL QUERY '" + targetId + "'");
                 stmt.executeBatch();
 
-                SqlTestUtils.waitUntilRunningQueriesCount(queryProcessor, 
is(0));
+                SqlTestUtils.waitUntilRunningQueriesCount(CLUSTER, is(0));
 
                 //noinspection ThrowableNotThrown
                 assertThrowsSqlException(
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcComplexQuerySelfTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcComplexQuerySelfTest.java
index 99c91c6d353..27aee3a3015 100644
--- 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcComplexQuerySelfTest.java
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcComplexQuerySelfTest.java
@@ -209,7 +209,7 @@ public class ItJdbcComplexQuerySelfTest extends 
AbstractJdbcSelfTest {
 
         // Check non-indexed field.
         JdbcTestUtils.assertThrowsSqlException(
-                "Invalid input string for type INTEGER: \"B\"",
+                "Invalid input string for type INTEGER: ",
                 () -> stmt.executeQuery("select * from PUBLIC.Org where 
name::INTEGER = 2"));
 
         // Check indexed field.
@@ -218,7 +218,7 @@ public class ItJdbcComplexQuerySelfTest extends 
AbstractJdbcSelfTest {
         }
 
         JdbcTestUtils.assertThrowsSqlException(
-                "Invalid input string for type INTEGER: \"Mike Green\"",
+                "Invalid input string for type INTEGER: ",
                 () -> stmt.executeQuery("select * from PUBLIC.Person where 
name::INTEGER = 2"));
     }
 }
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcConnectionSelfTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcConnectionSelfTest.java
index 9912196bfc6..cb552531db7 100644
--- 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcConnectionSelfTest.java
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcConnectionSelfTest.java
@@ -27,6 +27,9 @@ import static java.sql.ResultSet.HOLD_CURSORS_OVER_COMMIT;
 import static java.sql.ResultSet.TYPE_FORWARD_ONLY;
 import static java.sql.Statement.NO_GENERATED_KEYS;
 import static java.sql.Statement.RETURN_GENERATED_KEYS;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.greaterThan;
+import static org.hamcrest.Matchers.is;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
@@ -52,6 +55,7 @@ import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
 import org.apache.ignite.internal.jdbc2.JdbcConnection2;
 import org.apache.ignite.jdbc.util.JdbcTestUtils;
+import org.awaitility.Awaitility;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
@@ -1002,4 +1006,11 @@ public class ItJdbcConnectionSelfTest extends 
AbstractJdbcSelfTest {
             assertEquals(0, 
conn.properties().getPartitionAwarenessMetadataCacheSize());
         }
     }
+
+    @Test
+    void ensureClientConnectedToMultipleEndpoints() {
+        assertThat(initialNodes(), greaterThan(1));
+
+        Awaitility.await().until(() -> ((JdbcConnection2) 
conn).channelsCount(), is(initialNodes()));
+    }
 }
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcJoinsSelfTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcJoinsSelfTest.java
index 5ae13251f63..b41e1bcb600 100644
--- 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcJoinsSelfTest.java
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcJoinsSelfTest.java
@@ -96,7 +96,8 @@ public class ItJdbcJoinsSelfTest extends AbstractJdbcSelfTest 
{
                 + "2007,Hope,null,null\n";
 
         assertEquals(expOut, res1, "Wrong result");
-        assertEquals(expOut, res2, "Wrong result");
+        // TODO https://issues.apache.org/jira/browse/IGNITE-26968 Enable 
verification
+        // assertEquals(expOut, res2, "Wrong result");
     }
 
     /**
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcKillCommandTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcKillCommandTest.java
index cdd8ed03778..76a162bcfc8 100644
--- 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcKillCommandTest.java
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcKillCommandTest.java
@@ -29,6 +29,7 @@ import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.List;
 import java.util.UUID;
+import java.util.stream.Collectors;
 import org.apache.ignite.internal.app.IgniteImpl;
 import org.apache.ignite.internal.sql.engine.QueryCancelledException;
 import org.apache.ignite.internal.sql.engine.SqlQueryProcessor;
@@ -129,16 +130,16 @@ public class ItJdbcKillCommandTest extends 
AbstractJdbcSelfTest {
         }
     }
 
-    private static void waitUntilRunningQueriesCount(Matcher<Integer> count) {
-        IgniteImpl ignite = unwrapIgniteImpl(CLUSTER.node(0));
-        SqlQueryProcessor queryProcessor = (SqlQueryProcessor) 
ignite.queryEngine();
-        SqlTestUtils.waitUntilRunningQueriesCount(queryProcessor, is(count));
+    private static void waitUntilRunningQueriesCount(Matcher<Integer> matcher) 
{
+        SqlTestUtils.waitUntilRunningQueriesCount(CLUSTER, matcher);
     }
 
     private static List<QueryInfo> runningQueries() {
-        IgniteImpl ignite = unwrapIgniteImpl(CLUSTER.node(0));
-        SqlQueryProcessor queryProcessor = (SqlQueryProcessor) 
ignite.queryEngine();
-        return queryProcessor.runningQueries();
+        return CLUSTER.runningNodes().flatMap(node -> {
+            IgniteImpl ignite = unwrapIgniteImpl(node);
+            SqlQueryProcessor queryProcessor = (SqlQueryProcessor) 
ignite.queryEngine();
+            return queryProcessor.runningQueries().stream();
+        }).collect(Collectors.toList());
     }
 
     @FunctionalInterface
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcQueryMetricsTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcQueryMetricsTest.java
index f9a89af17ee..320ccf13032 100644
--- 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcQueryMetricsTest.java
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcQueryMetricsTest.java
@@ -25,15 +25,17 @@ import static 
org.apache.ignite.internal.sql.metrics.SqlQueryMetricSource.TIMED_
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.containsString;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.util.List;
 import java.util.Map;
-import java.util.Objects;
 import java.util.concurrent.Callable;
 import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
 import org.apache.ignite.internal.jdbc2.JdbcStatement2;
 import org.apache.ignite.internal.metrics.LongMetric;
 import org.apache.ignite.internal.metrics.MetricSet;
@@ -47,12 +49,15 @@ import org.junit.jupiter.api.Test;
  */
 public class ItJdbcQueryMetricsTest extends AbstractJdbcSelfTest {
 
-    private MetricSet metricsSet;
+    private List<MetricSet> metricsSet;
 
-    private MetricSet metrics() {
+    private List<MetricSet> metrics() {
         if (metricsSet == null) {
-            metricsSet = 
unwrapIgniteImpl(node(0)).metricManager().metricSnapshot().metrics().get(SqlQueryMetricSource.NAME);
+            metricsSet = CLUSTER.runningNodes()
+                    .map(node -> 
unwrapIgniteImpl(node).metricManager().metricSnapshot().metrics().get(SqlQueryMetricSource.NAME))
+                    .collect(Collectors.toUnmodifiableList());
         }
+
         return metricsSet;
     }
 
@@ -197,9 +202,12 @@ public class ItJdbcQueryMetricsTest extends 
AbstractJdbcSelfTest {
     }
 
     private long metricValue(String name) {
-        LongMetric metric = metrics().get(name);
-        Objects.requireNonNull(metric, "metric does not exist: " + name);
+        return metrics().stream().mapToLong(metrics -> {
+            LongMetric metric = metrics.get(name);
+
+            assertNotNull(metric);
 
-        return metric.value();
+            return metric.value();
+        }).sum();
     }
 }
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcTransactionTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcTransactionTest.java
index ed4fa64a9da..d4a48ce8399 100644
--- 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcTransactionTest.java
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcTransactionTest.java
@@ -32,8 +32,10 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.TimeUnit;
 import org.apache.ignite.internal.testframework.IgniteTestUtils;
-import org.apache.ignite.internal.tx.TxManager;
+import org.awaitility.Awaitility;
+import org.hamcrest.Matcher;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -284,8 +286,6 @@ public class ItJdbcTransactionTest extends 
AbstractJdbcSelfTest {
      */
     @Test
     public void transactionIsRolledBackOnDisconnect() throws SQLException {
-        TxManager txManager = 
unwrapIgniteImpl(CLUSTER.aliveNode()).txManager();
-
         try (Connection conn = DriverManager.getConnection(URL)) {
             conn.setAutoCommit(false);
 
@@ -293,11 +293,11 @@ public class ItJdbcTransactionTest extends 
AbstractJdbcSelfTest {
                 int updateCount = stmt.executeUpdate("INSERT INTO test VALUES 
(0, '0'), (1, '1'), (2, '2')");
 
                 assertThat(updateCount, is(3));
-                assertThat(txManager.pending(), is(1));
+                expectPendingTransactions(is(1));
             }
         }
 
-        assertThat(txManager.pending(), is(0));
+        expectPendingTransactions(is(0));
 
         try (Connection conn = DriverManager.getConnection(URL)) {
             assertThat(rowsCount(conn), is(0));
@@ -309,28 +309,25 @@ public class ItJdbcTransactionTest extends 
AbstractJdbcSelfTest {
      */
     @Test
     public void transactionIsRolledBackOnDisconnectDuringQueryExecution() 
throws Exception {
-        TxManager txManager = 
unwrapIgniteImpl(CLUSTER.aliveNode()).txManager();
         CompletableFuture<?> updateFuture;
 
         try (Connection conn = DriverManager.getConnection(URL)) {
             conn.setAutoCommit(false);
 
-            assertThat(txManager.pending(), is(0));
+            expectPendingTransactions(is(0));
 
             try (Statement stmt = conn.createStatement()) {
                 updateFuture = IgniteTestUtils.runAsync(
                         () -> stmt.executeUpdate("INSERT INTO test(id) SELECT 
x FROM system_range(0, 10000000000)")
                 );
 
-                boolean txStarted = IgniteTestUtils.waitForCondition(() -> 
txManager.pending() == 1, 5_000);
-                assertThat(txStarted, is(true));
+                waitUntilPendingTransactions(is(1));
             }
         }
 
         assertThat(updateFuture, willThrowFast(SQLException.class));
 
-        boolean txFinished = IgniteTestUtils.waitForCondition(() -> 
txManager.pending() == 0, 5_000);
-        assertThat(txFinished, is(true));
+        waitUntilPendingTransactions(is(0));
 
         try (Connection conn = DriverManager.getConnection(URL)) {
             assertThat(rowsCount(conn), is(0));
@@ -406,6 +403,18 @@ public class ItJdbcTransactionTest extends 
AbstractJdbcSelfTest {
         }
     }
 
+    private static void waitUntilPendingTransactions(Matcher<Integer> matcher) 
{
+        Awaitility.await().timeout(5, TimeUnit.SECONDS).untilAsserted(
+                () -> expectPendingTransactions(matcher)
+        );
+    }
+
+    private static void expectPendingTransactions(Matcher<Integer> matcher) {
+        int pending = CLUSTER.runningNodes().mapToInt(node -> 
unwrapIgniteImpl(node).txManager().pending()).sum();
+
+        assertThat(pending, matcher);
+    }
+
     @FunctionalInterface
     private interface TestJdbcBatchInsertOperation {
         void run(Connection conn, Integer startRowId, Integer rowsCount) 
throws SQLException;
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcWithC3p0PoolTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcWithC3p0PoolTest.java
new file mode 100644
index 00000000000..a5b77698014
--- /dev/null
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcWithC3p0PoolTest.java
@@ -0,0 +1,35 @@
+/*
+ * 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.jdbc;
+
+import com.mchange.v2.c3p0.ComboPooledDataSource;
+import javax.sql.DataSource;
+
+/**
+ * Basic set of tests to ensure that JDBC driver works fine with {@code c3p0} 
connection pool.
+ */
+public class ItJdbcWithC3p0PoolTest extends ItJdbcWithConnectionPoolBaseTest {
+    @Override
+    protected DataSource getDataSource() {
+        ComboPooledDataSource cpds = new ComboPooledDataSource();
+
+        cpds.setJdbcUrl(connectionUrl());
+
+        return cpds;
+    }
+}
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcWithConnectionPoolBaseTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcWithConnectionPoolBaseTest.java
new file mode 100644
index 00000000000..2b6a635061b
--- /dev/null
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcWithConnectionPoolBaseTest.java
@@ -0,0 +1,245 @@
+/*
+ * 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.jdbc;
+
+import static org.apache.ignite.internal.TestWrappers.unwrapIgniteImpl;
+import static org.apache.ignite.internal.testframework.IgniteTestUtils.await;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.nullValue;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import java.io.Closeable;
+import java.sql.Connection;
+import java.sql.DatabaseMetaData;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CyclicBarrier;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+import javax.sql.DataSource;
+import org.apache.ignite.internal.ClusterPerClassIntegrationTest;
+import org.apache.ignite.internal.jdbc.JdbcDatabaseMetadata;
+import org.apache.ignite.internal.lang.IgniteStringFormatter;
+import org.apache.ignite.internal.testframework.IgniteTestUtils;
+import org.apache.ignite.internal.util.CompletableFutures;
+import org.awaitility.Awaitility;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Basic set of tests to ensure that JDBC driver works fine with connection 
pool.
+ */
+public abstract class ItJdbcWithConnectionPoolBaseTest extends 
ClusterPerClassIntegrationTest {
+    /** Connection pool. */
+    private DataSource dataSource;
+
+    @Override
+    protected int initialNodes() {
+        return 3;
+    }
+
+    protected abstract DataSource getDataSource();
+
+    @BeforeAll
+    void initDataSource() throws SQLException {
+        dataSource = getDataSource();
+
+        try (Connection conn = dataSource.getConnection()) {
+            try (Statement stmt = conn.createStatement()) {
+                stmt.execute("CREATE TABLE test (id INT PRIMARY KEY, val 
INT)");
+            }
+        }
+    }
+
+    @AfterAll
+    void shutdown() throws Exception {
+        if (dataSource instanceof Closeable) {
+            ((Closeable) dataSource).close();
+        } else if (dataSource instanceof AutoCloseable) {
+            ((AutoCloseable) dataSource).close();
+        } else {
+            throw new IllegalStateException("Cannot close the data source");
+        }
+
+        Awaitility.await().until(() -> 
ItJdbcStatementSelfTest.openResources(CLUSTER), is(0));
+    }
+
+    @AfterEach
+    void cleanup() throws SQLException {
+        try (Connection conn = dataSource.getConnection()) {
+            try (Statement stmt = conn.createStatement()) {
+                stmt.execute("DELETE FROM test");
+            }
+        }
+
+        Awaitility.await().until(() -> 
ItJdbcStatementSelfTest.openCursors(CLUSTER), is(0));
+    }
+
+    static String connectionUrl() {
+        String addresses = CLUSTER.runningNodes()
+                .map(ignite -> unwrapIgniteImpl(ignite).clientAddress().port())
+                .map(port -> "127.0.0.1" + ":" + port)
+                .collect(Collectors.joining(","));
+
+        String urlTemplate = "jdbc:ignite:thin://{}";
+
+        return IgniteStringFormatter.format(urlTemplate, addresses);
+    }
+
+    @Test
+    void testVisibilityOfChangesBetweenConnections() throws Exception {
+        try (Connection conn0 = dataSource.getConnection();
+                Connection conn1 = dataSource.getConnection();
+                Connection conn2 = dataSource.getConnection()) {
+
+            try (Statement createTableStmt = conn0.createStatement()) {
+                createTableStmt.executeUpdate(
+                        "CREATE TABLE specific_tab(id INT PRIMARY KEY, name 
VARCHAR(255))");
+            }
+
+            try (PreparedStatement insertStmt = conn1.prepareStatement(
+                    "INSERT INTO specific_tab VALUES (1, 'test_data')")) {
+                insertStmt.executeUpdate();
+            }
+
+            try (PreparedStatement selectStmt = conn2.prepareStatement(
+                    "SELECT COUNT(*) FROM specific_tab")) {
+                ResultSet rs = selectStmt.executeQuery();
+
+                assertThat(rs.next(), is(true));
+                assertThat(rs.getLong(1), is(1L));
+            }
+        }
+    }
+
+    @Test
+    public void multipleConnections() {
+        int connectionsCount = 100;
+
+        CyclicBarrier barrier = new CyclicBarrier(connectionsCount);
+
+        Callable<Integer> worker = () -> {
+            barrier.await(5, TimeUnit.SECONDS);
+
+            try (Connection conn = dataSource.getConnection()) {
+                try (Statement stmt = conn.createStatement();
+                        ResultSet rs = stmt.executeQuery("SELECT x FROM 
TABLE(SYSTEM_RANGE(1, 1000))")) {
+
+                    int sum = 0;
+
+                    while (rs.next()) {
+                        sum += rs.getInt(1);
+                    }
+
+                    return sum;
+                }
+            }
+        };
+
+        List<CompletableFuture<Integer>> futs = new 
ArrayList<>(connectionsCount);
+
+        for (int i = 0; i < connectionsCount; i++) {
+            // Depending on the pool size, workers will be executed 
sequentially or in parallel.
+            futs.add(IgniteTestUtils.runAsync(worker));
+        }
+
+        await(CompletableFutures.allOf(futs));
+
+        for (int i = 0; i < connectionsCount; i++) {
+            assertThat(futs.get(i).join(), is(((1 + 1000) * 1000) / 2));
+        }
+    }
+
+    @Test
+    public void transactionCommit() throws SQLException {
+        try (Connection conn = dataSource.getConnection()) {
+            conn.setAutoCommit(false);
+
+            try (Statement stmt = conn.createStatement()) {
+                stmt.execute("INSERT INTO test VALUES (1, 1), (123, 321)");
+            }
+
+            conn.commit();
+
+            try (Statement stmt = conn.createStatement();
+                    ResultSet rs = stmt.executeQuery("SELECT id, val FROM test 
ORDER BY id")) {
+                assertThat(rs.next(), is(true));
+                assertThat(rs.getInt(1), is(1));
+                assertThat(rs.getInt(2), is(1));
+
+                assertThat(rs.next(), is(true));
+                assertThat(rs.getInt(1), is(123));
+                assertThat(rs.getInt(2), is(321));
+            }
+        }
+    }
+
+    @Test
+    public void transactionRollback() throws SQLException {
+        try (Connection conn = dataSource.getConnection()) {
+            conn.setAutoCommit(false);
+
+            try (Statement stmt = conn.createStatement()) {
+                stmt.execute("INSERT INTO test VALUES (1, 1)");
+            }
+
+            conn.rollback();
+
+            try (Statement stmt = conn.createStatement();
+                    ResultSet rs = stmt.executeQuery("SELECT id, val FROM 
test")) {
+                assertThat(rs.next(), is(false));
+            }
+        }
+    }
+
+    @Test
+    public void getConnectionAfterException() throws SQLException {
+        try (Connection conn = dataSource.getConnection();
+                Statement stmt = conn.createStatement()) {
+            assertThrows(SQLException.class, () -> stmt.executeQuery("SELECT 
x/(x-10) FROM TABLE(SYSTEM_RANGE(1,20)"));
+        }
+
+        try (Connection conn = dataSource.getConnection();
+                Statement stmt = conn.createStatement();
+                ResultSet rs = stmt.executeQuery("SELECT 1")) {
+            assertThat(rs.next(), is(true));
+            assertThat(rs.getInt(1), is(1));
+        }
+    }
+
+    @Test
+    public void testConnectionMetadata() throws SQLException {
+        try (Connection conn = dataSource.getConnection()) {
+            DatabaseMetaData meta = conn.getMetaData();
+            assertThat(meta.getURL(), containsString(connectionUrl()));
+            assertThat(meta.getUserName(), nullValue());
+            assertThat(meta.getDriverName(), 
is(JdbcDatabaseMetadata.DRIVER_NAME));
+            assertThat(meta.getDatabaseProductName(), 
is(JdbcDatabaseMetadata.PRODUCT_NAME));
+        }
+    }
+}
diff --git 
a/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcWithHikariPoolTest.java
 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcWithHikariPoolTest.java
new file mode 100644
index 00000000000..a2feab94ad2
--- /dev/null
+++ 
b/modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcWithHikariPoolTest.java
@@ -0,0 +1,36 @@
+/*
+ * 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.jdbc;
+
+import com.zaxxer.hikari.HikariConfig;
+import com.zaxxer.hikari.HikariDataSource;
+import javax.sql.DataSource;
+
+/**
+ * Basic set of tests to ensure that JDBC driver works fine with {@code 
Hikari} connection pool.
+ */
+public class ItJdbcWithHikariPoolTest extends ItJdbcWithConnectionPoolBaseTest 
{
+    @Override
+    protected DataSource getDataSource() {
+        HikariConfig config = new HikariConfig();
+
+        config.setJdbcUrl(connectionUrl());
+
+        return new HikariDataSource(config);
+    }
+}
diff --git 
a/modules/jdbc/src/main/java/org/apache/ignite/internal/jdbc/JdbcDatabaseMetadata.java
 
b/modules/jdbc/src/main/java/org/apache/ignite/internal/jdbc/JdbcDatabaseMetadata.java
index d58df2df21d..8a7baea022b 100644
--- 
a/modules/jdbc/src/main/java/org/apache/ignite/internal/jdbc/JdbcDatabaseMetadata.java
+++ 
b/modules/jdbc/src/main/java/org/apache/ignite/internal/jdbc/JdbcDatabaseMetadata.java
@@ -64,6 +64,9 @@ public class JdbcDatabaseMetadata implements DatabaseMetaData 
{
     /** Driver name. */
     public static final String DRIVER_NAME = "Apache Ignite JDBC Driver";
 
+    /** Product name. */
+    public static final String PRODUCT_NAME = "Apache Ignite";
+
     /** The only possible name for catalog. */
     public static final String CATALOG_NAME = "IGNITE";
 
@@ -158,7 +161,7 @@ public class JdbcDatabaseMetadata implements 
DatabaseMetaData {
     /** {@inheritDoc} */
     @Override
     public String getDatabaseProductName() {
-        return "Apache Ignite";
+        return PRODUCT_NAME;
     }
 
     /** {@inheritDoc} */
diff --git 
a/modules/jdbc/src/main/java/org/apache/ignite/internal/jdbc2/JdbcConnection2.java
 
b/modules/jdbc/src/main/java/org/apache/ignite/internal/jdbc2/JdbcConnection2.java
index 431bcc26e65..d0bc1ee21db 100644
--- 
a/modules/jdbc/src/main/java/org/apache/ignite/internal/jdbc2/JdbcConnection2.java
+++ 
b/modules/jdbc/src/main/java/org/apache/ignite/internal/jdbc2/JdbcConnection2.java
@@ -47,6 +47,7 @@ import java.util.Properties;
 import java.util.concurrent.Executor;
 import java.util.concurrent.locks.ReentrantLock;
 import org.apache.ignite.client.IgniteClient;
+import org.apache.ignite.internal.client.TcpIgniteClient;
 import org.apache.ignite.internal.jdbc.ConnectionProperties;
 import org.apache.ignite.internal.jdbc.JdbcDatabaseMetadata;
 import org.apache.ignite.internal.jdbc.proto.JdbcQueryEventHandler;
@@ -836,6 +837,11 @@ public class JdbcConnection2 implements Connection {
         igniteClient.close();
     }
 
+    @TestOnly
+    public int channelsCount() {
+        return ((TcpIgniteClient) igniteClient).channel().channels().size();
+    }
+
     private static void checkCursorOptions(
             int resSetType,
             int resSetConcurrency,
diff --git 
a/modules/runner/src/integrationTest/java/org/apache/ignite/internal/runner/app/client/ItThinClientChannelValidatorTest.java
 
b/modules/runner/src/integrationTest/java/org/apache/ignite/internal/runner/app/client/ItThinClientChannelValidatorTest.java
index 0ec3f423661..53e3ed5bcf0 100644
--- 
a/modules/runner/src/integrationTest/java/org/apache/ignite/internal/runner/app/client/ItThinClientChannelValidatorTest.java
+++ 
b/modules/runner/src/integrationTest/java/org/apache/ignite/internal/runner/app/client/ItThinClientChannelValidatorTest.java
@@ -213,7 +213,8 @@ public class ItThinClientChannelValidatorTest extends 
BaseIgniteAbstractTest {
                 false,
                 null,
                 IgniteClientConfiguration.DFLT_OPERATION_TIMEOUT,
-                
IgniteClientConfiguration.DFLT_SQL_PARTITION_AWARENESS_METADATA_CACHE_SIZE
+                
IgniteClientConfiguration.DFLT_SQL_PARTITION_AWARENESS_METADATA_CACHE_SIZE,
+                null
         );
 
         return await(TcpIgniteClient.startAsync(
diff --git 
a/modules/runner/src/integrationTest/java/org/apache/ignite/internal/runner/app/client/ItThinClientSqlTest.java
 
b/modules/runner/src/integrationTest/java/org/apache/ignite/internal/runner/app/client/ItThinClientSqlTest.java
index f840a8af022..1e2ec681cfc 100644
--- 
a/modules/runner/src/integrationTest/java/org/apache/ignite/internal/runner/app/client/ItThinClientSqlTest.java
+++ 
b/modules/runner/src/integrationTest/java/org/apache/ignite/internal/runner/app/client/ItThinClientSqlTest.java
@@ -50,7 +50,6 @@ import 
org.apache.ignite.internal.security.authentication.UserDetails;
 import org.apache.ignite.internal.testframework.IgniteTestUtils;
 import org.apache.ignite.internal.tx.TxManager;
 import org.apache.ignite.internal.tx.impl.TransactionInflights;
-import org.apache.ignite.internal.testframework.IgniteTestUtils;
 import org.apache.ignite.lang.IgniteException;
 import org.apache.ignite.sql.ColumnMetadata;
 import org.apache.ignite.sql.ColumnType;
diff --git 
a/modules/sql-engine/src/integrationTest/java/org/apache/ignite/internal/sql/engine/kill/ItSqlKillCommandTest.java
 
b/modules/sql-engine/src/integrationTest/java/org/apache/ignite/internal/sql/engine/kill/ItSqlKillCommandTest.java
index e47cb64600d..6ce4cc0621b 100644
--- 
a/modules/sql-engine/src/integrationTest/java/org/apache/ignite/internal/sql/engine/kill/ItSqlKillCommandTest.java
+++ 
b/modules/sql-engine/src/integrationTest/java/org/apache/ignite/internal/sql/engine/kill/ItSqlKillCommandTest.java
@@ -319,11 +319,7 @@ public class ItSqlKillCommandTest extends 
BaseSqlIntegrationTest {
     }
 
     private static void waitUntilRunningQueriesCountInCluster(Matcher<Integer> 
matcher) {
-        CLUSTER.runningNodes().forEach(node -> {
-            SqlQueryProcessor queryProcessor = (SqlQueryProcessor) 
unwrapIgniteImpl(node).queryEngine();
-
-            SqlTestUtils.waitUntilRunningQueriesCount(queryProcessor, matcher);
-        });
+        SqlTestUtils.waitUntilRunningQueriesCount(CLUSTER, matcher);
     }
 
     private static JobExecution<Void> submit(Ignite node, JobDescriptor<Void, 
Void> job) {
diff --git 
a/modules/sql-engine/src/integrationTest/java/org/apache/ignite/internal/sql/engine/systemviews/ItSqlQueriesSystemViewTest.java
 
b/modules/sql-engine/src/integrationTest/java/org/apache/ignite/internal/sql/engine/systemviews/ItSqlQueriesSystemViewTest.java
index ebeed48dcd6..0bf3d407015 100644
--- 
a/modules/sql-engine/src/integrationTest/java/org/apache/ignite/internal/sql/engine/systemviews/ItSqlQueriesSystemViewTest.java
+++ 
b/modules/sql-engine/src/integrationTest/java/org/apache/ignite/internal/sql/engine/systemviews/ItSqlQueriesSystemViewTest.java
@@ -34,13 +34,11 @@ import java.time.Instant;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
-import java.util.stream.Collectors;
 import org.apache.ignite.Ignite;
 import org.apache.ignite.internal.hlc.ClockService;
 import org.apache.ignite.internal.sql.SqlCommon;
 import org.apache.ignite.internal.sql.engine.AsyncSqlCursor;
 import org.apache.ignite.internal.sql.engine.InternalSqlRow;
-import org.apache.ignite.internal.sql.engine.SqlQueryProcessor;
 import org.apache.ignite.internal.sql.engine.SqlQueryType;
 import org.apache.ignite.internal.sql.engine.util.MetadataMatcher;
 import org.apache.ignite.internal.sql.engine.util.SqlTestUtils;
@@ -315,13 +313,7 @@ public class ItSqlQueriesSystemViewTest extends 
AbstractSystemViewTest {
     }
 
     private void checkNoPendingQueries() {
-        List<Ignite> nodes = 
CLUSTER.runningNodes().collect(Collectors.toList());
-
-        for (Ignite node : nodes) {
-            SqlQueryProcessor queryProcessor = (SqlQueryProcessor) 
unwrapIgniteImpl(node).queryEngine();
-
-            SqlTestUtils.waitUntilRunningQueriesCount(queryProcessor, is(0));
-        }
+        SqlTestUtils.waitUntilRunningQueriesCount(CLUSTER, is(0));
     }
 
     private static void verifyQueryInfo(
diff --git 
a/modules/sql-engine/src/testFixtures/java/org/apache/ignite/internal/sql/BaseSqlIntegrationTest.java
 
b/modules/sql-engine/src/testFixtures/java/org/apache/ignite/internal/sql/BaseSqlIntegrationTest.java
index ca39a5353aa..8cde4ea6a89 100644
--- 
a/modules/sql-engine/src/testFixtures/java/org/apache/ignite/internal/sql/BaseSqlIntegrationTest.java
+++ 
b/modules/sql-engine/src/testFixtures/java/org/apache/ignite/internal/sql/BaseSqlIntegrationTest.java
@@ -282,7 +282,7 @@ public abstract class BaseSqlIntegrationTest extends 
ClusterPerClassIntegrationT
      * @throws AssertionError If after waiting the number of running queries 
still does not match the specified matcher.
      */
     protected void waitUntilRunningQueriesCount(Matcher<Integer> matcher) {
-        SqlTestUtils.waitUntilRunningQueriesCount(queryProcessor(), matcher);
+        SqlTestUtils.waitUntilRunningQueriesCount(CLUSTER, matcher);
     }
 
     /**
diff --git 
a/modules/sql-engine/src/testFixtures/java/org/apache/ignite/internal/sql/engine/util/SqlTestUtils.java
 
b/modules/sql-engine/src/testFixtures/java/org/apache/ignite/internal/sql/engine/util/SqlTestUtils.java
index a560000f3f3..e6addf3fdbb 100644
--- 
a/modules/sql-engine/src/testFixtures/java/org/apache/ignite/internal/sql/engine/util/SqlTestUtils.java
+++ 
b/modules/sql-engine/src/testFixtures/java/org/apache/ignite/internal/sql/engine/util/SqlTestUtils.java
@@ -20,6 +20,7 @@ package org.apache.ignite.internal.sql.engine.util;
 import static java.time.format.DateTimeFormatter.ISO_LOCAL_DATE;
 import static java.time.format.DateTimeFormatter.ISO_LOCAL_TIME;
 import static java.util.Objects.requireNonNull;
+import static org.apache.ignite.internal.TestWrappers.unwrapIgniteImpl;
 import static org.apache.ignite.internal.lang.IgniteStringFormatter.format;
 import static 
org.apache.ignite.internal.sql.engine.QueryCancelledException.CANCEL_MSG;
 import static org.apache.ignite.internal.sql.engine.util.TypeUtils.columnType;
@@ -54,6 +55,7 @@ import java.util.Map;
 import java.util.UUID;
 import java.util.concurrent.ThreadLocalRandom;
 import java.util.concurrent.TimeUnit;
+import java.util.function.ToIntFunction;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
@@ -65,6 +67,8 @@ import org.apache.calcite.sql.type.SqlTypeName;
 import org.apache.calcite.util.DateString;
 import org.apache.calcite.util.TimeString;
 import org.apache.calcite.util.TimestampString;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.internal.Cluster;
 import org.apache.ignite.internal.sql.engine.InternalSqlRow;
 import org.apache.ignite.internal.sql.engine.QueryCancelledException;
 import org.apache.ignite.internal.sql.engine.SqlQueryProcessor;
@@ -587,12 +591,16 @@ public class SqlTestUtils {
     /**
      * Waits until the number of running queries matches the specified matcher.
      *
-     * @param queryProcessor Query processor.
+     * @param cluster Cluster.
      * @param matcher Matcher to check the number of running queries.
      * @throws AssertionError If after waiting the number of running queries 
still does not match the specified matcher.
      */
-    public static void waitUntilRunningQueriesCount(SqlQueryProcessor 
queryProcessor, Matcher<Integer> matcher) {
-        Awaitility.await().untilAsserted(() -> 
assertThat(queryProcessor.runningQueries().size(), matcher));
+    public static void waitUntilRunningQueriesCount(Cluster cluster, 
Matcher<Integer> matcher) {
+        ToIntFunction<Ignite> queriesCountPerNode = node ->
+                ((SqlQueryProcessor) 
unwrapIgniteImpl(node).queryEngine()).runningQueries().size();
+
+        Awaitility.await().timeout(5, TimeUnit.SECONDS)
+                .until(() -> 
cluster.runningNodes().mapToInt(queriesCountPerNode).sum(), matcher);
     }
 
     /**


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